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词条 List of Horizon episodes
释义

  1. Series 1: 1964–1965

  2. Series 2: 1965–1966

  3. Series 3: 1966–1967

  4. Series 4: 1967–1968

  5. Series 5: 1968–1969

  6. Series 6: 1969–1970

  7. Series 7: 1970–1971

  8. Series 8: 1971–1972

  9. Series 9: 1972–1973

  10. Series 10: 1973–1974

  11. Series 11: 1974–1975

  12. Series 12: 1975–1976

  13. Series 13: 1976–1977

  14. Series 14: 1977–1978

  15. Series 15: 1978–1979

  16. Series 16: 1979–1980

  17. Series 17: 1980–1981

  18. Series 18: 1981–1982

  19. Series 19: 1982–1983

  20. Series 20: 1983–1984

  21. Series 21: 1984–1985

  22. Series 22: 1985–1986

  23. Series 23: 1986–1987

  24. Series 24: 1987–1988

  25. Series 25: 1988–1989

  26. Series 26: 1989–1990

  27. Series 27: 1990–1991

  28. Series 28: 1991–1992

  29. Series 29: 1992–1993

  30. Series 30: 1993–1994

  31. Series 31: 1994–1995

  32. Series 32: 1995–1996

  33. Series 33: 1996–1997

  34. Series 34: 1997–1998

  35. Series 35: 1998–1999

  36. Series 36: 1999–2000

  37. Series 37: 2000–2001

  38. Series 38: 2001–2002

  39. Series 39: 2002–2003

  40. Series 40: 2003–2004

  41. Series 41: 2004–2005

  42. Series 42: 2005–2006

  43. Series 43: 2006–2007

  44. Series 44: 2007–2008

  45. Series 45: 2008–2009

  46. Series 46: 2009–2010

  47. Series 47: 2010–2011

  48. Series 48: 2011–2012

  49. Series 49: 2012–2013

  50. Series 50: 2013–2014

  51. Series 51: 2014–2015

  52. Series 52: 2016

  53. Series 53: 2017

  54. Series 54: 2018

  55. Series 55: 2019

  56. References

{{Use dmy dates|date=February 2015}}{{Use British English|date=February 2015}}{{DISPLAYTITLE:List of Horizon episodes}}Horizon is a current and long-running BBC popular science and philosophy documentary

programme. Series one was broadcast in 1964 and {{as of|August 2018|lc=y}} is in its 54th series. Over 1200 episodes have been broadcast (including specials) with an average of 24 episodes per series during the 54-year run.

  • 1964–1969 – 135 episodes
  • 1970–1979 – 299 episodes
  • 1980–1989 – 234 episodes
  • 1990–1999 – 220 episodes
  • 2000–2009 – 193 episodes
  • Since 2010 – 126 episodes

Series 1: 1964–1965

TitleOriginal broadcast dateEpisode{{Episode listTitle=The World of Buckminster Fullerdf=yes|1964|05|02}}ProdCode=1ShortSummary = The famous domes of Buckminster Fuller have covered more square feet of the earth's surface than any other structure. I'm not a dome salesman, I'm an explorer in structures. I'm interested in the main fundamental principles of how nature holds her shapes together.[1]
}}{{Episode list		Title=Pesticides and Posteritydf=yes|1964|05|30}}ProdCode=2ShortSummary = Is the widespread use of highly persistent pesticides raising a new kind of ecological problem for our own and future generations to solve? Do we yet know enough to assess the risks we are taking? The scientific and moral aspects as seen by Dr. Frank Fraser Darling Vice-President of the Conservation Foundation, Dr. Eric Edson Research director of a leading pesticide company. The ethics of environmental contamination discussed by Lord Rothschild, F.R.S. Director of research of a large chemical company, Robert Boote of the Nature Conservancy, John Maynard Smith a zoologist of University College, London, Editorial adviser, Gerald Leach.[2]
}}{{Episode list		Title=A Candle to Naturedf=yes|1964|06|27}}ProdCode=3ShortSummary = The changing attitudes of science through two lectures, given more than a hundred years apart, on-the candle. The first lecture was given by Michael Faraday 1791-1867 Fullerian Professor of Chemistry, Royal Institution, London. The second lecture is given by George Porter born 1920 Professor of Chemistry, Sheffield University
}}{{Episode list		Title=Strangeness Minus Threedf=yes|1964|07|25}}ProdCode=4ShortSummary = Horizon interviews physicists on their theories of the structure of matter. Richard Feynman, Murray Gell-Mann, Yuval Ne'eman and Nicholas Samios explain their current understanding of the Omega-minus particle (Omega baryon).
}}{{Episode list		Title=The Air of Sciencedf=yes|1964|08|22}}ProdCode=5ShortSummary = "Facts are the air of science," declared the famous Russian physiologist Pavlov. Laboratories are where most of the facts are gathered. What goes on inside a big science laboratory? What do scientists worry about? Horizon went to the biggest laboratory of its kind in the Commonwealth, the National Institute for Medical Research, to meet the Director of the laboratory, Dr. P.B. Medawar, and some of the 550 men and women who breathe the air of science.
}}{{Episode list		Title=The Knowledge Explosiondf=yes|1964|09|21}}ProdCode=6ShortSummary = The output of scientific knowledge doubles every thirty years. Can this incredible rate of growth continue indefinitely? If it slows down, which countries will suffer most? Arthur Clarke discusses some of the problems most likely to demand scientific attention, and. Professor Derek De S. Price analyses the process of scientific growth.
}}{{Episode list		Title=The Amateur Scientistdf=yes|1964|10|19}}ProdCode=7ShortSummary = Has science become so expensive and complex today that the amateur can no longer participate? Tonight we meet a few of the amateurs who are participating; they include a radio astronomer, a microscopist, a palaeoanthropologist, and a Scottish Minister of the Church who is a world expert on computing the position of comets. The programme is introduced by C. L. Stong the writer of the monthly column on amateur science in the Scientific American
}}{{Episode list		Title=Tots and Quots and Woodgeriedf=yes|1964|11|16}}ProdCode=8ShortSummary = Today we accept the idea that science must play an important role in society. Thirty years ago, such a conception was extremely novel. And it was then that some young scientists formed themselves into groups with strange names-to consider the future of science in all its aspects. In the course of time many of their plans and predictions were to be realised.
}}{{Episode list		Title=Professor J.B.S. Haldane, Obituarydf=yes|1964|12|01}}ProdCode=9
}}{{Episode list		Title=Science, Toys and Magicdf=yes|1964|12|14}}ProdCode=10ShortSummary = Horizon takes a look at science in the spirit of Christmas.
}}{{Episode list		Title=Learning from Machinesdf=yes|1965|01|06}}ProdCode=11ShortSummary = At a time when the use of teaching machines is fast expanding, Horizon looks at the principles behind them and enquires into their success. Those appearing include Professor B. F. Skinner a learning psychologist of Harvard and Gordon Pask, a pioneer of the teaching machine who explains how putting man and machine together to learn from each other is a valuable way to find out how we learn.
}}{{Episode list		Title=The Technique of Changedf=yes|1965|01|20}}ProdCode=12ShortSummary =A profile of one of the world's most important research and development centres. Twenty-five miles from New York City in acres of parkland stand the squat main laboratory buildings of the Bell Telephone System. Four thousand scientists work there with an annual budget of £100 million. Is this the sort of place we should set up in Britain?[3]
}}{{Episode list		Title=Star Gazersdf=yes|1965|02|03}}ProdCode=13ShortSummary = An observatory hundreds of miles above the earth. Astronomy has come a long way since Isaac Newton saw an apple fall 298 years ago and formulated the law of universal gravitation. This year America plans to launch an observatory into space to map the universe and try to discover clues to the creation of stars. There are other plans for a new giant telescope to be financed by Britain and Australia.
}}{{Episode list		Title=Science and Artdf=yes|1965|02|17}}ProdCode=14ShortSummary = "I find it a fantastic arrogance for artists to say that they can sit back in their studios and paint. Unfortunately the artist is not only tolerated but encouraged to do this - there is no science course for artists and I would have thought it indispensable." Frank Avray Wilson. Discussion involving Wilson, Filipino artist and writer David Medalla, Dr. Alex Comfort author, poet, and zoologist and Professor Abdus Salam nuclear physicist, who today publishes a new theory which some scientists believe may be 'the final key to unlocking the door that conceals the properties of space and time'.
}}{{Episode list		Title=The Great Computer Scandal / H-Bomb Detectorsdf=yes|1965|03|03}}ProdCode=15ShortSummary = "The Great Computer Scandal: A report on the state of big research computers. H-Bomb Detectors: Sir Edward Bullard, tells how British scientists have developed a nuclear explosion detector which has changed the political and international outlook for nuclear test controls.[4]
}}{{Episode list		df=yes|1965|03|17}}ProdCode=16Title = Forbidden Events / I am a MadmanShortSummary =Forbidden Events: Is there a fifth force in the Universe, or must we revise our ideas about time? Horizon visits the Rutherford High Energy Laboratory where an experiment is running to settle this, and talks to Dr. Lipman. I am a Madman: Psychiatrists from all over the world met in London recently to compare notes. Such comparisons are giving new insight into the causes of mental illness.
}}{{Episode list		Title=Restless Genius / Faster, Farther, HigherShortSummary =A tribute to Robert Hooke and a wry look at acceleration.[5]df=yes|1965|03|31}}ProdCode=17
}}{{Episode list		Title=Other Side of the Pilldf=yes|1965|04|14}}ProdCode=18ShortSummary =Every day, on average, another 431 British women start taking the contraceptive pill. The manufacturers insist that it is the most carefully tested drug on the market today. But some scientists and doctors are concerned about the potential long-term effects of taking it.
}}{{Episode list		df=yes|1965|05|12}}ProdCode=19Title = The Big Smoke / The Model MakersShortSummary =Introduced by Colin Riach The Big Smoke: Nine years after the passing of the Clean Air Act, where do we stand? Scientists are gradually finding out why dirty air is so harmful to ill persons with Dr. P. J. Lawther of Air Pollution Research Centre at St. Bartholomew's Hospital; The Model Makers: Whenever the things they study are too big, too far off, or too hot to handle, scientists can make a model of these-but can they be sure their models truly represent reality? with Rum Harre, Dr. Harry Rosenberg of the Clarendon Laboratory, Jack Hanson of the Royal Aircraft Establishment, Professor Roger Blin-Stoyle of Sussex University and Nike Arrighi.

Introduced by John Napier, Studio director Peter Smith, Producers Richard Mason and Norman James. Presented by Michael Latham. Series editor G. Rattray Taylor.[6]


}}{{Episode list		df=yes|1965|05|26}}ProdCode=20Title = The Long Slide / Men with Gills}{{Episode listdf=yes|1965|06|09}}ProdCode=21Title = Men and Sharks / Sir Henry Dale, OM, FRS}{{Episode listdf=yes|1965|06|23}}ProdCode=22Title = The Brain Gain / The Sudden Night / Learning to Speak}{{Episode listTitle=Dr. Joseph Needham / Mariner 4df=yes|1965|07|14}}ProdCode=23
}}{{Episode list		df=yes|1965|07|28}}ProdCode=24Title = Science Fiction : Science Fact / Alone and Unarmed}{{Episode listTitle=Certain of Uncertainty / State of Naturedf=yes|1965|08|11}}ProdCode=25
}}{{Episode list		df=yes|1965|08|25}}ProdCode=26Title = Time Stood Still / Weighty Matters}{{Episode listTitle=Fuel for the Future / Collector's Piecedf=yes|1965|09|08}}ProdCode=27ShortSummary = The world's first commercial nuclear reactor to produce electric power more cheaply than is possible from coal or oil was recently commissioned by Britain's Central Electricity Generating Board. Horizon visits the Atomic Energy Research Establishment at Winfrith Heath where John Charap talks to Dr. Peter Mummery, Deputy Director. In the studio David Prowitt and David Wilson discuss this important development
}}{{Episode list		Title=Let Newton Bedf=yes|1965|09|22}}ProdCode=28ShortSummary = On the 300th anniversary of Isaac Newton's greatest year of discovery one of his most ardent disciples, Professor Julius Sumner-Miller, comes from California to celebrate the occasion and to illustrate the excitement of seeing Newton's principles in action.
}}

Series 2: 1965–1966

TitleOriginal broadcast dateEpisode{{Episode listTitle=Special Sensesdf=yes|1965|10|10}}ProdCode=1ShortSummary = What sort of person can invent a 3-D microscope, a new way of photographing the moon, publish fifty papers on perception, and spend three weeks hunting for a minute sea creature to see how its eyes work? Cambridge psychologist Richard Gregory is a man of many facets. Tonight's film examines his inventiveness, its sources and its products.[7]
}}{{Episode list		Title=An Affair of the Heartdf=yes|1965|10|24}}ProdCode=2ShortSummary = Mystery still surrounds the killer disease of coronary thrombosis. It strikes without warning and claims increasing numbers of victims each year. What progress is being made towards the conquest of coronary thrombosis, which, with other similar diseases, is responsible for one in every two deaths in this country?[8]
}}{{Episode list		Title=10,000 Tombsdf=yes|1965|11|07}}ProdCode=3ShortSummary = Carlo Lerici, scientist and archaeologist, has brought past and future together. Using geophysical methods intended for mineral surveying, he has detected 10,000 unknown Etruscan tombs in ten years.[9]
}}{{Episode list		Title=Toil, Sweat & Tearsdf=yes|1965|11|21}}ProdCode=4ShortSummary = Enzymes are the key to life processes-how do they work? An M.R.C. team at the Royal Institution, headed by Dr. D.C.Phillips, has taken the first step towards answering this vital question.[10]
}}{{Episode list		Title=The Big Dishes / The Living Streamdf=yes|1965|12|05}}ProdCode=5ShortSummary = The Big Dishes: A look at some of the huge new radio telescopes which have recently started work in Britain, France, Russia, America, and elsewhere. Sir Bernard Lovell, Professor Martin Ryle and M. Emiljacques Blum explain the scientific motive for this vast expenditure. The Living Stream: Sir Alister Hardy, F.R.S., formerly Linacre Professor of Zoology at Oxford. discusses his controversial book on evolution.[11]
}}{{Episode list		Title=Boys on Bubbles / Problems and Puzzlesdf=yes|1965|12|19}}ProdCode=6ShortSummary = Boys on Bubbles: Horizon re-stages highlights from Professor C.V. Boys' famous Christmas lectures on bubbles and surface tension which drew crowds to the London Institution sixty-six years ago. Problems and Puzzles: T.H. O'Beirne, a mathematician, challenges you to solve some of the puzzles he has invented.
}}{{Episode list		Title=Windows of the Soul / Elixir of Youthdf=yes|1966|01|02}}ProdCode=7ShortSummary = Windows of the soul: Psychological experiments at the University of Chicago which suggest our eyes can tell scientists things we might prefer to keep secret with, Dr. Eckhard H. Hess, Chairman of the Psychology Department, University of Chicago. Elixir of youth: In Rumania, more than forty thousand people have been given gerovital H3, in the belief that it will make them younger, by Dr. Ana Aslan, Dr. Alex Comfort comments on a film about this mass experiment.[12]
}}{{Episode list		Title=The Troubled Mind / Triple-A. S.df=yes|1966|01|16}}ProdCode=8
}}{{Episode list		Title=A Man of Two Visions / The Scientist Applieddf=yes|1966|01|30}}ProdCode=9
}}{{Episode list		Title=The Dolphins that Joined The Navy / A Theory of The Earthdf=yes|1966|02|13}}ProdCode=10
}}{{Episode list		Title=Route 128 / A Theory of The Earthdf=yes|1966|02|27}}ProdCode=11
}}{{Episode list		Title=The Beginning of Life / Science Frictiondf=yes|1966|03|13}}ProdCode=12
}}{{Episode list		Title=So you want to be an Inventor? / The Severed Handdf=yes|1966|03|27}}ProdCode=13
}}{{Episode list		Title=Chance and Decay / Meteorite Mysterydf=yes|1966|04|10}}ProdCode=14
}}{{Episode list		Title=Towers of Ilium / The Exploding Citydf=yes|1966|04|24}}ProdCode=15
}}{{Episode list		Title=Man in Spacedf=yes|1966|05|08}}ProdCode=16ShortSummary = Colonel Frank Borman Is one of the twenty-three men who have orbited the Earth, and in the most detailed television interview ever filmed with an astronaut he tells of the experience. How does a man live in space? How does he eat, excrete, and sleep? And how does he survive the stresses of launch and re-entry? David Lutyens reports from the manned spacecraft centre at Houston, Texas.
}}{{Episode list		Title=Destination Mars / Editors in Conferencedf=yes|1966|05|22}}ProdCode=17
}}{{Episode list		Title=Man meets Duck / The Picture Machinesdf=yes|1966|06|05}}ProdCode=18
}}{{Episode list		Title=Where must the Money Go? / Phantoms Incorporateddf=yes|1966|06|19}}ProdCode=19
}}{{Episode list		Title=Genes in Action / Scientists and Wardf=yes|1966|07|03}}ProdCode=20
}}{{Episode list		Title=The Lonely Childrendf=yes|1966|07|17}}ProdCode=21ShortSummary = They're called aloof, self-absorbed. They don't meet your eyes, won't be cuddled, can't play with other children. They are autistic children. This programme looks at this heart-rending condition and examines the way in which medicine is studying these children.
}}{{Episode list		Title=Man of Science / 'Nature' Tomorrowdf=yes|1966|07|31}}ProdCode=22
}}{{Episode list		Title=Science Fiction, Science Fact / The Dolphins that Joined The Navydf=yes|1966|09|11}}ProdCode=23
}}{{Episode list		Title=M.I.T.'s ABC / The Disturbed Childdf=yes|1966|09|25}}ProdCode=24
}}

Series 3: 1966–1967

TitleOriginal broadcast dateEpisode{{Episode listTitle=Ten Years in the Antarcticdf=yes|1966|10|10}}ProdCode=1ShortSummary = Sir Vivian Fuchs and many other Antarctica experts describe how they have probed the secrets of a world covered with a one-mile-thick blanket of ice.[13]
}}{{Episode list		Title=The Athletedf=yes|1966|10|24}}ProdCode=2ShortSummary = Is there any limit to improvements In human athletic performance? If so, what? Roger Bannister, the first four-minute miler, discusses his performances In tonight's programme with physiologists and psychiatrists who make their predictions.[14]
}}{{Episode list		Title=From Peenemunde to the Moondf=yes|1966|11|07}}ProdCode=3ShortSummary = If U.S. hopes are fulfilled, the tremendous power of the Saturn IB rocket motor should, within a few weeks, lift a three-man spacecraft to orbit the earth. Wernher von Braun, the German V2 rocket engineer who played a critical part in the development of U.S. rocketry, appears in a report on 700 years of rocket science and its attempt to realise a space travel dream.[15]
}}{{Episode list		Title=Sex-Change?df=yes|1966|11|21}}ProdCode=4ShortSummary = Sex-change frequently makes press headlines along with confusing reports of the physiology involved. The withdrawal of five gold-medal-winning women athletes from this year's European Championships, supposedly to avoid the recently introduced 'sex checks' has raised the question again. What does 'sex-change' mean? Does it, in fact, happen? In one of tonight's items Horizon looks at this complex psychological and physiological subject.[16]
}}{{Episode list		Title=The Structure of Lifedf=yes|1966|12|05}}ProdCode=5ShortSummary = For their work on penicillin, the drug which saved so many lives in World War II, three men were awarded the Nobel Prize. Tonight's film looks at one of these men, Professor Ernst Chain. It also looks at the remarkable growth during this century of biochemistry and at some of the unusual research in progress in Professor Chain's new £1,500,000 Biochemistry Department at Imperial College.[17]
}}{{Episode list		Title=Hand Me My Sword, Humphreydf=yes|1966|12|25}}ProdCode=6
}}{{Episode list		Title=Sons of Caindf=yes|1967|01|17}}ProdCode=7ShortSummary = A study of aggression. Cain, the son of Adam, was the first violent murderer after the Garden of Eden. Have we inevitably inherited his worst characteristics? Is aggression our birthright? Can a society exist without violence? None too soon our aggressive instinct is being given a thorough scientific analysis. Konrad Lorenz and scientists from many other disciplines look at aggression and violence in our time.[18]
}}{{Episode list		Title=How Best to Make a Man, How Best to Make a Scientistdf=yes|1967|02|14}}ProdCode=8ShortSummary = How best to make a man: Learning begins at birth. A Harvard scientist has begun a series of experiments to try to understand some of the complex processes involved. This film shows the first intriguing steps he has taken with a three-month-old baby: possibly the earliest stages in discovering. How best to make a scientist: Most people in this country are scientifically illiterate, yet most of us were taught some science at school. Is it so difficult-or were we taught in the wrong way? Horizon takes a critical look at some new approaches to science teaching.[19]
}}{{Episode list		Title=Dynamo, The Life of Michael Faradaydf=yes|1967|02|28}}ProdCode=9ShortSummary = Dynamo is the life story of a supreme experimentalist: it relives some of the turning points in Faraday's remarkable career in science, and reconstructs the crucial work he carried out in the laboratory at the Royal Institution, which remains as it was when he worked there a hundred years ago.[20]
}}{{Episode list		Title=Migrainedf=yes|1967|03|14}}ProdCode=10ShortSummary = A form of torture that leaves no mark... It's ruined my life... perhaps it's an escape from something I don't want to face. Horizon looks at some of the recent research work which is attempting to understand and provide a treatment for this serious illness.[21]
}}{{Episode list		Title=How Safe Is Surgery?df=yes|1967|03|28}}ProdCode=11ShortSummary = Of the one-and-a-half million operations carried out in Britain every year it is estimated that from two to twenty per cent result in wound infection, which can lead to septicemia and in some cases death. Surgeons today perform operations which would have seemed miraculous only a few years ago: but even now, a century after Joseph Lister published the first accounts of his revolutionary technique of antiseptic surgery, infection after operations is a menace, probably costing the Health Service £6 million every year. Tonight's programme investigates both the techniques used to prevent infection during an actual operation and research into the causes of infection which still trouble British hospitals.[22]
}}{{Episode list		Title=The Shape of War to Comedf=yes|1967|04|25}}ProdCode=12ShortSummary = Will the next major war be fought with biological and chemical weapons? What are the available weapons? What is the horror they can cause? Is there any moral justification for their use?.[23]
}}{{Episode list		Title=Memorydf=yes|1967|05|09}}ProdCode=13ShortSummary = A man playing chess blindfold against eight opponents, an American worm eating its relatives, an octopus reacting to a scientist's signals in Naples... These arc some of the elements in tonight's investigation of memory. Research on the brain and its workings has recently expanded enormously, producing a record crop of scientific theories. But how near are we yet to any real knowledge of the mysterious processes by which we record, store, and recall our memories?[24]
}}{{Episode list		Title=Masters of the Desertdf=yes|1967|05|23}}ProdCode=14ShortSummary = Today the desert of southern Israel is a barren and arid wilderness, but 2,000 years ago innumerable farms and great cities flourished there. One man, a botanist and amateur archaeologist, Professor Michael Evenari, unearthed the simple yet highly sophisticated methods of water-engineering and cultivation used by these ancient people and applied them himself.
}}{{Episode list		Title=Cancer, The Smoker's Gambledf=yes|1967|06|20}}ProdCode=15ShortSummary = A consultant physician: "In people who smoke twenty cigarettes a day, one death in eight is due to lung cancer". The Financial Times: "Smoking and cancer link still not proved". On the same day as this headline was written one tobacco company's shares rose by 1s 6d. Why is there doubt in so many people's minds about the relationship between lung cancer and smoking? Is it a reasonable doubt? Or is it escapism? Tonight's programme examines the latest scientific evidence in detail.[25]
}}{{Episode list		Title=Science and the Supernaturaldf=yes|1967|07|04}}ProdCode=16ShortSummary = Did Sir William Crookes, later President of the Royal Society, really witness the materialisation of the buxom spirit of Katie King, long-dead daughter of a Caribbean pirate? Do famous experiments performed by parapsychologists prove beyond doubt that telepathy and precognition are scientific fact? Horizon sifts the evidence for and against the existence of such occult phenomena, and invites viewers to participate in an experiment.
}}{{Episode list		Title=Hypnosisdf=yes|1967|07|18}}ProdCode=17ShortSummary = In the minds of many people the word hypnosis conjures up visions of the supernatural, of loss of will-power and self-control. Is this true, and what are the potential dangers, if any? Horizon attempts to clarify the misconceptions and confusions surrounding this emotive subject and investigates some of its present-day uses in medicine. Tonight's programme includes film of a Caesarean operation in which the mother was helped by hypnosis used in conjunction with a general anesthetic - probably for the first time in Britain.
}}

Series 4: 1967–1968

TitleOriginal broadcast dateEpisode{{Episode listTitle=The War of the Boffinsdf=yes|1967|09|12}}ProdCode=1ShortSummary = During the human struggles between the British and German air forces there was a secret war whose battles were lost or won unknown to the public. From 1939 to 1945 Allied and Axis scientists threw their weight into the war knowing that their influence would have enormous consequences for mankind. The secret battles for air supremacy, the inventions, the measures and the countermeasures are part of a story which scientists tell in tonight's programme.[26]
}}{{Episode list		Title=Aspects of Alcoholdf=yes|1967|09|26}}ProdCode=2ShortSummary = A wee dram of C14: A Scottish chemist has recently thought up an unusual application for Scotch whisky: as a measure of radioactive carbon 14 in the atmosphere-including that produced by thermonuclear bomb-testing. One over the eighty: In two weeks' time it will be a criminal offence to have more than eighty milligrams of alcohol per hundred millilitres of blood while in charge of a motor car. What does this level mean? How will the scientific analyses be carried out?[27]
}}{{Episode list		Title=Lords of the Seadf=yes|1967|10|10}}ProdCode=3ShortSummary = Only in recent years have we had the techniques to investigate the depths of the oceans. But we are ill adapted for this new conquest; to us it is a hostile environment. Under water we are inefficient and inadequate compared with the giant fish and the sea mammals whose world it is. Horizon looks at how scientists are helping men enter this new world.[28]
}}{{Episode list		Title=Will Art Last?df=yes|1967|10|24}}ProdCode=4ShortSummary = Titian's painting 'Bacchus and Ariadne' is said to be worth between 12 million and 110 million and is urgently in need of repair. How does a modern restorer set about preserving for a few more centuries a 450-year-old masterpiece?[29]
}}{{Episode list		Title=Air Safety, The Unknown Factordf=yes|1967|11|07}}ProdCode=5ShortSummary = The worst crash in aviation history killed 136 people. In the next decade, jet airliners will carry up to five hundred passengers and fly faster than sound. Their airframes and engines will be tested to the most extreme safety limits. But what of the pilot who will fly these planes? Will we be able to test his ability in this critical job in a comparable fashion?[30]
}}{{Episode list		Title=The Life and Death of the Pine Processionarydf=yes|1967|11|21}}ProdCode=6ShortSummary = An extraordinary film shows the hazardous existence of a caterpillar Thaumetopoea Pityocampa, but the wake of destruction it leaves behind in its struggle for survival has forced French biologists to declare war on the species.[31]
}}{{Episode list		Title=Koestler on Creativitydf=yes|1967|12|05}}ProdCode=7ShortSummary = What were the processes of creativity taking place in the mind of an Einstein formulating relativity? Or of a Shakespeare composing a sonnet? Can experiments on rats or monkeys tell us anything about human behaviour in science and art? Arthur Koestler takes a critical look at some theories of human creativity and puts his own views.[32]
}}{{Episode list		Title=The World of Ted Seriosdf=yes|1967|12|12}}ProdCode=8ShortSummary = An American ex-bell boy, Ted Serios claims to be able to project his thoughts on to film and TV cameras. For five years he has worked with a reputable psychiatrist, and academic staff of Denver University, who believe the phenomenon is genuine; undoubtedly pictures are produced. For two days in the U.S., Horizon filmed Serios trying to convert his thoughts to pictures. Is this a case for science to take seriously? Or is he a trickster?
}}{{Episode list		Title=Professor in Toylanddf=yes|1967|12|24}}ProdCode=9ShortSummary = Some enchanting questions for enquiring minds asked by Professor Julius Sumner Miller on walking toys, singing toys, swimming toys, flying toys. Do you own a toy? Did you ever own a toy? Then Julius (' Walt Disney called me a genius') Sumner Miller can provide a few scientific questions to worry you with.[33]
}}{{Episode list		Title=An Ingenious Man, Sir H. John Bakerdf=yes|1968|01|02}}ProdCode=10ShortSummary = Portrait of Professor Sir John Baker one of this country's most distinguished engineers. It traces his career from his early work on airships in the 1920s, on air-raid shelter design during the war, to his present-day influence on young engineers in his department at Cambridge.[34]
}}{{Episode list		Title=Man's Best Frienddf=yes|1968|01|30}}ProdCode=11ShortSummary = Each year In Britain thousands of strays are destroyed-yet medical research is desperately short of experimental animals. Some American doctors argue that our research is held back by a lack of suitable animals. Is this true? How necessary is vivisection? Is it cruel? Could research still be done without the laboratory animal? Horizon reports tonight from America and Britain on the antivivisection lobby and the medical research that many argue would be impossible without the use of 'man's best friends'.[35]
}}{{Episode list		Title=Once a Junkiedf=yes|1968|02|13}}ProdCode=12ShortSummary = In England addicts get their heroin, and often cocaine, on the National Health Service: our system has prevented the growth of a drug-based criminal world, but Americans say that our system only worked when we did not have a serious addiction problem. Now we do. Does our present system make It too easy for the casual drug experimenter to become a hard-core addict? Is there anything we can learn from the American situation? Horizon, with the guidance of a British psychiatrist, looks at some of the lessons which treatment centres in the U.S. can teach us.[36]
}}{{Episode list		Title=Town Traffic and Tomorrowdf=yes|1968|02|27}}ProdCode=13ShortSummary = The family car is the proudest possession of twentieth - century, town-dwelling man, but we cannot fit it smoothly into our expanding cities. Professor Colin Buchanan shows the overwhelming importance of this gap In town-planning and points to a future that could be liberated by the motor vehicle, or strangled by it.[37]
}}{{Episode list		Title=The Man Makersdf=yes|1968|03|12}}ProdCode=14ShortSummary = The Washkansky heart transplant triggered enormous public concern for the ethics of 'interference' with the human body. But we are at the beginning of a biological revolution where events are bypassing or out-dating today's moral problems. Just how much can we hope to add usefully to the human body? Could a limb or even a brain be transplanted? Can organs be stored so that the life of one man is not dependent on the death of another?.[38]
}}{{Episode list		Title=Man in Search of Himselfdf=yes|1968|03|26}}ProdCode=15ShortSummary = We grow up with the attitude that happiness should be ours by right and when we don't get it we feel personally singled out for ill-treatment. Our cry of anguish is ' Why does this happen to me and why are all the others getting this bliss? ' But are they? A personal view by an eminent social psychiatrist of the pleasures and problems of life in Britain in 1968 in comparison with a very different culture he knows intimately-Hindu village life in Northern India. He looks at some of our deeply rooted beliefs and how they affect our behaviour towards among other things, bereavement, sex, happiness and old-age; and at some of our growing social problems such as the rapidly increasing phenomenon of attempted suicide.[39]
}}{{Episode list		Title=Investigating Murderdf=yes|1968|04|09}}ProdCode=16ShortSummary = In Britain the crime of murder, the most serious of crimes, leads to the most serious punishment. The investigation of murder and the presentation of evidence always demands the utmost care in proving a man's guilt 'beyond all reasonable doubt' for his liberty will depend on it. The certainty and ingenuity of science is helping more and more to establish the outcome of a case. The scientifically trained detective at the scene of the crime, the pathologist in the mortuary, and the biochemist in the laboratory can each supply the piece of the jigsaw that solves the crime, and often a routine scientific test can establish guilt more decisively than half a dozen eye-witnesses.[40]
}}{{Episode list		Title=The Equation of Murderdf=yes|1968|05|07}}ProdCode=17
}}

Series 5: 1968–1969

TitleOriginal broadcast dateEpisode{{Episode listTitle=Lindemann Enigmadf=yes|1968|09|12}}ProdCode=1ShortSummary = Narrated by Christopher Chataway, the episode covered the achievements and failures of Churchill's war-time science advisor Professor Frederick Lindemann.[41]
}}{{Episode list		Title=From Field to Factorydf=yes|1968|09|19}}ProdCode=2ShortSummary = Many farmers think the future lies in the factory farm. This means keeping animals permanently indoors where they can be made to turn food into flesh far more quickly than out in the fields. It has worked with chickens and now it looks like the turn of other animals. Do these methods really work? Do the animals suffer? Horizon looks at some changes that are taking place on the farm.
}}{{Episode list		Title=Comfort on Ageingdf=yes|1968|09|26}}ProdCode=3ShortSummary = Dr. Alex Comfort one of looks into the age-old quest to prolong human life and investigates the latest scientific theories. What is the process taking place in our body that makes us age? Is ageing a kind of clock-mechanism that could be slowed down and how? Can the social scientist do something to change this attitude which leads to our frightening negligence towards old people? Can the biologist-and the British biologist in particular, do something to make our lives longer?
}}{{Episode list		Title=Experiments in Wardf=yes|1968|10|03}}ProdCode=4ShortSummary = Rocketry, electronics, and nuclear bombs have radically changed the outward face of war. Robot missiles automatically seek and destroy their targets while 1,000mph strike planes hedge-hop on radar guidance. But behind the battlefield is a huge sub-structure of research, where a computer can solve tactical problems in seconds, or a new weapon destroy military principles overnight, how far are Britain's defence policies governed by the work of her secret army of scientists on the weapons and techniques of tomorrow?
}}{{Episode list		Title=African Medicinedf=yes|1968|10|17}}ProdCode=5
}}{{Episode list		Title=The Broken Bridgedf=yes|1968|10|24}}ProdCode=6ShortSummary = Narrated by Christopher Chataway, the episode covered the methods of psychiatric therapist, Irene Kassorla[42]
}}{{Episode list		Title=Children Without Wordsdf=yes|1968|10|31}}ProdCode=7ShortSummary = A surprising number of children, bright, perceptive, and apparently normal, seem unable to comprehend language. To some, writing is meaningless and they can never decipher words or numbers. To others, speech has no significance and they react to the spoken word as if they were listening to some incomprehensible tongue. Horizon looks at this seemingly inexplicable phenomenon and attempts to throw some light on the problems facing these children. It shows the work being done to help them, and how they learn to participate in our highly literate society.[43]
}}{{Episode list		Title=Computer Revolutiondf=yes|1968|11|07}}ProdCode=8
}}{{Episode list		Title=Doctor's Dilemmadf=yes|1968|11|14}}ProdCode=9
}}{{Episode list		Title=In the Matter of Dr Alfred Nobeldf=yes|1968|11|21}}ProdCode=10
}}{{Episode list		Title=Wheels Within Wheelsdf=yes|1968|11|28}}ProdCode=11
}}{{Episode list		Title=Black Man – White Sciencedf=yes|1968|12|05}}ProdCode=12
}}{{Episode list		Title=Hidden Worlddf=yes|1968|12|12}}ProdCode=13
}}{{Episode list		Title=The Talgai Skulldf=yes|1968|12|19}}ProdCode=14ShortSummary = The Talgai Skull is the name given to an ancient fossilised skull which was uncovered in a paddock in Southern Queensland in 1886. The skull caused a sensation in scientific circles in 1914, but it is only recently that serious attempts have been made to establish its age. Professor N. W. G. Macintosh, Professor of Anatomy at the University of Sydney, believes the skull could throw light on the origin of the aborigines-to link them with remains of other ancient men found in Java. The first task facing Macintosh was to discover exactly where the skull was found, and the bulk of the film traces the fascinating detective work that went on in the small rural communities of the Darling Downs in Queensland, and the frustrations involved in getting accurate information so long after the event.[44]
}}{{Episode list		Title=Phantasmagoria, The Magic Lanterndf=yes|1968|12|24}}ProdCode=15
}}{{Episode list		Title=Inside Every Fat Man...df=yes|1969|01|02}}ProdCode=16
}}{{Episode list		Title=If Only They Could Speakdf=yes|1969|01|09}}ProdCode=17
}}{{Episode list		Title=The Miraculous Wonder, The Human Eyedf=yes|1969|01|16}}ProdCode=18
}}{{Episode list		Title=The Year of the Locustsdf=yes|1969|01|23}}ProdCode=19
}}{{Episode list		Title=The Gifted Childdf=yes|1969|01|30}}ProdCode=20
}}{{Episode list		Title=The Last of the Polymathsdf=yes|1969|02|06}}ProdCode=21
}}{{Episode list		Title=Music and the Minddf=yes|1969|02|13}}ProdCode=22
}}{{Episode list		Title=Report on V.D.df=yes|1969|02|20}}ProdCode=23
}}{{Episode list		Title=The Drift from Sciencedf=yes|1969|03|06}}ProdCode=24
}}{{Episode list		Title=Powers of Persuasiondf=yes|1969|03|13}}ProdCode=25
}}{{Episode list		Title=The View from Spacedf=yes|1969|03|20}}ProdCode=26
}}{{Episode list		Title=The Unborn Patientdf=yes|1969|03|27}}ProdCode=27
}}{{Episode list		Title=King Solomon's Gardendf=yes|1969|04|10}}ProdCode=28
}}{{Episode list		Title=Muck Today – Poison Tomorrowdf=yes|1969|04|24}}ProdCode=29
}}{{Episode list		Title=Sharkdf=yes|1969|05|01}}ProdCode=30ShortSummary = For divers, seamen, and most often bathers, the word shark in many parts of the world spells danger, sometimes death. Not all species are dangerous, but some are killers. Why is this? At laboratories in the United States and Australia scientists are trying to find the answers. Especially, how are sharks able to detect a swimmer from great distances, and why do they attack some and not others? Tonight Horizon presents an Australian film which examines our attempts to understand one of the oldest inhabitants of the sea, and perhaps learn from the shark how we may live in the ocean environment.
}}{{Episode list		Title=Technology and Self Determinationdf=yes|1969|05|15}}ProdCode=31
}}{{Episode list		Title=After Apollodf=yes|1969|05|22}}ProdCode=32
}}{{Episode list		Title=Discoverydf=yes|1969|05|29}}ProdCode=33
}}{{Episode list		Title=Machines and People, Rt. Hon. A. Wedgwood-Benndf=yes|1969|06|05}}ProdCode=34
}}

Series 6: 1969–1970

TitleOriginal broadcast dateEpisode{{Episode listTitle=Science on Safaridf=yes|1969|09|15}}ProdCode=1
}}{{Episode list		Title=A True Madnessdf=yes|1969|09|22}}ProdCode=2
}}{{Episode list		Title=The Problem of Paindf=yes|1969|09|29}}ProdCode=3
}}{{Episode list		Title=Four Fast Legs and a Nosedf=yes|1969|10|06}}ProdCode=4
}}{{Episode list		Title=Father of the Mandf=yes|1969|10|13}}ProdCode=5
}}{{Episode list		Title=Master of the Microscopedf=yes|1969|10|20}}ProdCode=6
}}{{Episode list		Title=CERNdf=yes|1969|10|27}}ProdCode=7
}}{{Episode list		Title=Cancerdf=yes|1969|11|10}}ProdCode=8
}}{{Episode list		Title=There's a Rhino in My Sugardf=yes|1969|11|17}}ProdCode=9
}}{{Episode list		Title=Fit to Livedf=yes|1969|11|24}}ProdCode=10
}}{{Episode list		Title=Don't Cackle, Lay Eggsdf=yes|1969|12|01}}ProdCode=11
}}{{Episode list		Title=How Much Do You Drink?df=yes|1969|12|08}}ProdCode=12
}}{{Episode list		Title=A Game of Wardf=yes|1969|12|15}}ProdCode=13
}}{{Episode list		Title=Breaddf=yes|1969|12|22}}ProdCode=14
}}{{Episode list		Title=For the Safety of Mankinddf=yes|1969|12|29}}ProdCode=15
}}{{Episode list		Title=Just Another Worlddf=yes|1970|01|05}}ProdCode=16
}}{{Episode list		Title=Henry Royce, Mechanicdf=yes|1970|01|12}}ProdCode=17
}}{{Episode list		Title=A Disease of Our Time, Stressdf=yes|1970|01|19}}ProdCode=18
}}{{Episode list		Title=A Disease of Our Time, Heart Attacksdf=yes|1970|01|26}}ProdCode=19
}}{{Episode list		Title=Sex and Sexualitydf=yes|1970|02|02}}ProdCode=20
}}{{Episode list		Title=Whose Coast?df=yes|1970|02|16}}ProdCode=21
}}{{Episode list		Title=A Much Wanted Childdf=yes|1970|02|23}}ProdCode=22
}}{{Episode list		Title=The Expert Witnessdf=yes|1970|03|02}}ProdCode=23
}}{{Episode list		Title=After the Iron Agedf=yes|1970|03|09}}ProdCode=24
}}{{Episode list		Title=Let the Therapy Fit the Crimedf=yes|1970|03|16}}ProdCode=25
}}{{Episode list		Title=The World Outsidedf=yes|1970|03|23}}ProdCode=26
}}{{Episode list		Title=In the Beginning Was the Worddf=yes|1970|03|30}}ProdCode=27
}}{{Episode list		Title=Drifting of the Continentsdf=yes|1970|04|13}}ProdCode=28
}}{{Episode list		Title=A Case of Prioritydf=yes|1970|04|20}}ProdCode=29
}}{{Episode list		Title=The Fretful Elementsdf=yes|1970|04|27}}ProdCode=30ShortSummary = Covering the physics behind weather patterns and cloud-doctoring experiments.[45]
}}{{Episode list		Title=One Man's Meatdf=yes|1970|05|11}}ProdCode=31
}}{{Episode list		Title=Only Skin Deepdf=yes|1970|07|06}}ProdCode=32
}}{{Episode list		Title=Wolves and Wolfmendf=yes|1970|07|13}}ProdCode=33
}}{{Episode list		Title=A Measure of Uncertaintydf=yes|1970|08|10}}ProdCode=34
}}{{Episode list		Title=The Manhuntersdf=yes|1970|08|17}}ProdCode=35ShortSummary = The family of man began to evolve from the primate order about 15 million years ago but how have we changed since then? Where did we come from; what did our ancestors look like and how did they live? The great detective story has traced our origins back to the extinct ape-man of Africa-probably mankind's earliest pre-human ancestor; from the Transvaal comes the skull of an ape-man child, bearing the marks of a fatal leopard attack made about two million years ago. In a pre-Neanderthal cave in the centre of modern Nice detailed analysis of the patterns of shells, rocks, and bones found on the floor has revealed an exact picture of how man once built his camp there 130,000 years ago. Horizon looks at the work of archaeologists and scientists who are digging for similar evidence of man's earlier. existence on sites in Europe, Africa, Australia, and Asia.
}}{{Episode list		Title=Don't Get Sick in Americadf=yes|1970|08|24}}ProdCode=36ShortSummary = Until now Americans have chosen to receive, and pay for, their medical treatment privately. But in the face of a national shortage of doctors and rapidly rising prices, the private enterprise system seems to be in danger of breaking down. Horizon examines some of the nightmarish situations that have developed in this system, and shows that more and more Americans, fearing illness more for what it might do to their bank balances than to their bodies, are looking enviously at the free universal treatment - for all its shortcomings - enjoyed under national health services like our own.
}}{{Episode list		Title=Crown of Thornsdf=yes|1970|08|31}}ProdCode=37
}}

Series 7: 1970–1971

TitleOriginal broadcast dateEpisode{{Episode listTitle=Noah's Ark in Kensingtondf=yes|1970|09|07}}ProdCode=1ShortSummary = The Natural History Museum is a place of enthusiasts: the hundreds of children who swarm through the public galleries each day and the 350 naturalists employed by the museum. Their job is to look after and do research on one of the largest collections of living organisms in the world. Tonight's programme is a chance to look behind the scenes of a well-known institution. It is also about the public who visit it and the people who work there.
}}{{Episode list		Title=Virusdf=yes|1970|09|14}}ProdCode=2ShortSummary =The present measles epidemic highlights many of the problems of viral disease which face us all. Do you risk the possibility of infection with the danger of permanent disability, even death, or do you use vaccines, the only established preventive, but which in the past have themselves been the cause of severe disablement? This programme weighs the risks and asks: how.safe are the new vaccines and how effective? What are the prospects for chemical cures for viral diseases? And above all, what has happened to the most remarkable drug of all: interferon, discovered in Britain 13 years ago. Horizon reports on a remarkable new series of experiments that may be the turning point in this battle against the viruses that afflict man.
}}{{Episode list		Title=Water, Water...df=yes|1970|09|21}}ProdCode=3ShortSummary =It's almost inconceivable, with our climate, that we should be in danger of a water shortage. Yet some areas already suffer a semi-drought every summer, industrial development is threatened, and the situation is certainly going to get worse. There is, of course, no shortage of rain here, but most of it runs to waste down our rivers, and with land at such a premium the construction of new reservoirs can no longer be expected to match the increasing demand. There are alternatives, numbers of them, but each provides the engineers and scientists with a complexity of problems. Controlling the flow of a river may radically change, even destroy, its wildlife. Placing barrages across our biggest estuaries like the Wash and Morecambe Bay may do the same and more. At Morecambe they are investigating the very real possibility that the ports of Heysham and Barrow-in-Furness may be silted up completely. Horizon looks at the work of our scientists as they try to unravel the problems of providing us with more water.
}}{{Episode list		Title=All Creatures Great and Smalldf=yes|1970|09|28}}ProdCode=4ShortSummary =Do we really know what goes on where 'vivisection' is practised and why these experiments are supposed to be necessary? Do the benefits obtained justify man's using the other animals for his own health and well-being? Horizon shows people on both sides of a very wide gulf - the anti-vivisectionists whose opposition is outspoken, and the scientists who carry out this work but rarely speak out for fear of stirring up even more opposition.
}}{{Episode list		Title=Child for a Lifetimedf=yes|1970|10|05}}ProdCode=5ShortSummary = Thirty thousand children in this country today are mentally subnormal. They will never grow up. Their intelligence has been permanently and profoundly damaged, often without warning and with no known cause. What sort of future can these children expect? This programme examines new techniques which enable such children to overcome low intelligence and master ordinary skills of living. It looks at how psychologists try to solve their learning difficulties in the hope of breaking down the barriers of incomprehension. Horizon reports on the changing outlook for children who are, as one doctor calls them, strangers in their own country.
}}{{Episode list		Title=Something for Our Childrendf=yes|1970|10|12}}ProdCode=6
}}{{Episode list		Title=Million Ton Tankerdf=yes|1970|11|02}}ProdCode=7
}}{{Episode list		Title=The Insect Wardf=yes|1970|11|09}}ProdCode=8ShortSummary = Insecticides are fast becoming redundant, not just because of their severe side effects, but simply because they are fast losing their effectiveness. More and more pests are becoming resistant. So alternatives must be found, and Horizon looks at the efforts both here and abroad to discover and apply them. It's work in which the scientists themselves may seem to display a fiendish cunning as they experiment with techniques that range from subtly interfering with the pest's sex life to a bizarre use of tin foil to fool the ubiquitous aphid. But one fact stands out. The pest problem is nowhere more complicated than in an ordinary British field.
}}{{Episode list		Title=The Savage Minddf=yes|1970|11|16}}ProdCode=9ShortSummary =Among the Yakut Indians the woodpecker is a prized animal. Its blood is used against scrofula; a powder prepared from a mummified woodpecker is used against high fever; contact with the beak is used as a toothache cure. These practices may seem typical of bizarre primitive superstition, but to Professor Claude Levi -Strauss, the French anthropologist, they suggest a process of thinking just as valid as any in civilised medicine. For more than 30 years now, Professor Levi-Strauss has been studying and analysing the mind and behaviour of so-called primitive man. What he has found has turned out to be so subtle and complex that his theories should revolutionise the way that civilised man thinks of himself. In this film portrait Horizon sets out not only to explore some of Lévi-Strauss's theories but also to capture the spirit of the man and his work.
}}{{Episode list		Title=Tanksdf=yes|1970|11|23}}ProdCode=10ShortSummary = Ever since the first landships arrived at the front line in 1916, disguised as water cisterns or 'tanks' they have played a dominant part in land warfare. In their 50-year history from tin-pot adolescence to computerised old age, tanks have demonstrated how military thinking often lags a whole generation behind technology. It took 20 years for the Army to become convinced that tanks had outmoded the cavalry and another 20 to get its design priorities straight. With film never before seen on television, Horizon follows this 50-year history up to the present-a present in which the British Army may have an obsolete weapon on its hands without realising it.
}}{{Episode list		Title=Mind the Machinedf=yes|1970|11|30}}ProdCode=11ShortSummary = Once, machines copied only man's physical activities - now they can mimic many of his mental processes. How long before they can design their own ' intelligent' programmes, how long before they become man's intellectual superior?
}}{{Episode list		Title=Square Pegsdf=yes|1970|12|07}}ProdCode=12ShortSummary = What chance do you have of getting a better job? Today, applying for one often means submitting to innumerable tests not only of ability and intelligence but also of personality. But just how valid are these tests? Horizon examines some of the techniques used by the boom industry of Management Selection and follows two candidates through their ordeal.
}}{{Episode list		Title=Earthquakes, The City That Waits to Diedf=yes|1970|12|14}}ProdCode=13ShortSummary = San Francisco is, literally, a city that waits to die. It faces destruction from an earthquake which, scientists warn, could kill 100,000 people. The earthquake is inevitable and imminent, and yet it's claimed that there has been a scandalous neglect in applying already existing knowledge to reduce hazards. Five thousand children, for example, go to schools sited directly on the actual earthquake faults and in the earthquake predicted those children will be killed. Horizon tells the story of the small group of scientists who, in a struggle against apathy, are trying to save their city. They are also involved in crucial experiments which are already enabling them to predict some earthquakes and which in the near future will enable them to realise the hitherto science-fiction dream of preventing earthquakes.
}}{{Episode list		Title=The Man Who Talks to Frogsdf=yes|1970|12|21}}ProdCode=14
}}{{Episode list		Title=The Gargantuan Triumph of Sciencedf=yes|1970|12|28}}ProdCode=15
}}{{Episode list		Title=Wildlife, The Last Great Battledf=yes|1971|01|04}}ProdCode=16
}}{{Episode list		Title=Great Ormond Streetdf=yes|1971|01|18}}ProdCode=17
}}{{Episode list		Title=A Bulldozer Through Heavendf=yes|1971|01|25}}ProdCode=18
}}{{Episode list		Title=Rumours of Warsdf=yes|1971|02|01}}ProdCode=19
}}{{Episode list		Title=I'm Dependent, You're Addicteddf=yes|1971|02|15}}ProdCode=20
}}{{Episode list		Title=Kuru, To Tremble with Feardf=yes|1971|02|22}}ProdCode=21
}}{{Episode list		Title=Due to Lack of Interest Tomorrow Has Been Cancelleddf=yes|1971|03|08}}ProdCode=22
}}{{Episode list		Title=What Kind of Doctor?df=yes|1971|03|15}}ProdCode=23
}}{{Episode list		Title=A Nice Sort of Accident to Havedf=yes|1971|03|22}}ProdCode=24
}}{{Episode list		Title=The Wooddf=yes|1971|04|05}}ProdCode=25
}}{{Episode list		Title=The Measure of Mandf=yes|1971|04|12}}ProdCode=26
}}{{Episode list		Title=Three Score Years and Then?df=yes|1971|04|26}}ProdCode=27
}}{{Episode list		Title=Darwin's Bulldogdf=yes|1971|05|03}}ProdCode=28
}}{{Episode list		Title=The Secretdf=yes|1971|05|10}}ProdCode=29
}}{{Episode list		Title=What Every Girl Should Knowdf=yes|1971|05|17}}ProdCode=30
}}{{Episode list		Title=Taste of Foods to Comedf=yes|1971|05|24}}ProdCode=31
}}{{Episode list		Title=Looking for a Happy Landingdf=yes|1971|05|31}}ProdCode=32
}}{{Episode list		Title=A Case of Depressiondf=yes|1971|06|07}}ProdCode=33
}}{{Episode list		Title=The Total War Machinedf=yes|1971|06|14}}ProdCode=34
}}{{Episode list		Title=The Dinosaur Huntersdf=yes|1971|06|21}}ProdCode=35
}}

Series 8: 1971–1972

TitleOriginal broadcast dateEpisode{{Episode listTitle=Your Country Needs Youdf=yes|1971|09|27}}ProdCode=1ShortSummary = This week's programme in the series on Man and Science today examines whether our Civil Defence plans - many of them secret - are adequate if Britain ever has to fight a nuclear war. The film contains sequences of secret government and military establishments never before seen on television. Restricted Home Office films to advise the public in the event of war are shown for the first time.[46]
}}{{Episode list		Title=Rheumatismdf=yes|1971|10|04}}ProdCode=2
}}{{Episode list		Title=If at First You Don't Succeed... You Don't Succeeddf=yes|1971|10|11}}ProdCode=3
}}{{Episode list		Title=One Liverpool or Two?df=yes|1971|10|18}}ProdCode=4
}}{{Episode list		Title=Rutherford, Cavendish Todaydf=yes|1971|10|25}}ProdCode=5
}}{{Episode list		Title=The Fierce Peopledf=yes|1971|11|01}}ProdCode=6
}}{{Episode list		Title=The Men Who Painted Cavesdf=yes|1971|11|15}}ProdCode=7
}}{{Episode list		Title=Crab Nebuladf=yes|1971|11|22}}ProdCode=8
}}{{Episode list		Title=Can Venice Survive?df=yes|1971|11|29}}ProdCode=9
}}{{Episode list		Title=Willingly to School?df=yes|1971|12|06}}ProdCode=10
}}{{Episode list		Title=The Periscope Wardf=yes|1971|12|20}}ProdCode=11
}}{{Episode list		Title=Patently Absurddf=yes|1971|12|27}}ProdCode=12
}}{{Episode list		Title=The Missing Linkdf=yes|1972|01|03}}ProdCode=13ShortSummary = According to present plans, you may be able to cross to France by Channel Tunnel in 1978 - official. But after 170 years of hopes and fears in which all plans have been killed by a mixture of claustrophobia and xenophobia, the last major obstacle is a credibility gap. Is it now at last possible that a tunnel will be built?
}}{{Episode list		Title=Navajo, The Last Red Indiansdf=yes|1972|01|10}}ProdCode=14
}}{{Episode list		Title=How Much Do You Smell?df=yes|1972|01|17}}ProdCode=15
}}{{Episode list		Title=Parasite of Paradisedf=yes|1972|01|31}}ProdCode=16
}}{{Episode list		Title=The Day It Rained Periwinklesdf=yes|1972|02|07}}ProdCode=17
}}{{Episode list		Title=Are You Doing This for Me Doctor?df=yes|1972|02|14}}ProdCode=18
}}{{Episode list		Title=How They Sold Doomsdaydf=yes|1972|02|21}}ProdCode=19
}}{{Episode list		Title=For Love or Moneydf=yes|1972|02|28}}ProdCode=20
}}{{Episode list		Title=Whales, Dolphins and Mendf=yes|1972|03|06}}ProdCode=21
}}{{Episode list		Title=What Is Race?df=yes|1972|03|13}}ProdCode=22
}}{{Episode list		Title=Man Made Lakes of Africadf=yes|1972|03|20}}ProdCode=23
}}{{Episode list		Title=Survival in the Saharadf=yes|1972|03|27}}ProdCode=24
}}{{Episode list		Title=Mind over Bodydf=yes|1972|04|10}}ProdCode=25
}}{{Episode list		Title=Out of Volcanoesdf=yes|1972|04|17}}ProdCode=26
}}{{Episode list		Title=The Wizard Who Spat on the Floordf=yes|1972|05|01}}ProdCode=27
}}{{Episode list		Title=Rail Crashdf=yes|1972|05|08}}ProdCode=28ShortSummary = A look at how British Railways has dealt with accidents, accident investigation and safety measures. For every crash, a newer and safer system is put into place to prevent it from happening again.
}}{{Episode list		Title=Do You Dig National Parks?df=yes|1972|05|22}}ProdCode=29
}}{{Episode list		Title=The Rat Man, Sigmund Freuddf=yes|1972|06|05}}ProdCode=30
}}{{Episode list		Title=Sorry I Opened My Mouthdf=yes|1972|06|12}}ProdCode=31
}}{{Episode list		Title=The Ways We Movedf=yes|1972|07|03}}ProdCode=32
}}{{Episode list		Title=The Life That Lives on Mandf=yes|1972|07|10}}ProdCode=33
}}{{Episode list		Title=Sex Can Be a Problemdf=yes|1972|07|24}}ProdCode=34
}}{{Episode list		Title=The Surgery of Violencedf=yes|1972|07|31}}ProdCode=35
}}

Series 9: 1972–1973

TitleOriginal broadcast dateEpisode{{Episode listTitle=Hospital, Episode 1922df=yes|1972|10|12}}ProdCode=1
}}{{Episode list		Title=When Polar Bears Swam in the Thamesdf=yes|1972|10|19}}ProdCode=2ShortSummary=The earliest known fossil remains of a polar bear come from Kew. So, when polar bears swam in the Thames, did Britain really look like present-day Greenland? What was the Ice Age? Was it so long ago? Will it happen again?[47]
}}{{Episode list		Title=Making of an English Landscapedf=yes|1972|10|26}}ProdCode=3
}}{{Episode list		Title=Shadows of Blissdf=yes|1972|11|02}}ProdCode=4
}}{{Episode list		Title=Billion Marshdf=yes|1972|11|09}}ProdCode=5
}}{{Episode list		Title=Do You Sincerely Want a Long Life?df=yes|1972|11|16}}ProdCode=6
}}{{Episode list		Title=The Making of a Natural History Filmdf=yes|1972|11|23}}ProdCode=7ShortSummary=Aired as the first episode of PBS' Nova on 3rd of March, 1974.
}}{{Episode list		Title=Firedf=yes|1972|11|30}}ProdCode=8
}}{{Episode list		Title=Alaskan Pipe Dreamdf=yes|1972|12|07}}ProdCode=9
}}{{Episode list		Title=Their Life in Your Handsdf=yes|1972|12|21}}ProdCode=10
}}{{Episode list		Title=Navigating Europedf=yes|1972|12|28}}ProdCode=11
}}{{Episode list		Title=Epidemicdf=yes|1973|01|04}}ProdCode=12
}}{{Episode list		Title=Worlds in Collisiondf=yes|1973|01|11}}ProdCode=13
}}{{Episode list		Title=The Military Necessitydf=yes|1973|01|18}}ProdCode=14
}}{{Episode list		Title=The Curtain of Silencedf=yes|1973|01|25}}ProdCode=15ShortSummary=Horizon reports on deafness in Britain today, including the provision of aids for the deaf and the dangers of noise induced deafness.
}}{{Episode list		Title=When the Breeding Has to Stopdf=yes|1973|02|08}}ProdCode=16
}}{{Episode list		Title=Science Is Dead, Long Live Sciencedf=yes|1973|02|15}}ProdCode=17
}}{{Episode list		Title=And Where Will the Children Play?df=yes|1973|03|01}}ProdCode=18
}}{{Episode list		Title=Acupuncturedf=yes|1973|03|08}}ProdCode=19
}}{{Episode list		Title=What Time Is Your Body?df=yes|1973|03|22}}ProdCode=20
}}{{Episode list		Title=Survival of the Weakestdf=yes|1973|04|05}}ProdCode=21
}}{{Episode list		Title=Red Sea Coral and the Crown of Thornsdf=yes|1973|04|12}}ProdCode=22
}}{{Episode list		Title=Lumbered... With Back-Ache!df=yes|1973|04|26}}ProdCode=23
}}{{Episode list		Title=Airportdf=yes|1973|05|03}}ProdCode=24ShortSummary = Despite the sophistication of aviation technology, airport safety still depends on a surprisingly small group of people. For this action film Horizon spent a month at London Heathrow - the world's largest, and probably safest, international airport - recording that side of airport activity the passengers never seethe work of those who guard the critical margin between safety and what could prove a national disaster.
}}{{Episode list		Title=Do You Remember the Memory Man?df=yes|1973|05|17}}ProdCode=25
}}{{Episode list		Title=What a Waste!df=yes|1973|05|24}}ProdCode=26
}}{{Episode list		Title=The Laws of the Landdf=yes|1973|06|07}}ProdCode=27
}}{{Episode list		Title=Do We Really Need the Railways?df=yes|1973|06|14}}ProdCode=28ShortSummary = Should we concrete them over, and use them as reserved tracks for high speed buses? Or replace them with 200 mph vehicles, guided, driven and supported by electro-magnets? Britain's railways were the engineering triumph of the industrial revolution but, say some economists, they are outmoded in the 20th century. Other kinds of public transport could be much better value. Horizon takes a realistic look at the new ideas and technologies that threaten our existing railway system - and at the research British Rail is doing to meet the challenge.
}}{{Episode list		Title=The Telly of Tomorrowdf=yes|1973|06|21}}ProdCode=29
}}{{Episode list		Title=How Does It Hurt?df=yes|1973|07|05}}ProdCode=30
}}{{Episode list		Title=A Scientist Looks at Religiondf=yes|1973|08|09}}ProdCode=31
}}

Series 10: 1973–1974

TitleOriginal broadcast dateEpisode{{Episode listTitle=In Search of Konrad Lorenzdf=yes|1973|09|24}}ProdCode=1
}}{{Episode list		Title=Stretch Up Talldf=yes|1973|10|01}}ProdCode=2
}}{{Episode list		Title=Gilding the Lilydf=yes|1973|10|08}}ProdCode=3
}}{{Episode list		Title=Black Holes of Gravitydf=yes|1973|10|15}}ProdCode=4
}}{{Episode list		Title=What's so Big About Us?df=yes|1973|10|22}}ProdCode=5
}}{{Episode list		Title=The Steadfast Tin Soldierdf=yes|1973|10|29}}ProdCode=6
}}{{Episode list		Title=Carry On Smokingdf=yes|1973|11|05}}ProdCode=7
}}{{Episode list		Title=Air Crash Detectivedf=yes|1973|11|26}}ProdCode=8
}}{{Episode list		Title=An Element of Mysterydf=yes|1973|12|03}}ProdCode=9
}}{{Episode list		Title=Digging Up the Futuredf=yes|1973|12|17}}ProdCode=10
}}{{Episode list		Title=Kula, A Reason for Givingdf=yes|1973|12|24}}ProdCode=11
}}{{Episode list		Title=Crime Labdf=yes|1973|12|31}}ProdCode=12
}}{{Episode list		Title=A Matter of Self Defencedf=yes|1974|01|07}}ProdCode=13
}}{{Episode list		Title=Bird Brain, The Mystery of Bird Navigationdf=yes|1974|01|14}}ProdCode=14
}}{{Episode list		Title=Never Too Late to Learndf=yes|1974|01|21}}ProdCode=15
}}{{Episode list		Title=The Great Fish Huntdf=yes|1974|01|28}}ProdCode=16
}}{{Episode list		Title=Pedal Powerdf=yes|1974|02|04}}ProdCode=17
}}{{Episode list		Title=The Writing on the Walldf=yes|1974|02|11}}ProdCode=18
}}{{Episode list		Title=Where Did the Colorado Go?df=yes|1974|02|25}}ProdCode=19ShortSummary=Produced by WGBH-TV in Boston. Aired as a Nova episode, aired on 10 March 1974 on PBS.
}}{{Episode list		Title=The Future Goes Boomdf=yes|1974|03|04}}ProdCode=20
}}{{Episode list		Title=Fusion, The Energy Promisedf=yes|1974|03|11}}ProdCode=21ShortSummary=Controlled nuclear fusion means taming the hydrogen bomb. It could solve the world's energy shortage but it's an enormous engineering challenge. HORIZON looks at the latest fusion machines in the UK and USA.
}}{{Episode list		Title=The First Ten Yearsdf=yes|1974|04|22}}ProdCode=22
}}{{Episode list		Title=This Yankee Dodge Beats Mesmerism Hollowdf=yes|1974|04|29}}ProdCode=23
}}{{Episode list		Title=The Hunting of the Quarkdf=yes|1974|05|06}}ProdCode=24
}}{{Episode list		Title=A Noah's Ark for Europedf=yes|1974|05|13}}ProdCode=25
}}{{Episode list		Title=Bridges, When It Comes to the Crunchdf=yes|1974|06|03}}ProdCode=26
}}{{Episode list		Title=Search for Lifedf=yes|1974|06|10}}ProdCode=27
}}{{Episode list		Title=The Secrets of Sleepdf=yes|1974|06|17}}ProdCode=28
}}{{Episode list		Title=Who Needs Skill?df=yes|1974|06|24}}ProdCode=29ShortSummary=Documentary examining the role manual skills play in modern industry. Industries featured are Nuclear engineering, Shipbuilding, Steel production. Skilled machinists and welders talk frankly about how they feel their skills are valued.
}}{{Episode list		Title=Hills of Promisedf=yes|1974|07|01}}ProdCode=30
}}{{Episode list		Title=The Race for the Double Helixdf=yes|1974|07|08}}ProdCode=31
}}{{Episode list		Title=The Immigrant Doctorsdf=yes|1974|07|15}}ProdCode=32
}}{{Episode list		Title=Mines Minerals and Mendf=yes|1974|07|22}}ProdCode=33
}}{{Episode list		Title=What Price Steak?df=yes|1974|07|29}}ProdCode=34
}}{{Episode list		Title=Listen and Be Loyaldf=yes|1974|08|05}}ProdCode=35
}}{{Episode list		Title=Adam or Eve?df=yes|1974|08|19}}ProdCode=36
}}

Series 11: 1974–1975

TitleOriginal broadcast dateEpisode{{Episode listTitle=An Unholy Scrambledf=yes|1974|09|02}}ProdCode=1
}}{{Episode list		Title=You Do as You Are Tolddf=yes|1974|10|28}}ProdCode=2
}}{{Episode list		Title=The First Signs of Washoedf=yes|1974|11|04}}ProdCode=3ShortSummary=Re-narrated Nova episode, first aired on PBS in May 1974.
}}{{Episode list		Title=The Other Waydf=yes|1974|11|11}}ProdCode=4
}}{{Episode list		Title=The Greatest Advance Since the Wheeldf=yes|1974|11|25}}ProdCode=5
}}{{Episode list		Title=Joeydf=yes|1974|12|09}}ProdCode=6
}}{{Episode list		Title=The Neglected Harvestdf=yes|1974|12|16}}ProdCode=7
}}{{Episode list		Title=How on Earth Did They Do That?df=yes|1974|12|23}}ProdCode=8
}}{{Episode list		Title=The Lysenko Affairdf=yes|1974|12|30}}ProdCode=9
}}{{Episode list		Title=The Cleanest Place in the Worlddf=yes|1975|01|06}}ProdCode=10
}}{{Episode list		Title=The Killer Dustdf=yes|1975|01|20}}ProdCode=11
}}{{Episode list		Title=A Time to Be Borndf=yes|1975|01|27}}ProdCode=12ShortSummary=Horizon investigates the growing tendency in hospitals to induce childbirth by injecting hormones into mothers.
}}{{Episode list		Title=The Unsafe Seadf=yes|1975|02|10}}ProdCode=13
}}{{Episode list		Title=The Change of Lifedf=yes|1975|02|17}}ProdCode=14
}}{{Episode list		Title=Project Fidodf=yes|1975|02|24}}ProdCode=15
}}{{Episode list		Title=The Planetsdf=yes|1975|03|10}}ProdCode=16
}}{{Episode list		Title=The Long Long Walkaboutdf=yes|1975|04|07}}ProdCode=17
}}{{Episode list		Title=The Overworked Miracledf=yes|1975|04|14}}ProdCode=18
}}{{Episode list		Title=Not the Cheapest but the Bestdf=yes|1975|04|21}}ProdCode=19
}}{{Episode list		Title=A Spoonful of Roughagedf=yes|1975|04|28}}ProdCode=20
}}{{Episode list		Title=Brain Poisondf=yes|1975|05|05}}ProdCode=21
}}{{Episode list		Title=The Bulldog's Last Bark?df=yes|1975|05|12}}ProdCode=22
}}{{Episode list		Title=Benjamindf=yes|1975|05|19}}ProdCode=23
}}{{Episode list		Title=The Mcmaster Experimentdf=yes|1975|06|02}}ProdCode=24
}}{{Episode list		Title=The Glazed Outlookdf=yes|1975|06|09}}ProdCode=25
}}{{Episode list		Title=The Three Chord Trickdf=yes|1975|06|16}}ProdCode=26
}}{{Episode list		Title=Strange Sleepdf=yes|1975|06|30}}ProdCode=27
}}{{Episode list		Title=How Do You Read?df=yes|1975|07|14}}ProdCode=28
}}{{Episode list		Title=The Sickly Seadf=yes|1975|07|21}}ProdCode=29
}}{{Episode list		Title=Happy Catastrophedf=yes|1975|07|28}}ProdCode=30
}}{{Episode list		Title=To Die – To Live, The Survivors of Hiroshimadf=yes|1975|08|06}}ProdCode=31
}}{{Episode list		Title=Cannabisdf=yes|1975|08|11}}ProdCode=32
}}{{Episode list		Title=Meditation and the Minddf=yes|1975|08|18}}ProdCode=33
}}

Series 12: 1975–1976

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Trobriand Experimentdf=yes|1975|12|29}}ProdCode=1
}}{{Episode list		Title=The Transplant Experiencedf=yes|1976|01|05}}ProdCode=2
}}{{Episode list		Title=Intimate Strangersdf=yes|1976|01|12}}ProdCode=3
}}{{Episode list		Title=A Fair Share of What Little We Havedf=yes|1976|01|19}}ProdCode=4
}}{{Episode list		Title=The Incredible Machinedf=yes|1976|01|26}}ProdCode=5
}}{{Episode list		Title=King Coal Reviveddf=yes|1976|02|02}}ProdCode=6
}}{{Episode list		Title=A Question of Trustdf=yes|1976|02|09}}ProdCode=7
}}{{Episode list		Title=The Case of the Bermuda Triangledf=yes|1976|02|16}}ProdCode=8
}}{{Episode list		Title=The Lords of the Labyrinthdf=yes|1976|02|23}}ProdCode=9
}}{{Episode list		Title=Inside the Sharkdf=yes|1976|03|01}}ProdCode=10
}}{{Episode list		Title=The Chemical Dreamdf=yes|1976|03|08}}ProdCode=11
}}{{Episode list		Title=The Edelin Affairdf=yes|1976|03|15}}ProdCode=12
}}{{Episode list		Title=The World of Margaret Meaddf=yes|1976|03|22}}ProdCode=13
}}{{Episode list		Title=The Pathway from Madnessdf=yes|1976|03|29}}ProdCode=14
}}{{Episode list		Title=Geronimo's Childrendf=yes|1976|04|05}}ProdCode=15
}}{{Episode list		Title=The Vision of the Blinddf=yes|1976|04|12}}ProdCode=16
}}{{Episode list		Title=A Lesson for Teacherdf=yes|1976|04|26}}ProdCode=17
}}{{Episode list		Title=Why Did Stuart Die?df=yes|1976|05|03}}ProdCode=18
}}{{Episode list		Title=The Children of Perudf=yes|1976|05|17}}ProdCode=19
}}{{Episode list		Title=Dyingdf=yes|1976|05|24}}ProdCode=20
}}{{Episode list		 Title = The Great British Droughtdf=yes|1976|05|26}} ProdCode = — ShortSummary = Documentary on the likely effects of the drought in Britain.
}}{{Episode list		Title=A Home Like Ours..., A Story of Four Childrendf=yes|1976|06|07}}ProdCode=21
}}{{Episode list		Title=What's Wrong with the Sun?df=yes|1976|06|14}}ProdCode=22
}}

Series 13: 1976–1977

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Bull's-Eye Wardf=yes|1976|10|25}}ProdCode=1
}}{{Episode list		Title=The Hot-Blooded Dinosaursdf=yes|1976|11|01}}ProdCode=2
}}{{Episode list		Title=Billion Dollar Bubbledf=yes|1976|11|08}}ProdCode=3
}}{{Episode list		Title=The Selfish Genedf=yes|1976|11|15}}ProdCode=4
}}{{Episode list		Title=A Child of Our Owndf=yes|1976|11|22}}ProdCode=5
}}{{Episode list		Title=Secrets of a Coral Islanddf=yes|1976|11|29}}ProdCode=6
}}{{Episode list		Title=The Long Valleydf=yes|1976|12|06}}ProdCode=7
}}{{Episode list		Title=Half-Way to 1984df=yes|1976|12|13}}ProdCode=8
}}{{Episode list		Title=The Mystery of King Arthur and His Round Tabledf=yes|1976|12|20}}ProdCode=9
}}{{Episode list		Title=A Smile for the Crocodiledf=yes|1977|01|07}}ProdCode=10
}}{{Episode list		Title=The Pill for the Peopledf=yes|1977|01|14}}ProdCode=11
}}{{Episode list		Title=The Ape That Stood Updf=yes|1977|01|21}}ProdCode=12
}}{{Episode list		Title=The Human Animaldf=yes|1977|02|04}}ProdCode=13
}}{{Episode list		Title=The Guinea Pig and the Lawdf=yes|1977|02|18}}ProdCode=14ShortSummary=How are animal experiments carried out in Britain and what would be at risk if they were controlled more strictly?
}}{{Episode list		Title=Hunters of the Sealdf=yes|1977|02|25}}ProdCode=15
}}{{Episode list		Title=The Red Planetdf=yes|1977|03|04}}ProdCode=16
}}{{Episode list		Title=One of Nature's Hotelsdf=yes|1977|03|11}}ProdCode=17
}}{{Episode list		Title=Dawn of the Solar Agedf=yes|1977|03|18}}ProdCode=18
}}{{Episode list		Title=Genetic Roulettedf=yes|1977|04|01}}ProdCode=19
}}{{Episode list		Title=The Amazing Doctor Newtondf=yes|1977|07|15}}ProdCode=20
}}{{Episode list		Title=The Trouble with Medicinedf=yes|1977|07|22}}ProdCode=21
}}{{Episode list		Title=Silent Speechdf=yes|1977|07|29}}ProdCode=22
}}{{Episode list		Title=The Green Machinedf=yes|1977|08|05}}ProdCode=23
}}{{Episode list		Title=Horizon 2002df=yes|1977|08|26}}ProdCode=24
}}

Series 14: 1977–1978

TitleOriginal broadcast dateEpisode{{Episode listTitle=The River That Came Cleandf=yes|1977|09|02}}ProdCode=1
}}{{Episode list		Title=Blueprints in the Bloodstreamdf=yes|1977|09|09}}ProdCode=2
}}{{Episode list		Title=40 Years of Murderdf=yes|1977|09|16}}ProdCode=3
}}{{Episode list		 Title = Darwin's Dreamdf=yes|1977|09|23}} ProdCode = —
}}{{Episode list		Title=The Cry for Helpdf=yes|1977|09|30}}ProdCode=4
}}{{Episode list		Title=The Sunspot Mysterydf=yes|1977|10|07}}ProdCode=5
}}{{Episode list		Title=The Rhine's Revengedf=yes|1977|10|21}}ProdCode=6
}}{{Episode list		 Title = The Case of the Ancient Astronautsdf=yes|1977|11|25}} ProdCode = — ShortSummary = Horizon investigates whether first contact with aliens has already occurred. The publication of 'Chariots of the Gods?' by Erich von Daniken is central to this documentary and some of von Daniken's claims of evidence of extra-terrestrial visitations, such as the Palenque slab, the Nazca lines, Easter Island Moai and the Great Pyramid of Giza are investigated and debunked by archeologists including Thor Heyerdahl. It concludes that von Daniken's thesis relies on unrelated facts, false similarities and phoney evidence. Available as a PBS' NOVA episode, released in 1978. U.S. narration by Don Wescott.
}}{{Episode list		Title=Icarus' Childrendf=yes|1977|12|02}}ProdCode=7
}}{{Episode list		Title=The Healing Nightmaredf=yes|1977|12|09}}ProdCode=8
}}{{Episode list		Title=The Great Wine Revolutiondf=yes|1977|12|23}}ProdCode=9
}}{{Episode list		Title=Living Machinesdf=yes|1978|01|06}}ProdCode=10
}}{{Episode list		Title=A Land for All Reasonsdf=yes|1978|01|20}}ProdCode=11
}}{{Episode list		Title=I Don't Want to Be a Burdendf=yes|1978|01|27}}ProdCode=12
}}{{Episode list		Title=Zero Gdf=yes|1978|02|03}}ProdCode=13ShortSummary=Documentary about the physiological and psychological effects of living in a zero-g space station, built around NASA library film from Project Skylab. Skylab astronauts and other experts discuss the ultimate limitation on spaceflight duration, as well as the exhilaration of being free of gravity.
}}{{Episode list		Title=The Message in the Rocksdf=yes|1978|02|17}}ProdCode=14
}}{{Episode list		Title=The Eddystone Lightsdf=yes|1978|02|24}}ProdCode=15
}}{{Episode list		Title=Light of the 21st Centurydf=yes|1978|03|10}}ProdCode=16
}}{{Episode list		Title=The New Breadlinedf=yes|1978|03|24}}ProdCode=17
}}{{Episode list		Title=Now the Chips are Downdf=yes|1978|03|31}}ProdCode=18ShortSummary=Horizon examines the rise of the microprocessor and asks if automation presents a problem for the future of British industry.
}}{{Episode list		Title=Explosions in the Minddf=yes|1978|07|14}}ProdCode=19
}}{{Episode list		Title=One Small Stepdf=yes|1978|07|21}}ProdCode=20
}}{{Episode list		Title=The Tsetse Trapdf=yes|1978|07|28}}ProdCode=21
}}{{Episode list		Title=A Whisper from Spacedf=yes|1978|08|04}}ProdCode=22
}}{{Episode list		Title=Prisoners of Hopedf=yes|1978|08|11}}ProdCode=23
}}{{Episode list		Title=On a Different Trackdf=yes|1978|08|18}}ProdCode=24
}}{{Episode list		Title=Careering into Sciencedf=yes|1978|08|25}}ProdCode=25
}}

Series 15: 1978–1979

TitleOriginal broadcast dateEpisode{{Episode listTitle=Cashing In on the Oceandf=yes|1978|09|01}}ProdCode=1ShortSummary=Manganese nodules carpet parts of the deep ocean floor. They're potentially a highly valuable source of minerals. Horizon looks at the engineering challenge of harvesting them, and the knotty problems such a venture would pose for international law.
}}{{Episode list		Title=Bags of Lifedf=yes|1978|09|08}}ProdCode=2
}}{{Episode list		Title=Innocent Slaughter?df=yes|1978|09|15}}ProdCode=3
}}{{Episode list		Title=Beersheva Experimentdf=yes|1978|11|03}}ProdCode=4
}}{{Episode list		Title=Divers Do It Deeperdf=yes|1978|11|10}}ProdCode=5
}}{{Episode list		Title=The Big Sleepdf=yes|1978|11|17}}ProdCode=6ShortSummary=A look at the world's leading hibernation research projects shows that the apparently simple business of dozing off for the winter is, in fact, an extremely difficult trick to learn. The only hope is that the whole process is triggered by a special 'hibernation hormone'. It hasn't been found yet, but more than one laboratory is hot on the trail.
}}{{Episode list		Title=The Vital Sparkdf=yes|1978|11|24}}ProdCode=7
}}{{Episode list		Title=The Red Deer of Rhumdf=yes|1978|12|29}}ProdCode=8
}}{{Episode list		Title=The Forever Fueldf=yes|1979|02|26}}ProdCode=9
}}{{Episode list		Title=In Search of Pegasusdf=yes|1979|03|05}}ProdCode=10
}}{{Episode list		Title=The Keys of Paradisedf=yes|1979|03|12}}ProdCode=11
}}{{Episode list		Title=Sweet Solutionsdf=yes|1979|03|19}}ProdCode=12
}}{{Episode list		Title=Bronze Age Blast-Offdf=yes|1979|03|26}}ProdCode=13
}}{{Episode list		Title=The Real Bionic Mandf=yes|1979|04|02}}ProdCode=14ShortSummary=The opening title of the TV series Six million dollar Man is an actual crash, of the M2-F2 lifting body. HORIZON interviews the pilot, Bruce Peterson, and looks at progress in creating artificial limbs and organs.
}}{{Episode list		Title=A Mediterranean Prospectdf=yes|1979|04|09}}ProdCode=15
}}{{Episode list		Title=Elements of Riskdf=yes|1979|04|23}}ProdCode=16
}}{{Episode list		Title=Mr Ludwig's Tropical Dreamlanddf=yes|1979|04|30}}ProdCode=17
}}{{Episode list		Title=Where Nothing Happens Twicedf=yes|1979|05|07}}ProdCode=18
}}{{Episode list		Title=Journey Through the Human Bodydf=yes|1979|05|14}}ProdCode=19ShortSummary= Imagine yourself shrunk to less than a millimetre, travelling down a blood vessel. It's a popular science-fiction idea but. tonight, Horizon takes you on such a journey. We travel inside the main arteries of the body and past the narrow capillaries of the skin where red blood cells must flow in single file. We go along the carotid artery into the delicate tracery of the brain and down into the massive cavity of the heart itself. We see the biological processes at work within the body and explore the changes within the arteries that can lead to the heart failures and strokes which take the lives of 100,000 Britons every year. The voyage is made possible by the unique camera techniques developed by Swedish photographer Dr Lennart Nilsson. Ten years ago his images of the developing foetus in the womb brought him international recognition. In this film he documents another hidden world - the surprisingly beautiful one within our body's arterial system.
}}{{Episode list		Title=The Fight to Be Maledf=yes|1979|05|21}}ProdCode=20
}}{{Episode list		Title=The Robots Are Comingdf=yes|1979|05|28}}ProdCode=21
}}

Series 16: 1979–1980

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Mexican Oil Dancedf=yes|1979|09|24}}ProdCode=1ShortSummary=Mexico, the lazy land of the sombrero and siesta, is fast becoming a country of hard-hats and hard work. The recent discovery of huge oil fields in the southern states of Mexico has stirred the government and people to unprecedented efforts. Could Mexico turn out to be another Kuwait? As exploration for new oil expands, could the country eventually match the giant reserves of the world's top producer, Saudi Arabia? Horizon investigates what effect Mexico might have on an oil hungry world-and the effect of oil on Mexico and the Mexicans themselves. Mexico is already exporting oil - some of it by accident. The world's worst-ever oil spill, from a rig in the Gulf of Campeche. is a major threat to the Texas coast-line and to the already delicate nature of US/Mexican relations.
}}{{Episode list		Title=Tracks on the Oregon Traildf=yes|1979|10|01}}ProdCode=2
}}{{Episode list		Title=The Race to Re-Shape Carsdf=yes|1979|10|08}}ProdCode=3
}}{{Episode list		Title=Dragnet for Diabetesdf=yes|1979|10|15}}ProdCode=4
}}{{Episode list		Title=Lost Waters of the Niledf=yes|1979|10|22}}ProdCode=5
}}{{Episode list		Title=Survival of the Fastestdf=yes|1979|10|29}}ProdCode=6
}}{{Episode list		Title=A Touch of Sensitivitydf=yes|1979|11|05}}ProdCode=7
}}{{Episode list		Title=A Treasury of Treesdf=yes|1979|11|12}}ProdCode=8
}}{{Episode list		Title=Darkness Visibledf=yes|1979|11|19}}ProdCode=9
}}{{Episode list		Title=Uranium Goes Criticaldf=yes|1979|12|03}}ProdCode=10
}}{{Episode list		Title=The Fat in the Firedf=yes|1979|12|10}}ProdCode=11
}}{{Episode list		Title=Decadedf=yes|1979|12|17}}ProdCode=12ShortSummary=As we move into the 80s, Horizon takes a final look over its shoulder at the last ten years. Our guide is Gordon Rattray Taylor, the original Editor of Horizon. It's been a decade of contrasts; Concorde and man-powered flight, test-tube babies and abortion, nuclear reactors and solar roofs, micro-processors and meditation. The 70s opened with men walking on the moon. It ends with an energy crisis, inflation and unemployment.
}}{{Episode list		Title=Ghost of the Amoco Cadizdf=yes|1980|01|14}}ProdCode=13
}}{{Episode list		Title=You Are Old, Father Williamdf=yes|1980|01|21}}ProdCode=14
}}{{Episode list		 Title = The Mind's Eyedf=yes|1980|01|28}} ProdCode = —
}}{{Episode list		Title=Cleared for Take Offdf=yes|1980|02|04}}ProdCode=15
}}{{Episode list		Title=A Sporting Chancedf=yes|1980|02|11}}ProdCode=16
}}{{Episode list		Title=The Cancer Detectives of Lin Xiandf=yes|1980|02|18}}ProdCode=17
}}{{Episode list		Title=The Big Ifdf=yes|1980|02|25}}ProdCode=18
}}{{Episode list		Title=Cash from Trashdf=yes|1980|03|03}}ProdCode=19ShortSummary=Roundup of efforts to recycle more of our waste, narrated by Tony Britton.
}}{{Episode list		Title=Encounter with Jupiterdf=yes|1980|03|10}}ProdCode=20
}}{{Episode list		Title=Portrait of a Poisondf=yes|1980|03|17}}ProdCode=21
}}{{Episode list		Title=Magnet Earthdf=yes|1980|03|24}}ProdCode=22
}}

Series 17: 1980–1981

TitleOriginal broadcast dateEpisode{{Episode listTitle=Goodbye Gutenbergdf=yes|1980|09|01}}ProdCode=1ShortSummary=In Japan the development of a voice-controlled word processor will revolutionise their offices. In Sweden 'text inspectors' have to check on any illegal entries on computer files. In the USA the way information is filtered to the President in the White House is radically changing. In Britain Prestel can supply all kinds of information into homes and offices. Horizon examines some of the more far-reaching and subtle effects of the new information age. We ask: Can we foresee any of the cultural changes that lie ahead?[48]
}}{{Episode list		Title=Invasion of the Virionsdf=yes|1980|09|08}}ProdCode=2
}}{{Episode list		Title=Beyond the Milky Waydf=yes|1980|09|15}}ProdCode=3
}}{{Episode list		Title=Little Boxesdf=yes|1980|09|22}}ProdCode=4
}}{{Episode list		Title=The Other Kenyadf=yes|1980|09|29}}ProdCode=5
}}{{Episode list		Title=Moving Stilldf=yes|1980|10|06}}ProdCode=6
}}{{Episode list		Title=The Way Outdf=yes|1980|10|13}}ProdCode=7
}}{{Episode list		Title=The Dead Sea Livesdf=yes|1980|10|20}}ProdCode=8
}}{{Episode list		Title=Once in a Million Yearsdf=yes|1980|10|27}}ProdCode=9
}}{{Episode list		Title=Smokers' Luckdf=yes|1980|11|03}}ProdCode=10
}}{{Episode list		Title=Behind the Horoscopedf=yes|1980|11|10}}ProdCode=11
}}{{Episode list		Title=The Mondragon Experimentdf=yes|1980|11|17}}ProdCode=12
}}{{Episode list		Title=The Spikedf=yes|1980|11|24}}ProdCode=13
}}{{Episode list		Title=The Slatemakersdf=yes|1980|12|01}}ProdCode=14
}}{{Episode list		Title=Anatomy of a Volcanodf=yes|1980|12|15}}ProdCode=15ShortSummary=When Mount St. Helens erupted last May, it did much more damage than geologists had expected. Horizon looks at the aftermath of the devastating explosion, and at the beginnings of environmental recovery.
}}{{Episode list		Title=Spend and Prosperdf=yes|1981|01|05}}ProdCode=16ShortSummary = Horizon presents a portrait of renowned economist John Maynard Keynes. It follows his life story, his ideas on economics and his contributions to the arts.
}}{{Episode list		Title=A Whole New Medicinedf=yes|1981|01|12}}ProdCode=17
}}{{Episode list		Title=The Qualyub Projectdf=yes|1981|01|19}}ProdCode=18
}}{{Episode list		Title=No One Will Take Me Seriouslydf=yes|1981|01|26}}ProdCode=19
}}{{Episode list		Title=Living with Dyingdf=yes|1981|02|02}}ProdCode=20
}}{{Episode list		Title=A Is for Atom, B Is for Bombdf=yes|1981|02|09}}ProdCode=21
}}{{Episode list		Title=Who Will Deliver Your Baby?df=yes|1981|02|16}}ProdCode=22
}}{{Episode list		Title=West of Bangaloredf=yes|1981|03|02}}ProdCode=23
}}{{Episode list		Title=Gentlemen, Lift Your Skirtsdf=yes|1981|03|09}}ProdCode=24
}}{{Episode list		Title=Hello Universe!df=yes|1981|03|16}}ProdCode=25
}}{{Episode list		Title=Voices from Silent Handsdf=yes|1981|03|23}}ProdCode=26
}}{{Episode list		Title=Did Darwin Get It Wrong?df=yes|1981|03|30}}ProdCode=27
}}{{Episode list		Title=East of Bombaydf=yes|1981|04|06}}ProdCode=28
}}{{Episode list		Title=Resolution on Saturn, 1: The Ringsdf=yes|1981|04|11}}ProdCode=29
}}{{Episode list		Title=Resolution on Saturn, 2: The Moonsdf=yes|1981|04|13}}ProdCode=30
}}

Series 18: 1981–1982

TitleOriginal broadcast dateEpisode{{Episode listTitle=Heads I Win, Tails You Losedf=yes|1981|09|28}}ProdCode=1ShortSummary = A hang-glider pilot, a miner and a lorry driver-they all happily accept risks every day, but now they are threatened with a nuclear power station on their doorsteps. Yet according to the experts, they have no need to worry, as the risk is minute compared with the hazards in their normal lives. How accurate are the experts' figures, and why is it that people nevertheless do not believe that a nuclear power station, or a petrochemical complex like Canvey Island is safe? No major technological undertaking is completely without risk. But how are governments to decide what is an 'acceptable' risk, one that is seen to be fair and justifiable by the majority of the population?[49]
}}{{Episode list		Title=The Hunt for the Legion Killerdf=yes|1981|10|05}}ProdCode=2
}}{{Episode list		Title=Breaking in Childrendf=yes|1981|10|12}}ProdCode=3
}}{{Episode list		Title=The Griddf=yes|1981|10|19}}ProdCode=4
}}{{Episode list		Title=Butterflies or Barley?df=yes|1981|10|26}}ProdCode=5
}}{{Episode list		Title=Science for the Peopledf=yes|1981|11|02}}ProdCode=6
}}{{Episode list		Title=The Race to Ruindf=yes|1981|11|09}}ProdCode=7
}}{{Episode list		Title=Death of the Dinosaursdf=yes|1981|11|16}}ProdCode=8
}}{{Episode list		Title=Feynman, The Pleasure of Finding Things Outdf=yes|1981|11|23}}ProdCode=9ShortSummary = Richard Feynman talks about his life.
}}{{Episode list		Title=The Cornucopiadf=yes|1981|11|30}}ProdCode=10
}}{{Episode list		Title=A Race Against Timedf=yes|1981|12|07}}ProdCode=11
}}{{Episode list		Title=Painting by Numbersdf=yes|1981|12|21}}ProdCode=12ShortSummary = Horizon investigates the current state of computer and analogue graphics by interviewing assists and scientists involved with scientific and technical modelling, 3D movie animation, and computer gaming.
}}{{Episode list		Title=The Secret of the Snakedf=yes|1982|01|11}}ProdCode=13
}}{{Episode list		Title=Finding a Voicedf=yes|1982|01|18}}ProdCode=14
}}{{Episode list		Title=The Sea Behind the Dunesdf=yes|1982|01|25}}ProdCode=15
}}{{Episode list		Title=Whatever Happened to the Energy Crisis?df=yes|1982|02|01}}ProdCode=16
}}{{Episode list		Title=Notes of a Biology Watcherdf=yes|1982|02|08}}ProdCode=17
}}{{Episode list		Title=The Cline Affairdf=yes|1982|02|15}}ProdCode=18
}}{{Episode list		Title=The Million Murdering Deathdf=yes|1982|02|22}}ProdCode=19
}}{{Episode list		Title=Shots in the Darkdf=yes|1982|03|01}}ProdCode=20
}}{{Episode list		Title=The Victimsdf=yes|1982|03|08}}ProdCode=21
}}{{Episode list		Title=The Future-Made in Japan?df=yes|1982|03|15}}ProdCode=22
}}{{Episode list		Title=The Private Face of Medicinedf=yes|1982|03|22}}ProdCode=23
}}{{Episode list		Title=The Fatal Bargaindf=yes|1982|04|05}}ProdCode=24
}}

Series 19: 1982–1983

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Miracle of Lifedf=yes|1982|10|11}}ProdCode=1
}}{{Episode list		Title=The Case of the UFOsdf=yes|1982|10|18}}ProdCode=2ShortSummary = Unidentified flying objects - UFOs - exist. The question is: what are they? In most cases those who see UFOs are not mad or drunk, but responsible adults who are sincerely convinced that they have witnessed something very strange. And the sightings are not just visual - UFOs have been photographed, filmed and tracked on radar. So are these sightings evidence of spacecraft from other worlds-or of something more down to Earth? Tonight's programme examines some of the more classic UFO cases and comes up with at least one rather startling possibility.[50]
}}{{Episode list		Title=A Killing Raindf=yes|1982|10|25}}ProdCode=3
}}{{Episode list		Title=Intimate Relationsdf=yes|1982|11|01}}ProdCode=4
}}{{Episode list		Title=The Scientist and the Babydf=yes|1982|11|08}}ProdCode=5
}}{{Episode list		Title=Brave New Babies?df=yes|1982|11|15}}ProdCode=6
}}{{Episode list		Title=The Professor of Surgerydf=yes|1982|11|29}}ProdCode=7
}}{{Episode list		Title=The Chopperdf=yes|1982|12|06}}ProdCode=8
}}{{Episode list		Title=The State of the Planetdf=yes|1982|12|13}}ProdCode=9
}}{{Episode list		Title=The Mysterious Mr Tesladf=yes|1982|12|20}}ProdCode=10
}}{{Episode list		 Title = 25 Years in Spacedf=yes|1982|12|25}} ProdCode =— ShortSummary = A history of space exploration starting from the dawn of the space age in 1957 with the launch of Sputnik to the Space Shuttle Columbia. Mainly using excerpts from newsreels and television programmes the story covers Laika, Jupiter-C, Yuri Gagarin, Alan Shepard, John Glenn, Alexei Leonov, Ed White, Apollo 1, Vladimir Komarov, Apollo 8, Apollo 10, Apollo 11, Apollo 13, Apollo 17, Skylab, Salyut, and Voyager 1. It includes interviews and broadcasts from Sir Bernard Lovell, James Burke, Frank Borman, Brian Aldiss, Hugh Trevor-Roper, Barbara Ward, Carl Sagan, and Patrick Moore.
}}{{Episode list		Title=Sizewell Under Pressuredf=yes|1983|01|10}}ProdCode=11
}}{{Episode list		Title=Tropical Time Machinedf=yes|1983|01|17}}ProdCode=12
}}{{Episode list		Title=The Geneva Eventdf=yes|1983|01|24}}ProdCode=13
}}{{Episode list		Title=How Much Can You Drink?df=yes|1983|02|07}}ProdCode=14
}}{{Episode list		Title=Talking Turtledf=yes|1983|02|14}}ProdCode=15
}}{{Episode list		Title=What Little Girls Are Made Ofdf=yes|1983|02|21}}ProdCode=16
}}{{Episode list		Title=British Science – On the Wrong Track?df=yes|1983|02|28}}ProdCode=17
}}{{Episode list		Title=The Great Plains Massacredf=yes|1983|03|07}}ProdCode=18
}}{{Episode list		Title=Hard Rockdf=yes|1983|03|14}}ProdCode=19
}}{{Episode list		Title=Better Mind the Computerdf=yes|1983|03|21}}ProdCode=20
}}{{Episode list		Title=Madness on Trialdf=yes|1983|04|11}}ProdCode=21
}}{{Episode list		Title=Sixty Minutes to Meltdowndf=yes|1983|04|18}}ProdCode=22
}}{{Episode list		Title=Killer in the Villagedf=yes|1983|04|25}}ProdCode=23ShortSummary=Horizon traces the spread of a newly identified disease, AIDS, across America.
}}

Series 20: 1983–1984

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Case of E.S.P.df=yes|1983|09|26}}ProdCode=1ShortSummary=Is it possible to read someone's mind or foretell the future? Do some people have psychic powers or a sixth sense? Most scientists would emphatically say no, and that the many people who believe in such things are credulous, irrational and unscientific. We talk to the leading critics of the new research, who reflect the views of the scientific establishment that ESP really stands for Error Some Place - and we show some scientists' recent attempts to answer their critics by taking ESP out of the laboratory and putting it to the test in the world of commerce, crime, archaeology and warfare.[51]
}}{{Episode list		Title=The Artificial Heartdf=yes|1983|10|03}}ProdCode=2ShortSummary=Barney Clark died in March, having survived 112 days with the world's first permanent pneumatic total artificial heart. Horizon follows the case with the surgeon, William DeVries, and looks at the prospects for this technology to save lives.
}}{{Episode list		Title=Dr Priestley and the Breath of Lifedf=yes|1983|10|10}}ProdCode=3ShortSummary=On 1 August 1774 Dr Joseph Priestley discovered an unknown gas-oxygen: a discovery that may lead today to a cure for rheumatoid arthritis and cheap fuel from sunlight. Professor Ian Fells shows how we are still trying to understand the links between oxygen and living things.[52]
}}{{Episode list		Title=Professor Hawking's Universedf=yes|1983|10|17}}ProdCode=4ShortSummary=The Lucasian Professor of Mathematics at Cambridge University, he made his name by discovering that black holes are not necessarily black - some of them shine. Afflicted by a terrible illness, Professor Hawking relies on his young students to help him In his work - an ambitious programme to unify all the disparate theories of physics into one ultimate theory of everything. If he succeeds, then his discipline, theoretical physics, may have only 20 years or so to go before it comes to an end.[53]
}}{{Episode list		Title=The Cruel Choicedf=yes|1983|10|24}}ProdCode=5ShortSummary=Each year in Britain four million animals, including rats, mice, rabbits, dogs and monkeys are used for animal experiments; their bodies are the testing ground for new products as well as for the advance of scientific knowledge. Scientists maintain that without these animal experiments our future health and safety would be dangerously at risk. Yet to many of us the very idea of animals being used in this way is repugnant. Are all these animal experiments essential or useful? Could they be replaced by cell cultures, computer models and other sophisticated laboratory techniques which would relieve or remove that suffering and death? Does it have to be either our well-being or animal welfare? An investigation into the alternatives to that cruel choice.[54]
}}{{Episode list		Title=A Child's Guide to Languagesdf=yes|1983|10|31}}ProdCode=6
}}{{Episode list		Title=China's Childdf=yes|1983|11|07}}ProdCode=7
}}{{Episode list		Title=The Earthquake Connectiondf=yes|1983|11|14}}ProdCode=8
}}{{Episode list		Title=Prisoner or Patient?df=yes|1983|11|28}}ProdCode=9
}}{{Episode list		Title=Cancer, The Pattern in the Genesdf=yes|1983|12|05}}ProdCode=10
}}{{Episode list		Title=The Academydf=yes|1983|12|12}}ProdCode=11
}}{{Episode list		Title=The Intelligence Mandf=yes|1984|01|09}}ProdCode=12
}}{{Episode list		Title=Microworlddf=yes|1984|01|16}}ProdCode=13
}}{{Episode list		Title=A New Green Revolution?df=yes|1984|01|23}}ProdCode=14ShortSummary=In 1970 Dr Norman Borlaug was awarded the Nobel Peace Prize for advances in agricultural technology which had produced new 'miracle' rice and wheat. The Green Revolution had arrived; it was hoped that world hunger would disappear. But in the years which followed the new technology only seemed to make the rich farmers richer and the poor farmers poorer. How have agricultural scientists responded to this? Through the eyes of an economist, Keith Griffin (President of Magdalen College, Oxford) Horizon looks critically at the new 'Green Revolution' as scientists work in Mexico, Bangladesh and the Philippines to help the poor grow more food. Their new approach may offer some hope - but unless there are equal changes in economic and political structures are other kinds of revolution inevitable?[55]
}}{{Episode list		Title=Spies in the Wiresdf=yes|1984|01|30}}ProdCode=15
}}{{Episode list		Title=Valley of the Incadf=yes|1984|02|13}}ProdCode=16
}}{{Episode list		Title=Conquest of the Parasitesdf=yes|1984|02|27}}ProdCode=17
}}{{Episode list		Title=Reflections on a Riverdf=yes|1984|03|05}}ProdCode=18
}}{{Episode list		Title=A Normal Facedf=yes|1984|03|12}}ProdCode=19
}}{{Episode list		Title=Prisoners of Incestdf=yes|1984|03|19}}ProdCode=20
}}{{Episode list		Title=Signs of the Apes, Songs of the Whalesdf=yes|1984|03|26}}ProdCode=21
}}{{Episode list		Title=Professor Bonner and the Slime Mouldsdf=yes|1984|04|09}}ProdCode=22
}}{{Episode list		Title=The Mind of a Murderer, 1: The Case of the Hillside Stranglerdf=yes|1984|04|16}}ProdCode=23
}}{{Episode list		Title=The Mind of a Murderer, 2: The Mask of Madnessdf=yes|1984|04|17}}ProdCode=24
}}{{Episode list		Title=A Cruel Inheritancedf=yes|1984|04|30}}ProdCode=25
}}{{Episode list		Title=The Malvern Linkdf=yes|1984|05|07}}ProdCode=26
}}{{Episode list		Title=Biology at War: The Mystery of Yellow Raindf=yes|1984|05|15}}ProdCode=—ShortSummary = Report from Laos, Thailand and Kampuchea on the alleged use of biological warfare in these countries by the USSR.
}}{{Episode list		Title=Beyond the Moondf=yes|1984|07|21}}ProdCode=—ShortSummary = Report, using material of the time, of the 1969 moon landing, and discussion on the USA's space programme.
}}

Series 21: 1984–1985

TitleOriginal broadcast dateEpisode{{Episode listTitle=Biology at War: A Plague in the Winddf=yes|1984|10|29}}ProdCode=—ShortSummary = Investigates the history of germ warfare and the threat of a new biological arms race.
}}{{Episode list		Title=Contented Cows and Other Animalsdf=yes|1984|11|05}}ProdCode=1ShortSummary = Chickens packed in battery cages, pigs in metal crates so small they can't turn round - that's what modern farming means to many people, and they're against it. But what do the animals feel about it all? Scientists are now studying farm animals to find out more about their natural behaviour and about how farmers can change the way they treat them, in the hope of improving farm productivity and making life better for them. And they've come up with some surprising evidence from experiments that include lambs in balaclava helmets, hens laying multicoloured eggs, pigs building nests - and a group of chickens that roundly rejected an influential government report on welfare.[56]
}}{{Episode list		Title=Picking Winnersdf=yes|1984|11|12}}ProdCode=2
}}{{Episode list		Title=The Brain Puzzledf=yes|1984|11|19}}ProdCode=3
}}{{Episode list		Title=Global Villagedf=yes|1984|11|26}}ProdCode=4
}}{{Episode list		Title=Ivandf=yes|1984|12|03}}ProdCode=5
}}{{Episode list		Title=A Mathematical Mystery Tourdf=yes|1984|12|10}}ProdCode=6
}}{{Episode list		Title=Supercharged, The Grand Prix Car (1924–1939)df=yes|1984|12|17}}ProdCode=7
}}{{Episode list		Title=Colourful Notionsdf=yes|1985|01|07}}ProdCode=8
}}{{Episode list		Title=A World of Their Owndf=yes|1985|01|14}}ProdCode=9
}}{{Episode list		Title=Decoding Daneburydf=yes|1985|01|21}}ProdCode=10
}}{{Episode list		Title=A Mission to Healdf=yes|1985|01|28}}ProdCode=11
}}{{Episode list		Title=Mystery of the Left Handdf=yes|1985|02|04}}ProdCode=12
}}{{Episode list		Title=The Theatre of Wardf=yes|1985|02|11}}ProdCode=13
}}{{Episode list		Title=The Careful Predatordf=yes|1985|02|25}}ProdCode=14
}}{{Episode list		Title=What Einstein Never Knewdf=yes|1985|03|04}}ProdCode=15
}}{{Episode list		Title=Eurekaaargh!df=yes|1985|03|11}}ProdCode=16
}}{{Episode list		Title=Careering Ondf=yes|1985|03|18}}ProdCode=17
}}{{Episode list		Title=How to Film the Impossibledf=yes|1985|03|25}}ProdCode=18
}}{{Episode list		Title=The Food Allergy Wardf=yes|1985|04|01}}ProdCode=19
}}{{Episode list		Title=The Goddess of the Earthdf=yes|1985|04|15}}ProdCode=20
}}{{Episode list		Title=Iras, The Supercooled Eyedf=yes|1985|04|22}}ProdCode=21
}}{{Episode list		Title=A Prize Discoverydf=yes|1985|04|29}}ProdCode=22
}}{{Episode list		Title=Twenty-First Birthdaydf=yes|1985|05|20}}ProdCode=23
}}

Series 22: 1985–1986

TitleOriginal broadcast dateEpisode{{Episode listTitle=Halley's Comet: The Apparitiondf=yes|1985|11|25}}ProdCode=—ShortSummary = Report on the passage of the European Giotto spacecraft as it passes through the tail of Halley's Comet.
}}{{Episode list		Title=Are You a Racist?df=yes|1986|01|06}}ProdCode=1
}}{{Episode list		Title=Genesisdf=yes|1986|01|13}}ProdCode=2
}}{{Episode list		Title=Bitter Colddf=yes|1986|01|20}}ProdCode=3
}}{{Episode list		Title=The Mould, the Myth and the Microbedf=yes|1986|01|27}}ProdCode=4
}}{{Episode list		Title=Outbreak, The Microbe Masters the Moulddf=yes|1986|02|03}}ProdCode=5
}}{{Episode list		Title=The Wrong Stuffdf=yes|1986|02|10}}ProdCode=6
}}{{Episode list		Title=Science... Fiction?df=yes|1986|02|17}}ProdCode=7
}}{{Episode list		Title=The Children of Evedf=yes|1986|02|24}}ProdCode=8
}}{{Episode list		Title=The New Face of Leprosydf=yes|1986|03|03}}ProdCode=9
}}{{Episode list		Title=Hi-Tech a la Françaisedf=yes|1986|03|10}}ProdCode=10
}}{{Episode list		Title=In the Wake of HMS Sheffielddf=yes|1986|03|17}}ProdCode=11
}}{{Episode list		Title=AIDS, A Strange and Deadly Virusdf=yes|1986|03|24}}ProdCode=12ShortSummary=The virus that causes AIDS has become one of the most intensively studied disease-causing organisms in the history of science. Its anatomy has been dissected, and the way it penetrates the body's defences understood. This year a vaccine has reached the crucial stage of testing in monkeys. And a powerful new drug may offer some hope to sufferers. But the more AIDS researchers learn, the more worried they become. The virus has now infected 20 million people across the globe; it is spreading sexually between males and females; and attacking not only the immune system, but also the brain. Eventually, hundreds of thousands of young people with AIDS may require specialised mental health care.[57]
}}{{Episode list		Title=The Case of the Frozen Addictdf=yes|1986|04|07}}ProdCode=13ShortSummary=Originally a Nova episode, first aired on PBS in February.
}}{{Episode list		Title=Nice Guys Finish Firstdf=yes|1986|04|14}}ProdCode=14
}}{{Episode list		Title=The Men Who Bottled a Cowdf=yes|1986|04|21}}ProdCode=15
}}{{Episode list		Title=Twice Five plus the Wings of a Birddf=yes|1986|04|28}}ProdCode=16
}}{{Episode list		Title=What Makes an Animal Smart?df=yes|1986|05|12}}ProdCode=17
}}{{Episode list		Title=A Handful of Sugar with a Pinch of Saltdf=yes|1986|05|19}}ProdCode=18
}}{{Episode list		Title=Uranus Encounterdf=yes|1986|05|26}}ProdCode=19
}}{{Episode list		Title=Who Built Stonehenge?df=yes|1986|06|09}}ProdCode=20
}}{{Episode list		Title=Battered Baby, 1: From Generation to Generationdf=yes|1986|06|16}}ProdCode=21
}}{{Episode list		Title=Battered Baby, 2: Breaking the Chaindf=yes|1986|06|23}}ProdCode=22
}}{{Episode list		Title=Doctors to Bedf=yes|1986|06|30}}ProdCode=23
}}

Series 23: 1986–1987

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Twenty-Five Hour Clockdf=yes|1987|01|05}}ProdCode=1 ShortSummary = There are clocks in your body which, left to themselves, would have you live a 25-hour day. Tampering with them, just by working the wrong shift pattern, may lead to illness, or may affect your ability to have a child. Understanding body-clocks helps to cure winter depression, warns of death rhythms in unborn babies, leads to pills for reducing jet-lag, gives longer lives to some cancer patients - and may even provide cheaper meat.
}}{{Episode list		Title=The Search for the Disappeareddf=yes|1987|01|12}}ProdCode=2 ShortSummary = How can science help in the investigation of political kidnappings and mass murder? Argentina's military juntas were responsible for torturing and killing over 10,000 people. Today their bones are their only witnesses. By exhuming unmarked graves, forensic scientists are identifying individual victims and finding important evidence to bring those responsible to justice. Many of the 'Children of the Disappeared' have survived because they were illegally taken by military families who may have been involved in their parents' murder. When grandparents eventually trace their grandchildren, the only way they can get them back is to prove their real identity by genetic testing.
}}{{Episode list		Title=The Blind Watchmakerdf=yes|1987|01|19}}ProdCode=3
}}{{Episode list		Title=Riding the Stackdf=yes|1987|01|26}}ProdCode=4
}}{{Episode list		Title=Bruno Bettelheim, 1: The Man Who Cared for Childrendf=yes|1987|02|02}}ProdCode=5
}}{{Episode list		Title=Bruno Bettelheim, 2: A Sense of Survivingdf=yes|1987|02|09}}ProdCode=6
}}{{Episode list		Title=Energy from Outer Spacedf=yes|1987|02|16}}ProdCode=7
}}{{Episode list		Title=The Return of the Ospreydf=yes|1987|02|23}}ProdCode=8
}}{{Episode list		Title=Can AIDS Be Stopped?df=yes|1987|03|02}}ProdCode=9
}}{{Episode list		Title=Police Stress, John Wayne Syndromedf=yes|1987|03|09}}ProdCode=10
}}{{Episode list		Title=To Engineer Is Humandf=yes|1987|03|16}}ProdCode=11
}}{{Episode list		Title=The Magma Chamberdf=yes|1987|03|23}}ProdCode=12
}}{{Episode list		Title=Broken Imagesdf=yes|1987|03|30}}ProdCode=13
}}{{Episode list		Title=Trial Babiesdf=yes|1987|04|06}}ProdCode=14
}}{{Episode list		Title=After Chernobyl, Closer to Homedf=yes|1987|04|13}}ProdCode=15
}}{{Episode list		Title=Life Storydf=yes|1987|04|27}}ProdCode=—
}}{{Episode list		Title=Making Sex Paydf=yes|1987|05|11}}ProdCode=16
}}{{Episode list		Title=The Anthropic Principledf=yes|1987|05|18}}ProdCode=17
}}{{Episode list		Title=Aircrash, The Burning Issuedf=yes|1987|06|01}}ProdCode=18
}}{{Episode list		Title=Riddle of the Jointsdf=yes|1987|06|08}}ProdCode=19 ShortSummary = In Wells Cathedral there is a clue to the origin of rheumatoid arthritis. It is one tiny piece in the puzzle that has vexed doctors for 200 years: what causes this crippling joint disease? Is it an infection by bacteria or viruses? Is it stress or diet? Intense research this century has answered some of these questions, only to reveal more ... Is it inherited? Will it suddenly disappear as rapidly as it appeared? The ultimate cause, and a cure, remain to be found, but recent discoveries offer some hope for the million Britons who suffer from rheumatoid arthritis.
}}{{Episode list		Title=To Catch a Falling Stardf=yes|1987|06|15}}ProdCode=20
}}{{Episode list		Title=In the Light of New Informationdf=yes|1987|06|22}}ProdCode=21 ShortSummary = The information-hungry world of the 21st century will be fed not by electrical signals, but by pulses of invisible laser light flying along fibres of glass. What is the revolution in communications that has ousted electricity in favour of light? With crashing motorbikes, stretching trains and a semiconductor laser the size of a department store, Horizon investigates the mysterious world of light technology and, at the frontiers, finds plans for computers that will process information with light.
}}{{Episode list		Title=Janice's Choicedf=yes|1987|06|29}}ProdCode=22 ShortSummary = Janice Blenkharn faces the hardest choice of her life. Whether or not she wants to be told if she will develop an incurable genetic disease called Huntington's disease. Every child of an affected parent has a 50-50 chance of inheriting it. Janice's mother died of Huntington's Chorea, so Janice is at risk. If she develops it, then her children will be at risk. Until now, there has been no way of knowing who will be affected and who spared. But thanks to painstaking research in a remote South American fishing village, a test now exists. It offers Janice, and others at risk from this fatal disease, the chance to see into the future.
}}

Series 24: 1987–1988

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Transplanted Braindf=yes|1988|01|04}}ProdCode=1 ShortSummary = For sufferers of Parkinson's Disease, hope lies in a new experimental operation - a brain transplant - and the first on a human being is just about to take place. This remarkable technique may one day also treat patients with Alzheimer's Disease, strokes and paralysing spinal cord injuries, yet promises to be surrounded by controversy because of the source of the transplanted tissue.
}}{{Episode list		Title=Death of a Stardf=yes|1988|01|11}}ProdCode=2 ShortSummary = Deep in a Japanese cave, a star's last moments are detected by signals from particles which have travelled through 170,000 light years of space, and then through the earth itself. It was the most important event in any living astronomer's lifetime, because dying stars are central to the life of our universe. So when the supernova appeared in the southern sky last February, the world's astronomers turned every available instrument on to it. This unique international collaboration has given fascinating insights into one of the universe's most violent events. The programme follows the supernova's story, from its first sighting in Chile to Australia, America and Japan. Originally a Nova episode aired on PBS in October 1987.
}}{{Episode list		Title=Playing with Madnessdf=yes|1988|01|18}}ProdCode=3 ShortSummary = Manic depression is a crippling emotional illness. It carries a high risk of suicide. It is now known that it has a strong genetic component. Those genes affect over one per cent of humanity: some 50 million people. Is manic depression simply another genetic cross that mankind has to bear, or do these genes also convey some sort of advantage that helps to explain their survival? Many manic depressives are creative - is it in spite of their illness - or because of it? And what has madness to do with poetry, art, music, literature and leadership? Could it be that mental illness is, in some sense, necessary?
}}{{Episode list		Title=The Canal in the Jungledf=yes|1988|01|25}}ProdCode=4 ShortSummary = The Panama Canal, now a billion-dollar commercial crossroads, was in 1881 a snake-infested forest and swamp, harbouring yellow fever and malaria, with sawgrass that shredded skin like a razor. When the jungle beat Old World canal diggers from France, engineers from the brash young United States took over, fired by the success of their new transcontinental railroad. Of the half million workers, who toiled for decades to create this new wonder of the world, 28,000 died. Today the canal carries 12,000 ships a year. But its future is threatened, because of damage to the rain forest on which Panama depends.
}}{{Episode list		Title=Death of the Working Classesdf=yes|1988|02|01}}ProdCode=5 ShortSummary = If you are born into a working class family, from your first breath you are at greater risk of dying than the baby of professional parents. At all ages, death has a class bias. The NHS has made no difference to the health gap between the social classes. Is the gap because of the way people behave - eating chips, smoking - or is it the result of poverty and deprivation? Does stress matter, and if so, what kind? Can unemployment kill? Horizon investigates the theories behind the shocking statistics and asks if the will is there to do anything about them.
}}{{Episode list		Title=The Greenhouse Effectdf=yes|1988|02|08}}ProdCode=6 ShortSummary = The temperature is going up. Britain may become warmer, but even wetter. The grain belt of America may get too dry to produce grain. In India, the monsoons may fail. Humans around the globe would face greater challenges than ever. By burning coal, oil and gas, carbon dioxide is added to the atmosphere. It keeps more of the sun's heat in, which is making the world warm up. And, in a chain reaction, sea level, crop growth and rainfall will all change. Can the Greenhouse Effect be avoided, caused as it is by one of the most basic human activities - the generation of power? As one scientist says: '... we're hooked, we can't stop'.
}}{{Episode list		Title=Struggling for Controldf=yes|1988|02|15}}ProdCode=7 ShortSummary = This summer thousands of holiday-makers are spending their first day in the Costa del Gatwick, as foreign air traffic controllers struggle to find space for them. Here, a new flight is crammed into the airspace every ten seconds. Horizon gained unprecedented access to investigate how air traffic control really works. One dimly lit operations room handles everything that flies over England and Wales. Yet controllers say equipment is out of date and keeps breaking down. Plans for the new London City Airport went wrong a few weeks after opening day. Why? How much longer can controllers struggle with the tidal wave of aircraft?
}}{{Episode list		Title=Thinkingdf=yes|1988|02|22}}ProdCode=8 ShortSummary = Good news: computers won't take over after all. Thinking can't be produced just by running a computer programme. So argues John Searle, a philosopher at the University of California. His controversial views annoy those scientists who work to create 'artificial intelligence'. They believe thinking can be done by computer. Using a play in Cantonese, a machine that looks like an old mangle and the ideas and images of recent news, Horizon explores the limitations of digital computers.
}}{{Episode list		Title=Patients on Trialdf=yes|1988|02|29}}ProdCode=9 ShortSummary = For the past ten years doctors in America have been experimenting with a new drug to treat incurable cancers. Interleukin 2 has been both acclaimed as a miracle and criticised as cruel and unethical. Some patients with advanced tumours are completely cured, but most show no improvement and suffer agonising physical and psychological side effects. A few die from the treatment. Horizon follows three patients who have been accepted on to the drug trial. Stakes are high for both sides. The researchers believe that this costly and controversial therapy could revolutionise cancer treatment. The patients are guinea pigs in a last-ditch experiment to save their lives.
}}{{Episode list		Title=Purple Warrior, Rules of Engagementdf=yes|1988|03|07}}ProdCode=10 ShortSummary = The first of two programmes As HMS Ark Royal is harassed by an enemy submarine, Admiral White's response, as Joint Force Commander, is governed by the 'Rules of Engagement' filtering down from Whitehall. Exercise Purple Warrior involves 20,000 men and 39 ships. Their task is to evacuate UK nationals peacefully from 'Kaig' and, if possible, to avoid war. With cameras at the actual Command Centre used for the Falklands war, on HMS Ark Royal, on HMS Intrepid and on windswept 'Kaig', Horizon observes how London attempts to maintain control of a worsening situation.
}}{{Episode list		Title=Purple Warrior, Limited Wardf=yes|1988|03|14}}ProdCode=11 ShortSummary = Two days after Exercise Purple Warrior lands on 'Kaig', Orange attacks the Task Force with bombs and Exocets. Meanwhile, in London at the Command Centre used for the Falklands War, staff are still catching up on the overnight signals and getting ready to brief Admiral Dingemans. At sea, off 'Kaig', Admiral White is preparing to transfer command of the Joint Force of 17,000 men and 39 ships to General Vaux. First Vaux must establish his headquarters ashore, but the weather is beginning to close in, making all amphibious movements unpredictable....
}}{{Episode list		Title=The Heart of Anotherdf=yes|1988|03|28}}ProdCode=12 ShortSummary = Winner of the Royal Society Award for best science, medical or technology programme of 1987. Pierre Garand and Gilles Thibault lie critically ill in Montreal's Royal Victoria Hospital. Their only hope of survival is a heart transplant. Horizon follows every stage of the fight to save each life: the doctors' discussions to decide whether the patient is too ill to have a transplant; the anxiety of the family as they wait; the frantic search for a donor and the surgeons' race across the border to the USA to get a heart. Finally, hours later, will the transplanted heart beat in its new body?
}}{{Episode list		Title=Easter Island, The Secretsdf=yes|1988|04|11}}ProdCode=13 ShortSummary = Since its discovery on Easter morning in 1722, Easter Island has remained a fascinating puzzle. It is the most isolated inhabited land on earth, and yet it was also home to a glorious stone culture. Can the mystery of its giant statues ever be solved? Who built them, how and why - and what happened to the civilisation that once flourished there? From all over the world scientists are drawn to this lonely spot, in search of answers. In the first of a two-part investigation, Horizon pieces together the clues that can reveal the secrets of a vanished past.
}}{{Episode list		Title=Easter Island, The Storydf=yes|1988|04|18}}ProdCode=14 ShortSummary = The most isolated inhabited island in the world is haunted by huge brooding statues and a mysterious past. Science has unravelled some of its secrets, but now, in the second of a two-part investigation, Horizon looks for alternative information to solve the remaining pieces of the puzzle. The islanders believe that the statues literally walked, by magic, from their quarry to the ceremonial platforms. They believe that an old woman's spell on greedy stone-carvers brought the quarrying to a halt, but hazy myth and scraps of legend can be used to re-interpret scientific finds, and finally tell the story of the extraordinary statue-builders.
}}{{Episode list		Title=Doctors to Be, 1: Trial by Interviewdf=yes|1988|04|23}}ProdCode=—ShortSummary = Part of the Doctors to Be series following the careers of medical students. Two sixth formers face the interview panel for places at St Mary's Hospital Medical School.
}}{{Episode list		Title=Doctors to Be, 2: The Knowledgedf=yes|1988|04|24}}ProdCode=—ShortSummary = Part of the Doctors to Be series. October 1985. The medical students face their first exams.
}}{{Episode list		Title=Doctors to Be, 3: Welcome to the Real Worlddf=yes|1988|04|25}}ProdCode=—ShortSummary = Part of the Doctors to Be series. After two years of medical training, the medical students are put into the 'real world' of a surgical ward at St Mary's Hospital, Paddington.
}}{{Episode list		Title=Cancer at Baydf=yes|1988|05|04}}ProdCode=15 ShortSummary = When Chinese and Japanese people move to California they change their lifestyles. So did the Greeks and Italians who migrated to Australia. The result is a change in the cancers they develop. This programme explores how changes in the way we live can reduce the risk of cancer.
}}{{Episode list		Title=Traces of Murderdf=yes|1988|05|09}}ProdCode=16 ShortSummary = When there is a series of linked murders, particularly of children, the killer is likely to strike again. These are the most serious of crimes. After failures in the case of the Yorkshire Ripper, the Home Secretary promised the harnessing for such investigations of the best detective and forensic skills in the country, and the use of computer technology. Has this happened? New technology is now available on both sides of the Atlantic and may increase the chances of solving these disturbing crimes.
}}{{Episode list		Title=The Hope of Progressdf=yes|1988|05|16}}ProdCode=17 ShortSummary = Sir Peter Medawar, who died last November, was a great scientist who, with the help of an exceptional woman, triumphed over adversity and justified his hope of progress. He was shocked by the appalling burns of a Second World War airman who crashed near his home, and he set to work to find a treatment using skin grafts. His fundamental discoveries about the immune system inspired the surgeons who pioneered transplantation. Sir Peter became a Nobel Laureate and figurehead of British science. After a severe stroke, his own courage and the support of his remarkable wife Jean, enabled him to return to writing, including his autobiography Memoir of a Thinking Radish. Alan Howard reads Sir Peter's own words in this tribute from his colleagues and Lady Medawar.
}}{{Episode list		Title=A Newsday Revolutiondf=yes|1988|05|23}}ProdCode=18 ShortSummary = There has been an electronic revolution in television news. It has affected the way news is gathered, presented and edited. Horizon follows BBC TV news teams at home and abroad for just one day, to see how the new technology works: in the studio with Sue Lawley; at the White House with Tim Sebastian in the newsroom with the editors. How is the new technology changing the news you see on your screen? When Tuesday 22 March started, it looked like being an ordinary newsday. It didn't turn out that way.
}}{{Episode list		Title=A Good Test?df=yes|1988|06|06}}ProdCode=19 ShortSummary = Paul Mercer, a student, wants to be a naval officer. John Josling, a manager, hopes to become a director of his company. Naval psychologists use psychometric tests (the modern IQ tests) which involve two days of rigorous assessment to help select their potential high-fliers. But the officer chairing the Admiralty Interview Board believes that it's not until you can look into the man's eyes that you get a feel for his true character. Are the tests valid - and is the result fair to Paul Mercer? John Josling agrees to submit himself to vigorous and potentially embarrassing personality testing. His company believes it will identify his strengths and weaknesses and assist his ambitions for promotion. But can you really change personality with paper tests?
}}{{Episode list		Title=Superconductor, The Race for the Prizedf=yes|1988|06|13}}ProdCode=20 ShortSummary = The flow of electricity with absolutely no loss due to resistance could mean far cheaper power, levitated trains and ever-faster computers. But until 1986, the technology was so complicated and expensive that almost its only use was for the powerful magnets of medical scanners. This is the story of a scientific breakthrough and the hectic race that followed - for superconductors that work at higher temperatures, for applications and lucrative manufacturing patents, for an explanation of how the new materials work... and with luck, a share in a Nobel prize.
}}{{Episode list		Title=Believe Medf=yes|1988|06|27}}ProdCode=21 ShortSummary =To be told 'your illness is all in the mind' or 'pull yourself together' is no help to people like Mollie Champion - 14 years seeking a diagnosis and still not cured, or Michael Mayne. 'Post-viral syndrome' 'Yuppie flu', 'Royal Free disease', or 'myalgic encephalomyelitis', has divided medical opinion for over 30 years. Now, thousands of patients are struggling for recognition of this distressing condition, while fighting the fundamental attitudes of doctors to diagnosis and disease. But as some patients suffer, others try a fresh approach: independently of their doctors .
}}{{Episode list		Title=The Quest for Tannu Tuvadf=yes|1988|07|04}}ProdCode=—ShortSummary = Shortly before his death in February 1988, the scientist Richard Feynman talked about his ten year fascination with Tannu Tuva, a Shangri-La on the edge of Mongolia, which very few westerners have ever seen. Also released by PBS' NOVA months later.
}}

Series 25: 1988–1989

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Diary of Discoverydf=yes|1988|09|28}}ProdCode=1ShortSummary=Horizon follows the preparation of the five astronauts of the space shuttle Discovery, the first shuttle flight since the Challenger disaster of 1986.
}}{{Episode list		Title=The Book of Mandf=yes|1989|01|09}}ProdCode=2ShortSummary=Horizon looks at the Human Genome Project, an attempt to map all the genes of human DNA.
}}{{Episode list		Title=The Poison That Waitsdf=yes|1989|01|16}}ProdCode=3ShortSummary=Horizon reports on the abnormally high occurrence of senile dementia and Parkinson's disease on the Pacific island of Guam that scientists believe is linked to a poison in the native cycad fruit.
}}{{Episode list		Title=Perils of the Deepdf=yes|1989|01|23}}ProdCode=4ShortSummary=Horizon looks at evidence that seems to show that diving can cause long term damage to the brain and spinal cord, even in shallow waters.
}}{{Episode list		Title=Smart Weaponsdf=yes|1989|01|30}}ProdCode=5ShortSummary=Weapons are being developed that are controlled by computers to destroy specific targets.
}}{{Episode list		Title=Wasting the Alpsdf=yes|1989|02|06}}ProdCode=6ShortSummary=Horizon investigates the damage that pollution and tourism are inflicting on the Swiss Alps.
}}{{Episode list		Title=In the Last Resortdf=yes|1989|02|13}}ProdCode=7ShortSummary=Where can the elderly live who are unable to live at home, in a care home, or in sheltered accommodation?
}}{{Episode list		Title=Gaze in Wonderdf=yes|1989|02|20}}ProdCode=8ShortSummary=An interview with Professor Eric Laithwaite who believes that many modern inventions already exist in nature.
}}{{Episode list		Title=In My Lifetime?df=yes|1989|02|27}}ProdCode=9ShortSummary=Two-and-a-half years ago, broadcaster Glyn Worsnip was told he had an incurable brain disease. Like many thousands with obscure diseases he wanted to know: what research is going on? Who is paying for it? Are patients getting the benefit? To get answers, he questions the Medical Research Council, a Nobel Prize winner, his own GP, a large drug company, small charity support groups and eminent doctors round the country.
}}{{Episode list		Title=Concertodf=yes|1989|03|06}}ProdCode=10ShortSummary=In Paris, Xavier Rodet has taught a computer to sing Mozart; in Greenwich Village, Wendy Carlos synthesises a classical concerto from electronic tones. Professor Nagyvary has made a new violin with waterlogged wood and powdered gems. He claims it sounds like a Stradivarius. In Australia, Manfred Clynes reckons he has discovered a universal human language of emotion. To prove it he creates feelings on tape. What's left for human performers to contribute?
}}{{Episode list		Title=Black Schizophreniadf=yes|1989|03|13}}ProdCode=11ShortSummary=British Afro-Caribbeans are ten times more likely to develop schizophrenia than the rest of the population, according to a psychiatric study in Nottingham. Black critics claim that white psychiatrists are misdiagnosing black people and that the report is a classic example of racism in medicine. They also warn that the report may do untold harm to our race relations. The Nottingham researchers believe that their findings could provide a clue to the causes of this mysterious and terrible form of madness. Are their conclusions valid and should the research have been done?
}}{{Episode list		Title=Trial in the Jungledf=yes|1989|03|20}}ProdCode=12ShortSummary=The Tasaday, a remote Philippine tribe living 'in the Stone Age', are now seen as a famous scientific hoax. But when they were first discovered, in 1971, they were hailed as the anthropological find of the century. How did these people dupe every scientist who went to see them? Horizon has investigated the extraordinary story and arrived at a quite different conclusion. Weigh up the evidence from their stone tools, their language, their knowledge of plants and.... perhaps there wasn't a hoax at all.
}}{{Episode list		Title=Who Will Make Me Better?df=yes|1989|04|03}}ProdCode=13ShortSummary=Millions of visits are made each year to acupuncturists, homeopaths, food allergists, or people who diagnose disease by looking in your eyes or waving a pendulum. Scientific evidence is still lacking that such therapies cure disease, but they often seem to make people 'better'. It turns out that whether you chose an NHS consultant or a fringe alternative practitioner, it may not make much difference to your chances of 'getting better'.
}}{{Episode list		Title=A Wonderful Lifedf=yes|1989|04|17}}ProdCode=14ShortSummary=Genius, aeronautical engineer, soldier, schoolmaster, gardener, hospital porter, architect, recluse, and Cambridge Professor of Philosophy, Ludwig Wittgenstein was one of the most original thinkers of this century. Born 100 years ago into one of the richest families in the Austro-Hungarian empire, he gave away all his money, and lived on the edge of madness and suicide until his death in 1951. And yet his last words were: 'Tell them I've had a wonderful life!' .
}}{{Episode list		Title=Why Buildings Make You Sickdf=yes|1989|04|24}}ProdCode=15ShortSummary=Feeling ill at work? It could be your building that's to blame. When Sick Building Syndrome strikes, it brings a flurry of mild symptoms such as headache, tiredness, sore eyes and runny nose. Horizon follows the investigation of one sick building where 94 per cent of the occupants report symptoms. Investigators know it's not a serious infection like Legionnaire's disease, but until now have been stumped to find a cause. Could it be dust or moulds in the ventilation ducts, too few negative ions in the air, even a build-up of chemicals? By piecing together different strands of new research, they can now discover the culprit.
}}{{Episode list		Title=Jubileedf=yes|1989|05|08}}ProdCode=16ShortSummary=An examination of whether Horizon has had an effect on the scientific community.
}}{{Episode list		Title=Crashdf=yes|1989|05|15}}ProdCode=17ShortSummary=Horizon investigates how many deaths on the road could be prevented with further technical and legislative changes.
}}{{Episode list		Title=The New Sixth Sensedf=yes|1989|05|22}}ProdCode=18ShortSummary=An investigation into recent biosensor technologies.
}}{{Episode list		Title=Clive Sinclair, The Anatomy of an Inventordf=yes|1989|06|12}}ProdCode=19ShortSummary=A profile of the inventor Clive Sinclair.
}}{{Episode list		Title=Newpin, A Lifelinedf=yes|1989|06|19}}ProdCode=20ShortSummary=Horizon examines whether child abuse and depression can be prevented by working with the mothers of young children.
}}{{Episode list		Title=Time of Darknessdf=yes|1989|06|26}}ProdCode=21ShortSummary=An investigation on the effects of volcanic eruptions on the global climate.
}}

Series 26: 1989–1990

TitleOriginal broadcast dateEpisode{{Episode listTitle=Oil Spilldf=yes|1990|01|08}}ProdCode=1
}}{{Episode list		Title=Medicine 2000df=yes|1990|01|15}}ProdCode=2
}}{{Episode list		Title=Food Irradiation: Would You Buy It?df=yes|1990|01|22}}ProdCode=3
}}{{Episode list		Title=From Earth to Mirandadf=yes|1990|01|29}}ProdCode=4
}}{{Episode list		Title=Encounter with Neptunedf=yes|1990|02|05}}ProdCode=5
}}{{Episode list		Title=Guess What's Coming to Dinnerdf=yes|1990|02|12}}ProdCode=6
}}{{Episode list		Title=The First 14 Daysdf=yes|1990|02|19}}ProdCode=7
}}{{Episode list		Title=The 10,000 Year Testdf=yes|1990|03|05}}ProdCode=8
}}{{Episode list		Title=Hurricane!df=yes|1990|03|12}}ProdCode=9
}}{{Episode list		Title=The Britannic Greenhousedf=yes|1990|03|19}}ProdCode=10
}}{{Episode list		Title=Cold Fusion: Too Close to the Sundf=yes|1990|03|26}}ProdCode=11
}}{{Episode list		Title=The Quake of 89: The Final Warning?df=yes|1990|04|02}}ProdCode=12ShortSummary = On the evening of 17 October 1989 there was an earthquake 60 miles south of San Francisco. Sixty-seven people died, 2,400 were injured and 10,000 left homeless. A massive earthquake, many times as damaging and this time centred directly on San Francisco, is expected within a few years. A city fire chief predicts they are so unprepared that they could lose 20,000 buildings and 8,000 lives. Will the city learn from the lessons of the quake of 89?[58]
}}{{Episode list		Title=The Sharpest Show of the Universedf=yes|1990|04|09}}ProdCode=13ShortSummary = Nasa is about to launch the Hubble space telescope, which promises the greatest advances in astronomy since Galileo. It will show ten times more details than is possible from the ground and see objects 30 times fainter or five times farther away than ever before. It will search for planets outside our solar system, and will tell us much more about the Universe. With long delays and huge cost-overruns, it is now approaching its point of greatest risk. If anything goes wrong on the launch, there is no back-up.[59]
}}{{Episode list		Title=The Company of Ants and Beesdf=yes|1990|04|23}}ProdCode=14
}}{{Episode list		Title=The Intelligent Islanddf=yes|1990|04|30}}ProdCode=15
}}{{Episode list		Title=Legacy of a Volcanodf=yes|1990|05|14}}ProdCode=16
}}{{Episode list		Title=Do Cows Make You Mad?df=yes|1990|05|21}}ProdCode=17
}}{{Episode list		Title=The Child Mothersdf=yes|1990|06|04}}ProdCode=18
}}{{Episode list		Title=Making an Honest Fiverdf=yes|1990|06|06}}ProdCode=—ShortSummary = Looks at the manufacturing processes involved in the production of a new five pound note due to be launched in June 1990. Considers the design and production of currency, and the intricate techniques developed to prevent forgeries.
}}{{Episode list		Title=Signs of Lifedf=yes|1990|06|11}}ProdCode=19
}}{{Episode list		Title=AIDS: A Quest for a Curedf=yes|1990|06|25}}ProdCode=20
}}

Series 27: 1990–1991

TitleOriginal broadcast dateEpisode{{Episode listTitle=Red Star in Orbit, 1: The Invisible Spacemandf=yes|1990|12|07}}ProdCode=—ShortSummary = First in a three-part Horizon Special series on the Soviet manned space programme, looking at the story of the projects, cosmonauts and engineers involved.
}}{{Episode list		Title=Red Star in Orbit, 2: The Dark Side of the Moondf=yes|1990|12|14}}ProdCode=—ShortSummary = Second in a three-part Horizon Special series on the Soviet manned space programme, looking at the story of the projects, cosmonauts and engineers involved.
}}{{Episode list		Title=Red Star in Orbit, 3: The Missiondf=yes|1990|12|21}}ProdCode=—ShortSummary = Third in a three-part Horizon Special series on the Soviet manned space programme, this one concentrating on the story of the two Soviet cosmonauts who risked their lives earlier this year in a space walk to try and repair their stricken craft, as well as anecdotes from veteran cosmonauts.
}}{{Episode list		Title=Sudden Deathdf=yes|1991|01|07}}ProdCode=1
}}{{Episode list		Title=Keen as Mustarddf=yes|1991|01|14}}ProdCode=2
}}{{Episode list		Title=Smokers Can Harm Your Healthdf=yes|1991|01|21}}ProdCode=3
}}{{Episode list		Title=Coming in from the Colddf=yes|1991|01|28}}ProdCode=4
}}{{Episode list		Title=Small Problem with the Mirrordf=yes|1991|02|04}}ProdCode=5
}}{{Episode list		Title=California Dreamingdf=yes|1991|02|11}}ProdCode=6
}}{{Episode list		Title=The Day the Earth Melteddf=yes|1991|02|18}}ProdCode=7
}}{{Episode list		Title=The Curse of Karashdf=yes|1991|02|25}}ProdCode=8
}}{{Episode list		Title=Playing at Noahdf=yes|1991|03|04}}ProdCode=9
}}{{Episode list		Title=Cashing in on Paradisedf=yes|1991|03|11}}ProdCode=10
}}{{Episode list		Title=The Terracotta Time Machinedf=yes|1991|03|18}}ProdCode=11
}}{{Episode list		Title=Measuring the Roof of the Worlddf=yes|1991|03|25}}ProdCode=12
}}{{Episode list		Title=The First Americansdf=yes|1991|04|15}}ProdCode=13
}}{{Episode list		Title=Inside Chernobyl Sarcophagusdf=yes|1991|04|22}}ProdCode=14ShortSummary = Chernobyl Unit Four exploded six years ago this week. The intensely radioactive ruins of the reactor now lie buried in the 'sarcophagus'. Much of it will be radioactive for more than 100,000 years. Horizon were the first westerners to film inside the sarcophagus where an elite team of Soviet scientists are working in areas of radiation that would be considered lethal by the west. They are driven by the urgent need to hunt down the 135 tonnes of uranium and plutonium which melted in the explosion, and to discover whether a second accident could happen at Chernobyl. This film tells the story of the remarkable scientists dedicating their lives to working there.[60]
}}{{Episode list		Title=Colonising Cyberspacedf=yes|1991|04|29}}ProdCode=15
}}{{Episode list		Title=Emerging Virusesdf=yes|1991|05|13}}ProdCode=16
}}{{Episode list		Title=Camelford, A Bitter Aftertastedf=yes|1991|05|20}}ProdCode=17
}}{{Episode list		Title=Of Big Bangs, Stick Men, and Galactic Holesdf=yes|1991|06|03}}ProdCode=18
}}{{Episode list		Title=Food for Thoughtdf=yes|1991|06|10}}ProdCode=19ShortSummary=This story by Horizon looks at the expanding and controversial area of "smart drugs".
}}{{Episode list		Title=The Long Road to the Westdf=yes|1991|06|17}}ProdCode=20
}}{{Episode list		Title=Half Hearted About Semi-Skimmeddf=yes|1991|06|24}}ProdCode=21
}}{{Episode list		Title=T-Rex Exposeddf=yes|1991|07|01}}ProdCode=22
}}

Series 28: 1991–1992

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Shadow of Breast Cancerdf=yes|1992|01|06}}ProdCode=1
}}{{Episode list		Title=Pest Warsdf=yes|1992|01|13}}ProdCode=2
}}{{Episode list		Title=Molecules with Sunglassesdf=yes|1992|01|20}}ProdCode=3
}}{{Episode list		Title=In Search of the Noble Savagedf=yes|1992|01|27}}ProdCode=4
}}{{Episode list		Title=Malaria, Battle of the Merozoitesdf=yes|1992|02|03}}ProdCode=5
}}{{Episode list		Title=The Black Sundf=yes|1992|02|17}}ProdCode=6
}}{{Episode list		Title=Hitler's Bombdf=yes|1992|02|24}}ProdCode=7
}}{{Episode list		Title=An Expensive Theologydf=yes|1992|03|02}}ProdCode=8
}}{{Episode list		Title=The Strange Life and Death of Dr. Turingdf=yes|1992|03|09}}ProdCode=9
}}{{Episode list		Title=Hot Jam in the Doughnutdf=yes|1992|03|16}}ProdCode=10
}}{{Episode list		Title=Diet for a Lifetimedf=yes|1992|03|30}}ProdCode=11
}}{{Episode list		Title=Before Babeldf=yes|1992|04|06}}ProdCode=12
}}{{Episode list		Title=The Man Who Moved the Mountainsdf=yes|1992|04|13}}ProdCode=13
}}{{Episode list		Title=Icemandf=yes|1992|04|27}}ProdCode=14
}}{{Episode list		Title=Taking the Creditdf=yes|1992|05|11}}ProdCode=15
}}{{Episode list		Title=Fast Life in the Food Chaindf=yes|1992|05|18}}ProdCode=16
}}{{Episode list		Title=Dodging Doomsdaydf=yes|1992|06|01}}ProdCode=17
}}{{Episode list		Title=A Question of Sport...df=yes|1992|06|08}}ProdCode=18
}}{{Episode list		Title=Genes R Usdf=yes|1992|06|15}}ProdCode=19
}}

Series 29: 1992–1993

TitleOriginal broadcast dateEpisode{{Episode listTitle= A Close Encounter of the Second Kinddf=yes|1992|07|10}}ProdCode=—
}}{{Episode list		Title=Hide and Seek in Iraqdf=yes|1992|08|23}}ProdCode=—
}}{{Episode list		Title=The Truth About Sexdf=yes|1992|12|03}}ProdCode=1
}}{{Episode list		Title=Awakening the Frozen Addictsdf=yes|1993|01|04}}ProdCode=2
}}{{Episode list		Title=Cheating Timedf=yes|1993|01|11}}ProdCode=3
}}{{Episode list		Title=TB, The Forgotten Plaguedf=yes|1993|01|18}}ProdCode=4
}}{{Episode list		Title=No Ordinary Genius, Episode 1df=yes|1993|01|25}}ProdCode=5
}}{{Episode list		Title=No Ordinary Genius, Episode 2df=yes|1993|02|01}}ProdCode=6
}}{{Episode list		Title=Mars Alivedf=yes|1993|02|08}}ProdCode=7
}}{{Episode list		Title=Suggers, Fruggers and Data-Muggersdf=yes|1993|02|15}}ProdCode=8
}}{{Episode list		Title=The Pyramid Buildersdf=yes|1993|02|22}}ProdCode=9
}}{{Episode list		Title=Here Be Monstersdf=yes|1993|03|01}}ProdCode=10
}}{{Episode list		Title=Icemandf=yes|1993|03|08}}ProdCode=11
}}{{Episode list		Title=Whatever Happened to Star Wars?df=yes|1993|03|15}}ProdCode=12
}}{{Episode list		Title=Resurrecting the Dead Sea Scrollsdf=yes|1993|03|22}}ProdCode=13
}}{{Episode list		Title=Dante Goes to Helldf=yes|1993|03|29}}ProdCode=14
}}{{Episode list		Title=Ghosts in the Dinosaur Graveyarddf=yes|1993|04|05}}ProdCode=15
}}{{Episode list		Title=The New Alchemistsdf=yes|1993|04|19}}ProdCode=16
}}{{Episode list		Title=Allergic to the Twentieth Centurydf=yes|1993|05|10}}ProdCode=17
}}{{Episode list		Title=Wot U Lookin At?df=yes|1993|05|24}}ProdCode=18
}}{{Episode list		Title=The Electronic Frontierdf=yes|1993|06|07}}ProdCode=19
}}{{Episode list		Title=A Vital Poisondf=yes|1993|06|14}}ProdCode=20
}}{{Episode list		Title=Chimp Talkdf=yes|1993|06|21}}ProdCode=21
}}{{Episode list		Title=Life Is Impossibledf=yes|1993|06|28}}ProdCode=22
}}

Series 30: 1993–1994

TitleOriginal broadcast dateEpisode{{Episode listTitle=Assault on the Maledf=yes|1993|10|31}}ProdCode=—
}}{{Episode list		Title=Small Arms, Soft Targetsdf=yes|1994|01|10}}ProdCode=1
}}{{Episode list		Title=The Last Mammothdf=yes|1994|01|17}}ProdCode=2
}}{{Episode list		Title=Gerald Edelman, The Man Who Made Up His Minddf=yes|1994|01|24}}ProdCode=3
}}{{Episode list		Title=Genie, Secret of the Wild Childdf=yes|1994|01|31}}ProdCode=4
}}{{Episode list		Title=Death Wish, The Untold Storydf=yes|1994|02|07}}ProdCode=5
}}{{Episode list		Title=Air Crash, The Deadly Puzzledf=yes|1994|02|14}}ProdCode=6
}}{{Episode list		Title=Hunt for the Doomsday Asteroiddf=yes|1994|02|28}}ProdCode=7
}}{{Episode list		Title=Hubble Visiondf=yes|1994|03|07}}ProdCode=8
}}{{Episode list		Title=Some Liked It Hotdf=yes|1994|03|14}}ProdCode=9
}}{{Episode list		Title=Too Close to the Sundf=yes|1994|03|21}}ProdCode=10
}}{{Episode list		Title=Sir Walter's Journey, A Genetic Map of Britaindf=yes|1994|03|28}}ProdCode=11
}}{{Episode list		Title=After the Flooddf=yes|1994|04|18}}ProdCode=12
}}{{Episode list		Title=Against the Clockdf=yes|1994|04|25}}ProdCode=13
}}{{Episode list		Title=Auschwitz, The Blueprints of Genocidedf=yes|1994|05|09}}ProdCode=14
}}{{Episode list		Title=Ulcer Warsdf=yes|1994|05|16}}ProdCode=15
}}{{Episode list		Title=30th Anniversary, The Far Sidedf=yes|1994|05|23}}ProdCode=16
}}

Series 31: 1994–1995

TitleOriginal broadcast dateEpisode{{Episode listTitle=Deaf Whale, Dead Whaledf=yes|1994|11|07}}ProdCode=1
}}{{Episode list		Title=Whispers of Creationdf=yes|1994|11|14}}ProdCode=2
}}{{Episode list		Title=The Predatordf=yes|1994|11|21}}ProdCode=3
}}{{Episode list		Title=Close Encountersdf=yes|1994|11|28}}ProdCode=4
}}{{Episode list		Title=Orange Sherbert Kissesdf=yes|1994|12|12}}ProdCode=5
}}{{Episode list		Title=Designer Winesdf=yes|1994|12|19}}ProdCode=6
}}{{Episode list		Title=Tibet, The Ice Motherdf=yes|1995|01|09}}ProdCode=7
}}{{Episode list		Title=Russia's Deep Secretsdf=yes|1995|01|16}}ProdCode=8
}}{{Episode list		Title=Bones of Contentiondf=yes|1995|01|23}}ProdCode=9
}}{{Episode list		Title=Siamese Twinsdf=yes|1995|01|30}}ProdCode=10
}}{{Episode list		Title= Twice Borndf=yes|1995|02|14}}ProdCode=—
}}{{Episode list		Title=Too Big Too Soon?df=yes|1995|02|20}}ProdCode=11
}}{{Episode list		Title=Farewell Fantastic Venusdf=yes|1995|02|27}}ProdCode=12
}}{{Episode list		Title=Exodusdf=yes|1995|03|06}}ProdCode=13
}}{{Episode list		Title=The Betrayersdf=yes|1995|03|13}}ProdCode=14
}}{{Episode list		Title=Icon Earthdf=yes|1995|03|20}}ProdCode=15
}}{{Episode list		Title=The I-Bombdf=yes|1995|03|27}}ProdCode=16
}}{{Episode list		Title=Foetal Attractiondf=yes|1995|04|03}}ProdCode=17
}}{{Episode list		Title=Cracks in the Crustdf=yes|1995|04|10}}ProdCode=18
}}{{Episode list		Title=Hearing Voicesdf=yes|1995|04|24}}ProdCode=19
}}

Series 32: 1995–1996

TitleOriginal broadcast dateEpisode{{Episode listTitle=Liardf=yes|1995|10|30}}ProdCode=1
}}{{Episode list		Title=The Human Laboratorydf=yes|1995|11|06}}ProdCode=2
}}{{Episode list		Title=Nanotopiadf=yes|1995|11|13}}ProdCode=3
}}{{Episode list		Title=Hunt for the Doomsday Asteroiddf=yes|1995|11|20}}ProdCode=4
}}{{Episode list		Title=A Code in the Nosedf=yes|1995|11|27}}ProdCode=5
}}{{Episode list		Title=AIDS, Behind Closed Doorsdf=yes|1995|12|04}}ProdCode=6
}}{{Episode list		Title=The Runaway Mountaindf=yes|1995|12|11}}ProdCode=7
}}{{Episode list		Title=The Butchers of Boxgrovedf=yes|1996|01|08}}ProdCode=8ShortSummary = An investigation into the discovery of Boxgrove Man.
}}{{Episode list		Title=Fermat's Last Theoremdf=yes|1996|01|15}}ProdCode=9ShortSummary = The story of Andrew Wiles' proof of Fermat's Last Theorem
}}{{Episode list		Title=A Miracle for Cancer?df=yes|1996|01|22}}ProdCode=10
}}{{Episode list		Title=Nature's Numbersdf=yes|1996|01|29}}ProdCode=11
}}{{Episode list		Title=The Gene Racedf=yes|1996|02|05}}ProdCode=12
}}{{Episode list		Title=Masters of the Ionospheredf=yes|1996|02|12}}ProdCode=13
}}{{Episode list		Title=Assault on the Maledf=yes|1996|02|26}}ProdCode=14
}}{{Episode list		Title=Death by Designdf=yes|1996|03|04}}ProdCode=15
}}{{Episode list		Title=The Planet Huntersdf=yes|1996|03|11}}ProdCode=16
}}{{Episode list		Title=Einstein, The Miracle Yeardf=yes|1996|03|17}}ProdCode=17
}}{{Episode list		Title=Einstein, Famedf=yes|1996|03|18}}ProdCode=18
}}{{Episode list		Title=Inside Chernobyl Sarcophagusdf=yes|1996|03|25}}ProdCode=19
}}{{Episode list		Title=Fall-Out from Chernobyldf=yes|1996|04|01}}ProdCode=20
}}

Series 33: 1996–1997

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Science of Star Trekdf=yes|1996|08|26}}ProdCode=—
}}{{Episode list		Title=TV Is Dead, Long Live TVdf=yes|1996|11|02}}ProdCode=1
}}{{Episode list		Title=Aliens from Marsdf=yes|1996|11|11}}ProdCode=2
}}{{Episode list		Title=The Invisible Enemy (BSE Special episode)df=yes|1996|11|17}}ProdCode=—
}}{{Episode list		Title=The Human Experiment (BSE Special episode)df=yes|1996|11|18}}ProdCode=—
}}{{Episode list		Title=Living Deathdf=yes|1996|11|25}}ProdCode=3
}}{{Episode list		Title=The Time Lordsdf=yes|1996|12|02}}ProdCode=4
}}{{Episode list		Title=Molecules with Sunglassesdf=yes|1996|12|09}}ProdCode=5
}}{{Episode list		Title=Noah's Flooddf=yes|1996|12|16}}ProdCode=6
}}{{Episode list		Title=Ice Mummies 1: The Ice Maidendf=yes|1997|01|30}}ProdCode=—
}}{{Episode list		Title=Ice Mummies 2: A Life in Icedf=yes|1997|02|06}}ProdCode=—
}}{{Episode list		Title=Ice Mummies 3: Frozen in Heavendf=yes|1997|02|13}}ProdCode=—
}}{{Episode list		Title=Siamese Twinsdf=yes|1997|02|20}}ProdCode=7
}}{{Episode list		Title=Psychedelic Sciencedf=yes|1997|02|27}}ProdCode=8
}}{{Episode list		Title=Fat Cats, Thin Micedf=yes|1997|03|06}}ProdCode=9
}}{{Episode list		Title=The Shipwreckdf=yes|1997|03|13}}ProdCode=10
}}{{Episode list		Title=Genius of the Jetdf=yes|1997|03|20}}ProdCode=11
}}{{Episode list		Title=Smallpox on Death Rowdf=yes|1997|03|27}}ProdCode=12
}}{{Episode list		Title=Silent Children, New Languagedf=yes|1997|04|03}}ProdCode=13
}}{{Episode list		Title=Turned on by Dangerdf=yes|1997|04|17}}ProdCode=14
}}{{Episode list		Title=A Perfect Oil Spilldf=yes|1997|04|24}}ProdCode=15
}}{{Episode list		Title=The Great Balloon Racedf=yes|1997|05|01}}ProdCode=16
}}{{Episode list		Title=Computers Don't Bite, Inside the Internetdf=yes|1997|05|17}}ProdCode=—
}}

Series 34: 1997–1998

TitleOriginal broadcast dateEpisode{{Episode listTitle=Destination Marsdf=yes|1997|07|04}}ProdCode=—ShortSummary = The second of two programmes about the Red Planet. Traces the course of the planned manned mission to Mars, which could take place within the next twenty years. Focuses on the numerous complications involved in such a mission, from the potential physical damage caused to cosmonauts by their zero-gravity surroundings to the psychological pressures involved in the 30-month-long trip.
}}{{Episode list		Title=Mars, Death or Glory?df=yes|1997|07|05}}ProdCode=—
}}{{Episode list		Title=Crater of Deathdf=yes|1997|09|11}}ProdCode=1
}}{{Episode list		Title=Mind over Bodydf=yes|1997|09|18}}ProdCode=2
}}{{Episode list		Title=Out of Asiadf=yes|1997|09|25}}ProdCode=3
}}{{Episode list		Title=The Virus That Curesdf=yes|1997|10|09}}ProdCode=4
}}{{Episode list		Title=The Man Who Lost His Bodydf=yes|1997|10|16}}ProdCode=5
}}{{Episode list		Title=Dawn of the Clone Agedf=yes|1997|10|23}}ProdCode=6ShortSummary=The story of how and why Dolly the sheep, the first cloned copy of an adult mammal, came to be created.
}}{{Episode list		Title=The Ice Forms (Antarctica Special Edition Part 1)df=yes|1997|10|30}}ProdCode=—ShortSummary = The first of Kate O'Sullivan's trilogy of films about Antarctica. Antarctica's polar ice sheet is the highest, coldest, windiest, driest and most unforgiving place on Earth. The average temperature near the South Pole is minus 49 degrees C, winds reach over 2000km an hour and water in liquid form is scarce. Yet this hostile environment has now become the last frontier on Earth and, each year, a population of 3,000 human colonists tries to settle here. This film focuses on the risks and rigours of living in this inhospitable continent.
}}{{Episode list		Title=The Ice Lives (Antarctica Special Edition Part 2)df=yes|1997|11|06}}ProdCode=—ShortSummary = The second of Kate O'Sullivan's Antarctic trilogy. The mystery of what formed the vast continent of Antarctica has obsessed explorers since Shackleton and Scott. Piecing together evidence from the tiny amount of rock exposed above the ice, geologists have come up with a radical theory that may also predict how Antarctica will change in the future.
}}{{Episode list		Title=The Ice Melts (Antarctica Special Edition Part 3)df=yes|1997|11|13}}ProdCode=—ShortSummary = Third of Kate O'Sullivan's Antarctica trilogy. This final film is a detective story unravelled by scientists scattered on the ice sheet, trying to understand the mechanisms that control it.
}}{{Episode list		Title=Crashdf=yes|1998|01|12}}ProdCode=7
}}{{Episode list		Title=Saddam's Secretsdf=yes|1998|02|19}}ProdCode=8
}}{{Episode list		Title=Dr Miller and the Islandersdf=yes|1998|02|26}}ProdCode=9
}}{{Episode list		Title=The Rainmakerdf=yes|1998|03|05}}ProdCode=10
}}{{Episode list		Title=Hopeful Monstersdf=yes|1998|03|19}}ProdCode=11
}}{{Episode list		Title=Premature Babies, The Limits to Birthdf=yes|1998|03|26}}ProdCode=12
}}{{Episode list		Title=Darwin, The Legacydf=yes|1998|03|29}}ProdCode=—
}}{{Episode list		Title=Overkilldf=yes|1998|04|02}}ProdCode=13
}}{{Episode list		Title=The Curse of Vesuviusdf=yes|1998|04|16}}ProdCode=14
}}{{Episode list		Title=Mir Mortalsdf=yes|1998|04|23}}ProdCode=15
}}{{Episode list		Title=The Computer That Ate Hollywooddf=yes|1998|04|30}}ProdCode=16
}}{{Episode list		Title=Magic Bulletdf=yes|1998|05|07}}ProdCode=17
}}{{Episode list		Title=The Gulf War Jigsawdf=yes|1998|05|14}}ProdCode=18
}}

Series 35: 1998–1999

TitleOriginal broadcast dateEpisode{{Episode listTitle=Sexual Chemistrydf=yes|1998|09|10}}ProdCode=1
}}{{Episode list		Title=Chimps on Death Rowdf=yes|1998|10|01}}ProdCode=2
}}{{Episode list		Title=Dinosaurs in Your Gardendf=yes|1998|10|08}}ProdCode=3
}}{{Episode list		Title=Mosquito!df=yes|1998|10|15}}ProdCode=4
}}{{Episode list		Title=The Life and Times of Life and Timedf=yes|1998|10|22}}ProdCode=5
}}{{Episode list		Title=Thalidomide, A Necessary Evildf=yes|1998|10|29}}ProdCode=6
}}{{Episode list		Title=Beyond a Jokedf=yes|1998|11|05}}ProdCode=7
}}{{Episode list		Title=Longitudedf=yes|1999|01|04}}ProdCode=—
}}{{Episode list		Title=Born to Be Fat (Fat Files Special Edition Part 1)df=yes|1999|01|07}}ProdCode=—ShortSummary = First of three documentaries taking a look at the issue of obesity. 1 of 3: This programme attempts to establish why some people are destined to be big.
}}{{Episode list		Title=Fixing Fat (Fat Files Special Edition Part 2)df=yes|1999|01|14}}ProdCode=—ShortSummary = The second in a trilogy of programmes studying obesity. As the search for drugs to reduce appetite by resetting control mechanisms in the brain continues, new research uncovers the powerful food ingredients that could win the slimming war. The programme examines the lengths to which some overweight people are prepared to go in attempting to reduce their size, from stomach stapling to the ingestion of dangerous drugs.
}}{{Episode list		Title=Living on Air (Fat Files Special Edition Part 3)df=yes|1999|01|21}}ProdCode=—ShortSummary = Last of a trilogy of programmes studying obesity. Examines some ground-breaking research into eating disorders like anorexia and bulimia, trying to establish if they are inherited. The discovery of a group of anorexics in a most unlikely place seems to put paid to the theory that the disease is the product of western's society's increased levels of stress.
}}{{Episode list		Title=From Here to Infinitydf=yes|1999|01|28}}ProdCode=8
}}{{Episode list		Title=Pandemicdf=yes|1999|02|04}}ProdCode=9
}}{{Episode list		Title=Elephants or Ivorydf=yes|1999|02|11}}ProdCode=10
}}{{Episode list		Title=Electric Heartdf=yes|1999|02|18}}ProdCode=11
}}{{Episode list		Title=Sudden Deathdf=yes|1999|02|25}}ProdCode=12
}}{{Episode list		Title=New Star in Orbitdf=yes|1999|03|11}}ProdCode=13
}}{{Episode list		Title=New Asteroid Dangerdf=yes|1999|03|18}}ProdCode=14
}}{{Episode list		Title=Skeleton Keydf=yes|1999|03|25}}ProdCode=15
}}{{Episode list		Title=Designer Babiesdf=yes|1999|04|07}}ProdCode=16
}}{{Episode list		Title=Wings of Angelsdf=yes|1999|08|01}}ProdCode=17
}}

Series 36: 1999–2000

TitleOriginal broadcast dateEpisode{{Episode listTitle=Atlantis Uncovered (Atlantis Special Edition Part 1)df=yes|1999|10|28}}ProdCode=—
}}{{Episode list		Title=Atlantis Reborn (Atlantis Special Edition Part 2)df=yes|1999|11|04}}ProdCode=—
}}{{Episode list		Title=Mistaken Identitydf=yes|1999|11|11}}ProdCode=1
}}{{Episode list		Title=Volcanoes of the Deepdf=yes|1999|11|18}}ProdCode=2
}}{{Episode list		Title=Anatomy of an Avalanchedf=yes|1999|11|25}}ProdCode=3
}}{{Episode list		Title=The Midas Formuladf=yes|1999|12|02}}ProdCode=4
}}{{Episode list		Title=Breath of Lifedf=yes|2000|01|13}}ProdCode=5
}}{{Episode list		Title=Lost City of Nascadf=yes|2000|01|20}}ProdCode=6
}}{{Episode list		Title=The Diamond Makersdf=yes|2000|01|27}}ProdCode=7
}}{{Episode list		Title=Supervolcanosdf=yes|2000|02|03}}ProdCode=8
}}{{Episode list		Title=Miracle in Orbitdf=yes|2000|02|10}}ProdCode=9
}}{{Episode list		Title=Complete Obsession: Body Dysmorphiadf=yes|2000|02|17}}ProdCode=10
}}{{Episode list		Title=Living Forever (Life and Death in the 21st Century Special Edition Part 1)df=yes|2000|01|04}}ProdCode=—
}}{{Episode list		Title=Future Plagues (Life and Death in the 21st Century Special Edition Part 2)df=yes|2000|01|05}}ProdCode=—
}}{{Episode list		Title=Designer Babies (Life and Death in the 21st Century Special Edition Part 3)df=yes|2000|01|06}}ProdCode=—ShortSummary = This episode originally aired on 7 April 1999 under the title Designer Babies.[61]
}}{{Episode list		Title=Is GM Safe?df=yes|2000|03|09}}ProdCode=11
}}{{Episode list		Title=Planet Huntersdf=yes|2000|03|16}}ProdCode=12
}}{{Episode list		Title=Constant Craving: The Science of Addictiondf=yes|2000|03|30}}ProdCode=13
}}{{Episode list		Title=Moon Childrendf=yes|2000|04|04}}ProdCode=14
}}

Series 37: 2000–2001

TitleOriginal broadcast dateEpisode{{Episode listTitle=Inside the Internetdf=yes|2000|06|10}}ProdCode=—
}}{{Episode list		Title=Science Zone, Aliens from Marsdf=yes|2000|06|27}}ProdCode=—
}}{{Episode list		Title=Mega-Tsunami, Wave of Destructiondf=yes|2000|10|12}}ProdCode=1ShortSummary=Horizon investigates an extremely rare and destructive phenomenon that strikes every few thousand years: a mega-tsunami.
}}{{Episode list		Title=Conjoined Twinsdf=yes|2000|10|19}}ProdCode=2ShortSummary=Separating conjoined twins is one of the most challenging operations a surgeon can face. Horizon examines the dilemmas which confront doctors and parents.
}}{{Episode list		Title=The Lost World of Lake Vostokdf=yes|2000|10|26}}ProdCode=3ShortSummary=Horizon investigates Lake Vostok, a vast and ancient lake deep beneath the Antarctic ice sheet.
}}{{Episode list		Title=Vanished, The Plane That Disappeareddf=yes|2000|11|02}}ProdCode=4ShortSummary=Horizon follows an expedition to the Andes where wreckage from missing 1947 passenger plane Star Dust mysteriously reappeared.
}}{{Episode list		Title=The Secret Treasures of Zeugmadf=yes|2000|11|09}}ProdCode=5ShortSummary=In the summer of 2000 the Roman city of Zeugma all but disappeared under the flood waters of the Birecik Dam. Horizon tells the story of a team of archaeologists' final visit, struggling to save what they could before the dam waters rose.
}}{{Episode list		Title=The Valley of Life or Deathdf=yes|2000|11|16}}ProdCode=6ShortSummary=An investigation of why circumcised children from the Lozi and Luvale Tribes of Africa appear to have much reduced HIV infection rates.
}}{{Episode list		Title=Extreme Dinosaursdf=yes|2000|11|23}}ProdCode=7ShortSummary=Huge plant- and meat-eaters have been unearthed in Argentina along with evidence that the mega-carnivores hunted together in packs.
}}{{Episode list		Title=Supermassive Black Holesdf=yes|2000|11|30}}ProdCode=8ShortSummary=Horizon investigates growing evidence that the ultimate force of cosmological destruction - a supermassive black hole - may in fact breathe life into every galaxy in the Universe.
}}{{Episode list		Title=The Boy Who Was Turned into a Girldf=yes|2000|12|07}}ProdCode=9ShortSummary=The extraordinary story of Canadian Bruce Reimer who was surgically turned into a girl after birth, offering a fascinating insight into what makes us male and female.
}}{{Episode list		Title=Atlantis Reborn Againdf=yes|2000|12|14}} ShortSummary = This episode is a re-edited version of Atlantis Reborn after Broadcasting Standards Commission ruled that the original special episode broadcast on 4 November 1999 was unfair to the author Graham Hancock.[62]ProdCode=10
}}{{Episode list		Title=Life on Mars (Mars Special Episode Part 1)df=yes|2001|01|11}}ProdCode=—
}}{{Episode list		Title=Destination Mars (Mars Special Episode Part 2)df=yes|2001|01|18}}ProdCode=—
}}{{Episode list		Title=The Mystery of the Miami Circledf=yes|2001|01|25}}ProdCode=11ShortSummary=After demolishing a building in Miami in 1998, workers discover a perfectly preserved circle of large holes, almost 13 metres across. Horizon follows the investigations to determine the origin of the mysterious circle, concluding that it is the remains of a forgotten tribe called the Tequesta.
}}{{Episode list		Title=The Missing Linkdf=yes|2001|02|01}}ProdCode=12ShortSummary=Horizon investigates how a small jawbone could explain how, 360 million years ago, a slimy fish-like creature grew legs and walked onto the land to become our ancestor.
}}{{Episode list		Title=Killer Algaedf=yes|2001|02|08}}ProdCode=13ShortSummary=The story of caulerpa taxifolia, an algae that has caused devastating ecological changes in some marine habitats.
}}{{Episode list		Title=Ecstasy and Agonydf=yes|2001|02|15}}ProdCode=14ShortSummary=Horizon investigates whether the drug ecstasy could be used to treat the symptoms of Parkinson's Disease.
}}{{Episode list		Title=Snowball Earthdf=yes|2001|02|22}}ProdCode=15ShortSummary=Horizon investigates a theory that for millions of years the Earth was entirely smothered in ice, stretching from the poles to the tropics.
}}{{Episode list		Title=Taming the Problem Childdf=yes|2001|03|08}}ProdCode=16ShortSummary=Two disruptive children are followed through a controversial treatment regime.
}}

Series 38: 2001–2002

TitleOriginal broadcast dateEpisode{{Episode listTitle=What Sank the Kursk?df=yes|2001|08|08}}ProdCode=—
}}{{Episode list		Title=The Mystery of the Persian Mummydf=yes|2001|09|20}}ProdCode=1
}}{{Episode list		Title=The Ape That Took Over the Worlddf=yes|2001|10|04}}ProdCode=2
}}{{Episode list		Title=Life Blooddf=yes|2001|10|11}}ProdCode=3
}}{{Episode list		Title=The Death Stardf=yes|2001|10|18}}ProdCode=4
}}{{Episode list		Title=Cloning the First Humandf=yes|2001|10|25}}ProdCode=5
}}{{Episode list		Title=Helike, The Real Atlantisdf=yes|2002|01|10}}ProdCode=6
}}{{Episode list		Title=Volcano Helldf=yes|2002|01|17}}ProdCode=7
}}{{Episode list		Title=Fatbustersdf=yes|2002|01|24}}ProdCode=8
}}{{Episode list		Title=The Lost Pyramids of Caraldf=yes|2002|01|31}}ProdCode=9
}}{{Episode list		Title=Death of the Icemandf=yes|2002|02|07}}ProdCode=10
}}{{Episode list		Title=Parallel Universesdf=yes|2002|02|14}}ProdCode=11
}}{{Episode list		Title=The Dinosaur That Fooled the Worlddf=yes|2002|02|21}}ProdCode=12
}}{{Episode list		Title=The Fall of the World Trade Centerdf=yes|2002|03|07}}ProdCode=13
}}{{Episode list		Title=Archimedes' Secretdf=yes|2002|03|14}}ProdCode=14
}}{{Episode list		Title=The Mystery of the Jurassicdf=yes|2002|03|28}}ProdCode=15
}}{{Episode list		Title=Killer Lakesdf=yes|2002|04|04}}ProdCode=16
}}{{Episode list		Title=The A6 Murderdf=yes|2002|05|16}}ProdCode=17
}}{{Episode list		Title=The England Patientdf=yes|2002|05|23}}ProdCode=18
}}

Series 39: 2002–2003

Horizon Revisited was broadcast on BBC Four and shown between 2002 and 2003. Each of the seven episodes takes information and clips from previous edition of Horizon and updates them with current thinking on each of the topics at hand. These are similar in format to the current 'Horizon Guide' special episodes.

TitleOriginal broadcast dateEpisode{{Episode listTitle=Horizon Revisited, A Tale of Two Feathersdf=yes|2002|10|18}}ProdCode=—
}}{{Episode list		Title=Horizon Revisited, Mega Tsunami: Coming to a Beach near Youdf=yes|2002|10|25}}ProdCode=—
}}{{Episode list		Title=Freak Wavedf=yes|2002|11|14}}ProdCode=1ShortSummary=Horizon examines how the mariners' mythical wall of water could indeed be a quantum physics reality.
}}{{Episode list		Title=Stone Age Columbusdf=yes|2002|11|21}}ProdCode=2ShortSummary=Flint tools found on both sides of the Atlantic ocean suggest a whole new version of North American prehistory.
}}{{Episode list		Title=Homeopathy, The Testdf=yes|2002|11|26}}ProdCode=3ShortSummary=Horizon conducts its own experiment to see if the alternative medicine has any scientific basis.
}}{{Episode list		Title=Horizon Revisited, Back to the Dark Agesdf=yes|2002|11|29}}ProdCode=—
}}{{Episode list		Title=The Day The Earth Nearly Dieddf=yes|2002|12|05}}ProdCode=4ShortSummary=Long before the dinosaurs came and went, the Permian Extinction, 300 million years ago killed 95% of all life on Earth.
}}{{Episode list		Title=Horizon Revisited, Dawn of the Dinosaursdf=yes|2002|12|06}}ProdCode=—
}}{{Episode list		Title=The Secret of El Dorado – Discovery of Terra Pretadf=yes|2002|12|19}}ProdCode=5ShortSummary=The Amazon soil offers a prehistoric clue to the truth behind the 'cities of gold' and a possible answer to rainforest destruction.
}}{{Episode list		Title=The Mystery of Easter Islanddf=yes|2003|01|09}}ProdCode=6ShortSummary=Where did the inhabitants of Easter Island come from and how did they create its celebrated stone statues?
}}{{Episode list		Title=Living Nightmaredf=yes|2003|01|16}}ProdCode=7ShortSummary=People with narcolepsy fall asleep all the time. Could their condition offer us all a route to a future without tiredness?
}}{{Episode list		Title=Averting Armageddondf=yes|2003|01|23}}ProdCode=8ShortSummary=Horizon examines the effects of a major asteroid collision with the earth.
}}{{Episode list		Title=Dirty Bombdf=yes|2003|01|30}}ProdCode=9ShortSummary=An investigation of the effects that a Dirty bomb would have on London if it were exploded in Trafalgar Square.
}}{{Episode list		Title=Sexual Chemistrydf=yes|2003|02|13}}ProdCode=10ShortSummary=The search for a female equivalent of the drug Viagra.
}}{{Episode list		Title=The Day We Learned to Thinkdf=yes|2003|02|20}}ProdCode=11ShortSummary=A 77,000-year-old fragment of paint in Blombos Cave raises important questions about human evolution.[63]
}}{{Episode list		Title=Trial and Error, The Rise and Fall of Gene Therapydf=yes|2003|02|27}}ProdCode=12ShortSummary=An investigation into gene therapy in which diseases caused by genetic anomalies could be eradicated.
}}{{Episode list		Title=Horizon Revisited, You Do as You Are Told: Jonathan Miller and the Milgram Experimentdf=yes|2003|02|27}}ProdCode=—
}}{{Episode list		Title=Earthquake Stormsdf=yes|2003|03|06}}ProdCode=13ShortSummary=A new theory could help save thousands of lives by predicting impending earthquakes.
}}{{Episode list		Title=Horizon Revisited, The Human Genome Projectdf=yes|2003|03|06}}ProdCode=—
}}{{Episode list		Title=Horizon Revisited, Michael Adler on AIDSdf=yes|2003|03|13}}ProdCode=—
}}{{Episode list		Title=Life on Marsdf=yes|2003|03|27}}ProdCode=14ShortSummary=Recent discoveries have shown that Mars has all the ingredients for life, including water, so could life be present there?
}}{{Episode list		Title=The Secret Life of Cavesdf=yes|2003|04|03}}ProdCode=15ShortSummary=Horizon investigates the discovery of extreme rock-eating microbes - a testimony from primordial Earth and a glimpse of life elsewhere in the Solar System.
}}{{Episode list		Title=God on the Braindf=yes|2003|04|17}}ProdCode=16ShortSummary=Investigations into temporal lobe epilepsy seem to suggest that our brains are naturally programmed to believe in religion.
}}{{Episode list		Title=Flight 587df=yes|2003|05|08}}ProdCode=17ShortSummary=Why did American Airlines Flight 587 crash into a suburb of New York City in November 2001?
}}{{Episode list		Title=SARS, The True Storydf=yes|2003|05|29}}ProdCode=18ShortSummary=Was the response to the Severe Acute Respiratory Syndrome outbreak of 2003 appropriate?
}}

Series 40: 2003–2004

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Big Chilldf=yes|2003|11|13}}ProdCode=1
}}{{Episode list		Title=The Bible Codedf=yes|2003|11|20}}ProdCode=2
}}{{Episode list		Title=Last Flight of the Columbiadf=yes|2003|11|27}}ProdCode=3
}}{{Episode list		Title=The Hunt for the AIDS Vaccinedf=yes|2003|12|04}}ProdCode=4
}}{{Episode list		Title=Percy Pilcher's Flying Machinedf=yes|2003|12|11}}ProdCode=5ShortSummary = To mark the hundredth anniversary of the Wright brothers inaugural flight, Horizon tells the story of Percy Pilcher, an Englishman who could have been the first person to fly a powered aircraft. In 1899, four years before the Wright brothers, he had constructed his own aeroplane. But on the day it was due to take off, technical problems led him to fly another aircraft - a decision that ended in a fatal crash. Now, with a team of historians, aviation experts, and its own test pilot, Horizon painstakingly rebuilds Pilcher's flying machine to it to the test.[64]
}}{{Episode list		Title=Time Tripdf=yes|2003|12|18}}ProdCode=6
}}{{Episode list		Title=The Demonic Apedf=yes|2004|01|08}}ProdCode=7
}}{{Episode list		Title=The Moscow Theatre Siegedf=yes|2004|01|15}}ProdCode=8
}}{{Episode list		Title=The Atkins Dietdf=yes|2004|01|22}}ProdCode=9
}}{{Episode list		Title=Secrets of the Star Discdf=yes|2004|01|29}}ProdCode=10ShortSummary = This is the extraordinary story of how a small metal disc is rewriting the epic saga of how civilisation first came to Europe, 3600 years ago.
}}{{Episode list		Title=The Dark Secret of Hendrik Schöndf=yes|2004|02|05}}ProdCode=11
}}{{Episode list		Title=Thalidomide, A Second Chance?df=yes|2004|02|12}}ProdCode=12
}}{{Episode list		Title=Diamond Labsdf=yes|2004|03|04}}ProdCode=13
}}{{Episode list		Title=T. Rex, Warrior or Wimp?df=yes|2004|03|11}}ProdCode=14
}}{{Episode list		Title=Project Poltergeistdf=yes|2004|03|18}}ProdCode=15
}}{{Episode list		Title=The Truth of Troydf=yes|2004|03|25}}ProdCode=16ShortSummary = Since 1988 Professor Manfred Korfmann has been excavating the site of Troy. He has made various discoveries - how large the city was, how well it was defended and that there was once a great battle there at the time that experts believe the Trojan war occurred. But who had attacked the city and why? Horizon then follows the clues - the ancient tablets written by a lost civilisation, a sunken ship rich in treasure, and the golden masks and bronze swords of a warrior people. The film reaches its conclusion in a tunnel deep beneath Troy, where Korfmann has made a discovery that may reveal the truth behind the myth.[65]
}}

Series 41: 2004–2005

TitleOriginal broadcast dateEpisode{{Episode listTitle=First Olympiandf=yes|2004|07|23}}ProdCode=—
}}{{Episode list		Title=The Truth About Vitaminsdf=yes|2004|09|16}}ProdCode=1
}}{{Episode list		Title=King Solomon's Tablet of Stonedf=yes|2004|09|22}}ProdCode=2
}}{{Episode list		Title=Derek Tastes of Earwaxdf=yes|2004|09|30}}ProdCode=3
}}{{Episode list		Title=What Really Killed the Dinosaurs?df=yes|2004|10|07}}ProdCode=4
}}{{Episode list		Title=Making Millions the Easy Waydf=yes|2004|10|14}}ProdCode=5
}}{{Episode list		Title=Saturn, Lord of the Ringsdf=yes|2004|10|21}}ProdCode=6
}}{{Episode list		Title=The Hunt for the Supertwisterdf=yes|2004|10|28}}ProdCode=7
}}{{Episode list		Title=Dr. Money and the Boy with No Penisdf=yes|2004|11|04}}ProdCode=8
}}{{Episode list		Title=Global Dimmingdf=yes|2005|01|13}}ProdCode=9
}}{{Episode list		Title=Einstein's Unfinished Symphonydf=yes|2005|01|20}}ProdCode=10
}}{{Episode list		Title=Einstein's Equation of Life and Deathdf=yes|2005|01|27}}ProdCode=11
}}{{Episode list		Title=Living with ADHDdf=yes|2005|02|03}}ProdCode=12
}}{{Episode list		Title=Neanderthaldf=yes|2005|02|10}}ProdCode=13
}}{{Episode list		Title=An Experiment to Save the Worlddf=yes|2005|02|17}}ProdCode=14
}}{{Episode list		Title=Who's Afraid of Designer Babies?df=yes|2005|02|24}}ProdCode=15ShortSummary = Featured in the episode were French Anderson - USC School of Medicine, Philip Bereano - University of Washington and Keith Campbell - Roslin Institute 1991-97 who was a member of the team that team that cloned Dolly the sheep
}}{{Episode list		Title=The Lost Civilisation of Perudf=yes|2005|03|03}}ProdCode=16
}}{{Episode list		Title=The Next Megaquakedf=yes|2005|05|22}}ProdCode=17
}}{{Episode list		Title=Does the MMR Jab Cause Autism?df=yes|2005|05|29}}ProdCode=18
}}{{Episode list		Title=Malaria, Defeating the Cursedf=yes|2005|06|05}}ProdCode=19
}}

Series 42: 2005–2006

TitleOriginal broadcast dateEpisode{{Episode listTitle=Tsunami, Naming the Deaddf=yes|2005|09|08}}ProdCode=1
}}{{Episode list		Title=The Hawking Paradoxdf=yes|2005|09|15}}ProdCode=2
}}{{Episode list		Title=The Mystery of the Human Hobbitdf=yes|2005|09|22}}ProdCode=3
}}{{Episode list		Title=The Doctor Who Makes People Walk Again?df=yes|2005|09|29}}ProdCode=4
}}{{Episode list		Title=Could Fish Make My Child Smart?df=yes|2005|10|06}}ProdCode=5ShortSummary = Examining the evidence of what omega 3 can do.
}}{{Episode list		Title=Madagascar, A Treetop Odysseydf=yes|2005|10|13}}ProdCode=6
}}{{Episode list		Title=Titan, A Place Like Home?df=yes|2005|10|20}}ProdCode=7
}}{{Episode list		Title=The 7/7 Bombers, A Psychological Investigationdf=yes|2005|10|27}}ProdCode=8
}}{{Episode list		Title=The Ghost in Your Genesdf=yes|2005|11|03}}ProdCode=9
}}{{Episode list		Title=The Life and Times of El Niñodf=yes|2006|01|03}}ProdCode=10
}}{{Episode list		Title=Space Touristsdf=yes|2006|01|12}}ProdCode=11
}}{{Episode list		Title=Waiting for a Heartbeatdf=yes|2006|01|19}}ProdCode=12
}}{{Episode list		Title=A War on Sciencedf=yes|2006|01|26}}ProdCode=13
}}{{Episode list		Title=The Lost City of New Orleansdf=yes|2006|02|02}}ProdCode=14
}}{{Episode list		Title=Most of Our Universe Is Missingdf=yes|2006|02|09}}ProdCode=15
}}{{Episode list		Title=Winning Gold in 2012df=yes|2006|03|18}}ProdCode=—
}}{{Episode list		Title=The Woman Who Thinks Like a Cowdf=yes|2006|06|08}}ProdCode=16ShortSummary = The incredible story of Dr Temple Grandin who has a legendary ability to understand animal behaviour in a way that nobody else can. She is convinced she experiences the world much as an animal does and that it's all down to her autistic brain. Though Grandin didn't learn to speak until she was five, at nearly 60 she's an Associate Professor of Animal Science and the most famous autistic woman on the planet. Horizon follows her remarkable journey to global acclaim.
}}{{Episode list		Title=The Genius Sperm Bankdf=yes|2006|06|15}}ProdCode=17
}}{{Episode list		Title=Bye Bye, Planet Plutodf=yes|2006|06|22}}ProdCode=18
}}{{Episode list		Title=We Love Cigarettesdf=yes|2006|06|29}}ProdCode=19
}}{{Episode list		Title=Nuclear Nightmaresdf=yes|2006|07|13}}ProdCode=20
}}{{Episode list		Title=Tutankhamun's Fireballdf=yes|2006|07|20}}ProdCode=21
}}

Series 43: 2006–2007

TitleOriginal broadcast dateEpisode{{Episode listTitle=Survivors Guide to Plane Crashesdf=yes|2006|10|03}}ProdCode=1ShortSummary = Every day across the world, more than 3 million people catch a plane. Yet despite it being the safest form of travel, many of us are terrified of flying and what we fear most is crashing and dying. Most people believe that if they're in a plane crash their time is up, in fact the truth is surprisingly different. Over 90% of plane crashes have survivors and there are many things you can do to increase your chances of staying alive. We have spoken to aviation safety experts, crash investigators as well as plane crash survivors - and put together the 'ultimate survivors guide to plane crashes'. Visit the links below to find out more.[66]
}}{{Episode list		Title=Chimps Are People Toodf=yes|2006|10|10}}ProdCode=2ShortSummary = Danny Wallace is on a mission to convince the world that chimps are people too. He believes the time has come to make our hairy relatives part of the family. Our primate brethren share 99.4% of our crucial DNA and are more closely related to us than they are to gorillas. This being so, should they be afforded the same rights as people? The reason for this scientific showdown is simple. If chimps can communicate, cook and reason, then how different are they to humans? Armed with the latest scientific evidence, Danny travels the globe to quiz primatologists, philosophers and animal rights lawyers to investigate whether or not chimps should be classed as people.[67]
}}{{Episode list		Title=The World's First Face Transplantdf=yes|2006|10|17}}ProdCode=3ShortSummary = In November 2005, 37-year-old mother of two Isabelle Dinoire became the first person in the world to receive a new face. The decision made by French surgeons to perform the operation went against the findings of almost every other ethical committee in the world and has since sparked a fierce debate over the ethics of the operation. With the long-term effects still unknown, do the risks outweigh the benefits? Are face transplants really in the best interest of the patient?[68]
}}{{Episode list		Title=Human Version 2.0df=yes|2006|10|24}}ProdCode=4ShortSummary = Meet the scientific prophets who claim we are on the verge of creating a new type of human - a human v2.0. It's predicted that by 2029 computer intelligence will equal the power of the human brain. Some believe this will revolutionise humanity - we will be able to download our minds to computers extending our lives indefinitely. Others fear this will lead to oblivion by giving rise to destructive ultra intelligent machines. One thing they all agree on is that the coming of this moment - and whatever it brings - is inevitable.[69]
}}{{Episode list		Title=The Great Robot Racedf=yes|2006|10|31}}ProdCode=5ShortSummary = We follow 20 robot cars on a remarkable race across the Nevada desert. These cars drive themselves. There are no drivers and no remote controls, they must navigate entirely on their own. The first time the race was run, the most successful entrant only made it seven miles into the 130 mile course. Will this year's robots do any better? And will any cross the finishing line and claim the two-million-dollar prize? It's a story of set-backs and crashes, as a variety of teams compete to solve one of the hardest problems in robotics.[70]
}}{{Episode list		Title=Pandemicdf=yes|2006|11|07}}ProdCode=6ShortSummary = H5N1 Bird Flu jumps the species barrier and becomes a global pandemic. This drama documentary narrated by Sean Pertwee, based in Cambodia, USA and the UK, explores what is known so far about avian flu and looks at what might happen if a human pandemic occurs.
}}{{Episode list		Title=We Are the Aliensdf=yes|2006|11|14}}ProdCode=7ShortSummary = Clouds of alien life forms are sweeping through outer space and infecting planets with life – it may not be as far-fetched as it sounds. The idea that life on Earth came from another planet has been around as a modern scientific theory since the 1960s when it was proposed by Fred Hoyle and Chandra Wickramasinghe. At the time they were ridiculed for their idea – known as panspermia. But now, with growing evidence, it's back in vogue and even being studied by NASA. We meet the scientists on a mission to get to the bottom of the beginnings of life on Earth - from the team in Texas who are lovingly building a robotic submarine called DEPTHX to explore a moon of Jupiter, to Southern India where they are investigating a mysterious red rain which fell for two months in 2001. According to local scientist Godfrey Louis, the rain contains biological cells unlike any he had seen before – with no DNA and the ability to replicate at 300°C. Louis has come to the conclusion that the cells are extra-terrestrial in origin.[71]
}}{{Episode list		Title=My Pet Dinosaurdf=yes|2007|03|13}}ProdCode=8ShortSummary = It's a palaeontologist's dream: the chance to live in a world where dinosaurs are not something to be dug out of the ground but are living among us. It may sound far-fetched but dinosaurs were actually rather unlucky. The meteorite impact that doomed them to extinction was an event with a probability of millions to one. What if the meteorite had missed? Had dinosaurs survived, the world today would be very different. If humans managed to survive alongside them, we wouldn't have the company of most, if not all, of the mammals with which we are familiar today. Giraffes, elephants and other mammals wouldn't have had space to evolve. Would we be hunting Hadrosaurs instead of elk? Or farming Protoceratops instead of pigs? Would dinosaurs be kept as pets? And could the brighter dinosaurs have evolved into something humanoid?[72]
}}{{Episode list		Title=The Elephant's Guide to Sexdf=yes|2007|03|20}}ProdCode=9ShortSummary = Thomas Hildebrandt possesses one of the world's most extraordinary jobs - getting the planet's endangered animals in the mood for love. The planet's creatures are facing the biggest mass extinction since the dinosaurs were wiped out. Species are currently disappearing at up to 10,000 times the natural rate. Coming to the rescue are men like Dr Hildebrandt and his team. They are world leaders in the art of animal manipulation. The billions of pounds spent benefiting human reproduction are now being applied to save endangered species. Techniques such as artificial insemination and IVF have been crucial to the successes in breeding giant pandas, big cats and other mammals in zoos across the world. As Thomas Hildebrandt says "Man has created this annihilation of species. It's up to man to use his ingenuity to save them."[73]
}}{{Episode list		Title=Prof Regan's Beauty Parlourdf=yes|2007|03|27}}ProdCode=10ShortSummary = Professor Lesley Regan, one of the UK's most respected medical experts, takes a scientific look at the world of makeup. Having just turned 50, Lesley happily inspects the wrinkles, age spots and broken veins on her own face in order to explore what exactly it is that makes us look old, and whether or not the ageing process can really be slowed down.[74]
}}{{Episode list		Title=Mad but Gladdf=yes|2007|04|03}}ProdCode=11ShortSummary = Examining award-winning pianist Nick van Bloss's life with Tourette's, and how the symptoms of his illness disappeared when he channelled his energy into playing the instrument. But was his illness the real cause of his success? This programme speaks with scientists who believe that genius can be traced to a person's chemistry, and attempts to determine whether Nick's brain patterns dictate the unique way in which he views the world.[75]
}}{{Episode list		Title=Moon for Saledf=yes|2007|04|10}}ProdCode=12ShortSummary = Across the globe, scientists and entrepreneurs are gearing up for the second Moon race - colonisation. This programme speaks to Nevada businessman Dennis Hope, who has sold lunar real estate to nearly four million people, including George Lucas, John Travolta, Tom Hanks and George W Bush. Plus an investigation into scientific claims that the helium-3 gas found in lunar soil could be used to create a new source of pollution-free energy on Earth.[76]
}}{{Episode list		Title=Battle of the Brainsdf=yes|2007|04|17}}ProdCode=13ShortSummary = The most popular way in which human intelligence is measured is the 10 test, but is this the most effective? A growing number of psychologists argue that the assessment only tells half the story because no-one can quite agree on what intelligence is. After an examination of the most recent theories, this programme conducts an experiment on seven highly-qualified people from different occupations, including a fighter pilot, a Wall Street trader, a chess grandmaster and a quantum physicist. Each is put through a series of tests based on the latest research to determine who has the highest intelligence. But are the results conclusive?[77]
}}{{Episode list		Title=Skyscraper Fire Fightersdf=yes|2007|04|24}}ProdCode=14ShortSummary = A fire in a skyscraper is one of the greatest challenges known to firefighters, and the decision to send crews into these towering infernos can result in tragic consequences. However, after ten years of research, Edinburgh University's Professor Jose Torero claims to have invented a revolutionary new method of protecting firefighters that has the potential to save thousands of lives. This programme takes an in-depth look at Torero's system in an attempt to see whether it could, as he believes, give man the upper hand against nature.[78]
}}{{Episode list		Title=The Six Billion Dollar Experimentdf=yes|2007|05|01}}ProdCode=15
}}{{Episode list		Title=How to Commit the Perfect Murderdf=yes|2007|05|08}}ProdCode=16ShortSummary = With the help of forensic science most crimes can be solved. But most criminals have not approached their crimes scientifically.
}}{{Episode list		Title=Professor Regan's Supermarket Secretsdf=yes|2007|05|31}}ProdCode=17ShortSummary = Probiotic, superfood, organic: what do all these labels on food mean, apart from making a product more expensive? Professor Lesley Regan, who tested beauty products in a previous episode, tests a variety of supermarket products for their supposed health benefits.
}}

Series 44: 2007–2008

TitleOriginal broadcast dateEpisode{{Episode listTitle=Everest: Doctors in the Death Zone Part 1df=yes|2007|09|23}}ProdCode=—ShortSummary = Doctors embarking on a scientific expedition to Mount Everest. From tented laboratories pitched in minus 25-degree temperatures, the results of their experiments could lead to a greater understanding of the human body and revolutionise the treatment of patients in intensive care.
}}{{Episode list		Title=Everest: Doctors in the Death Zone Part 2df=yes|2007|09|30}}ProdCode=—ShortSummary = This documentary in the Horizon strand follows Dr Mike Grocott and his team, whose greatest goal is to discover a genetic link that allows some to survive low oxygen while others die. But to do this they must push themselves to the extreme. Standing 8,850m in the sky, Everest is in the "death zone" and by climbing into this hostile environment they will be putting their own lives on the line.[79]
}}{{Episode list		Title=How to Kill a Human Beingdf=yes|2008|01|15}}ProdCode=1ShortSummary = Former Conservative MP Michael Portillo pushes his body to the brink of death in an investigation into the science of execution. As the American Supreme Court examines whether the lethal injection is causing prisoners to die in unnecessary pain, Michael sets out to find a solution which is fundamentally humane. Armed with startling new evidence, Michael considers a completely new approach. Will it be the answer? There is only one way to find out – to experience it himself.
}}{{Episode list		Title=Total Isolationdf=yes|2008|01|22}}ProdCode=2ShortSummary = For the first time in 40 years Horizon re-creates a controversial sensory deprivation experiment. Six ordinary people are taken to a nuclear bunker and left alone for 48 hours. Three subjects are left alone in dark, sound-proofed rooms, while the other three are given goggles and foam cuffs, while white noise is piped into their ears. The original experiments carried out in the 1950s and 60s by leading psychologist Prof Donald Hebb, was thought by many in the North American political and scientific establishment to be too cruel and were discontinued. Prof Ian Robbins, head of trauma psychology at St George's Hospital, Tooting, has been treating some of the British Guantanamo detainees and the victims of torture who come to the UK from across the world. Now he evaluates the volunteers as their brains undergo strange alterations.[80]
}}{{Episode list		Whatonearthsectionlink}}df=yes|2008|01|29}}ProdCode=3ShortSummary = Particle physicist and ex Ream keyboard player Dr Brian Cox wants to know why the Universe is built the way it is. He believes the answers lie in the force of gravity. But Newton thought gravity was powered by God, and even Einstein failed to completely solve it. Heading out with his film crew on a road trip across the USA, Brian fires lasers at the moon in Texas, goes mad in the desert in Arizona, encounters the bending of space and time at a maximum security military base, tries to detect ripples in our reality in the swamps of Louisiana and searches for hidden dimensions just outside Chicago.[81]
}}{{Episode list		Title=Is Alcohol Worse than Ecstasy?df=yes|2008|02|05}}ProdCode=4ShortSummary = Recent research has analysed the link between the harmful effects of drugs relative to their current classification by law with some startling conclusions. Perhaps most startling of all is that alcohol, solvents and tobacco (all unclassified drugs) are rated more dangerous than ecstasy, 4-MTA and LSD (all class A drugs). If the current ABC system is retained, alcohol would be rated a class A drug and tobacco class B. The scientists involved, including members of the government's top advisory committee on drug classification, have produced a rigorous assessment of the social and individual harm caused by 20 of the UK's most dangerous drugs and believe this should form the basis of future ranking. They think the current ABC system is arbitrary and not based on any scientific evidence. The drug policies have remained unchanged over the last 40 years so should they be reformed in the light of new research?[82]
}}{{Episode list		Title=How to Make Better Decisionsdf=yes|2008|02|12}}ProdCode=5ShortSummary = We are bad at making decisions. According to science, our decisions are based on oversimplification, laziness and prejudice. And that's assuming that we haven't already been hijacked by our surroundings or led astray by our subconscious! Featuring exclusive footage of experiments that show how our choices can be confounded by temperature, warped by post-rationalisation and even manipulated by the future, Horizon presents a guide to better decision making, and introduces you to mathematician Garth Sundem, who is convinced that conclusions can best be reached using simple maths and a pencil![83]
}}{{Episode list		Title=How to Live to Be 101df=yes|2008|02|19}}ProdCode=6ShortSummary = The quest to live longer has been one of humanities oldest dreams, but while scientists have been searching, a few isolated communities have stumbled across the answer. On the remote Japanese island of Okinawa, In the Californian town of Loma Linda and in the mountains of Sardinia people live longer than anywhere else on earth. In these unique communities a group of scientists have dedicated their lives to trying to uncover their secrets. Horizon takes a trip around the globe to meet the people who can show us all how to live longer, healthier lives.[84]
}}{{Episode list		Title=Are We Alone in the Universe?df=yes|2008|03|04}}ProdCode=7ShortSummary = For fifty years, the Search for Extra Terrestrial Intelligence has been scanning the galaxy for a message from an alien civilisation. So far to no avail, but a recent breakthrough suggests they may one day succeed. Horizon joins the planet hunters who've discovered a new world called Gliese 581 c. It is the most Earth-like planet yet found around another star and may have habitats capable of supporting life. NASA too hopes to find fifty more Earth-like planets by the end of the decade, all of which dramatically increases the chance that alien life has begun elsewhere in the galaxy.[85]
}}{{Episode list		Title=How Much Is Your Dead Body Worth?df=yes|2008|03|18}}ProdCode=8ShortSummary = When veteran broadcaster Alistair Cooke died in 2004 few suspected that he was yet to uncover his greatest story. What happened to his body as it lay in a funeral home would reveal a story of modern day grave robbery and helped smash a body-snatching ring that had made millions of dollars by chopping up and selling-off over 1000 bodies. Dead bodies have become big business. Each year millions of people's lives are improved by the use of tissue from the dead. Bodies are used to supply spare parts, and for surgeons to practice on. Horizon investigates the medical revolution that has created an almost insatiable demand for body parts and uncovers the growing industry and grisly black market that supplies human bodies for a price.[86]
}}{{Episode list		Title=How Does Your Memory Work?df=yes|2008|03|25}}ProdCode=9ShortSummary = You might think that your memory is there to help you remember facts, such as birthdays or shopping lists. If so, you would be very wrong. The ability to travel back in time in your mind is, perhaps, your most remarkable ability, and develops over your lifespan. Horizon takes viewers on an extraordinary journey into the human memory. From the woman who is having her most traumatic memories wiped by a pill, to the man with no memory, this film reveals how these remarkable human stories are transforming our understanding of this unique human ability. The findings reveal the startling truth that everyone is little more than their own memory.[87]
}}

Series 45: 2008–2009

TitleOriginal broadcast dateEpisode{{Episode listTitle=Lost Horizons: The Big Bangdf=yes|2008|09|04}}ProdCode=—ShortSummary = The theory that the universe began from nothing has not always been accepted with the same conviction it is today. Professor Jim Al-Khalili looks through 50 years of the BBC science archive to explain how scientists have pieced together the popular theory by using curious horn-shaped antennae, U-2 spy planes and particle accelerators.
}}{{Episode list		Title=The Big Bang Machinedf=yes|2008|09|04}}ProdCode=—
}}{{Episode list		Title=The President's Guide to Sciencedf=yes|2008|09|16}}ProdCode=1
}}{{Episode list		Title=How Mad Are You? Part 1df=yes|2008|11|11}}ProdCode=2
}}{{Episode list		Title=How Mad Are You? Part 2df=yes|2008|11|18}}ProdCode=3
}}{{Episode list		Title=Jimmy's GM Food Fightdf=yes|2008|11|25}}ProdCode=4ShortSummary = Jimmy Doherty, pig farmer, one-time scientist and poster-boy for sustainable food production is on a mission to find out if GM crops really can feed the world. We need to double the amount of food we produce in the next fifty years to feed the world's growing population. Are GM crops the answer? Or are they a dangerous Frankenstein technology that could start an environmental catastrophe? To find the answers Jimmy is on a journey that will take him from the vast soya plantations of Argentina to the traditional Amish farms of Pennsylvania; and from the cutting-edge technology of the GM laboratories to the banana plantations of Uganda.
}}{{Episode list		Title=Do You Know What Time It Is?df=yes|2008|12|02}}ProdCode=5ShortSummary = Particle physicist Professor Brian Cox asks, 'What time is it?' It's a simple question and it sounds like it has a simple answer. But do we really know what it is that we're asking? Brian visits the ancient Mayan pyramids in Mexico where the Maya built temples to time. He finds out that a day is never 24 hours and meets Earth's very own Director of Time. He journeys to the beginning of time, and goes beyond within the realms of string theory, and explores the very limit of time. He discovers that we not only travel through time at the speed of light, but the experience we feel as the passing of time could be an illusion.
}}{{Episode list		Title=Allergy Planetdf=yes|2008|12|09}}ProdCode=6ShortSummary = We are in the grip of an allergy epidemic. 50 years ago one in 30 were affected, but in Britain today it is closer to one in three. Why this should be is one of modern medicine's greatest puzzles. In search of answers, Horizon travels round the globe, from the remotest inhabited island to the polluted centres of California and the UK. We meet sufferers and the scientists who have dedicated their lives trying to answer the mystery of why we are becoming allergic to our world.
}}{{Episode list		Title=Where's My Robot?df=yes|2008|12|16}}ProdCode=7ShortSummary = Danny Wallace embarks on a quest to find his ideal android: one that will walk and talk just like him. During his journey to the more unlikely corners of the robotics world, Danny is introduced to a Japanese man who makes copies of himself and his daughter, and an Italian who believes he has found the key to human intelligence... in a video game.
}}{{Episode list		Title=Why Are Thin People Not Fat?df=yes|2009|01|26}}ProdCode=8ShortSummary = The world is affected by an obesity epidemic, but why is it that not everyone is succumbing? Medical science has been obsessed with this subject and is coming up with some unexpected answers. As it turns out, it is not all about exercise and diet. At the center of this programme is a controversial overeating experiment that aims to identify exactly what it is about some people that makes it hard for them to bulk up.
}}{{Episode list		Title=Cannabis: The Evil Weed?df=yes|2009|02|03}}ProdCode=9ShortSummary = Cannabis is the world's favourite drug, but also one of the least understood. Can cannabis cause schizophrenia? Is it addictive? Can it lead you on to harder drugs? Or is it simply a herb, an undervalued medicine? Addiction specialist Dr John Marsden (host of Body Hits) discovers that modern science is finally beginning to find answers to these questions. John traces the cannabis plants' birthplace in Kazakhstan; finds the origins of our sensitivity to cannabis in the simple sea squirt; and shows just what it does to our brains. He meets people who have been changed by this drug in drastically different ways – from those whose lives have been shattered to those who lives have been revived.
}}{{Episode list		Title=Why Do We Dream?df=yes|2009|02|10}}ProdCode=10ShortSummary = Horizon uncovers the secret world of our dreams. In a series of cutting-edge experiments and personal stories, we go in search of the science behind this most enduring mystery and ask: where do dreams come from? Do they have meaning? And ultimately, why do we dream? What the film reveals is that much of what we thought we knew no longer stands true. Dreams are not simply wild imaginings but play a significant part in all our lives as they affect our memories, the ability to learn, and our mental health. Most surprisingly, we find nightmares, too, are beneficial and may even explain the survival of our species.
}}{{Episode list		Title=Can We Make a Star on Earth?df=yes|2009|02|17}}ProdCode=11ShortSummary = Professor Brian Cox takes a global journey in search of the energy source of the future. Called nuclear fusion, it is the process that fuels the sun and every other star in the universe. Yet despite over five decades of effort, scientists have been unable to get even a single watt of fusion electricity onto the grid. Brian returns to Horizon to find out why. Granted extraordinary access to the biggest and most ambitious fusion experiments on the planet, Brian travels to the USA to see a high security fusion bomb testing facility in action and is given a tour of the world's most powerful laser. In South Korea, he clambers inside the reaction chamber of K-Star, the world's first super-cooled, super-conducting fusion reactor where the fate of future fusion research will be decided.
}}{{Episode list		Title=The Secret Life of Your Bodyclockdf=yes|2009|02|24}}ProdCode=12ShortSummary = Why are you more likely to have a heart attack at eight o'clock in the morning or crash your car on the motorway at two o'clock in the afternoon? Can taking your medication at the right time of day really save your life? And have you ever wondered why teenagers will not get out of bed in the morning? The answers to these questions lie in the secret world of the biological clock.
}}{{Episode list		Title=What's the Problem with Nudity?df=yes|2009|03|03}}ProdCode=13ShortSummary = What is wrong with nudity? Why are people embarrassed about their bodies? How and why did they get the way they are? Horizon takes a group of volunteers and subjects them to a series of psychological and physical tests to challenge attitudes to the naked human form. The questions raised strike at the heart of human physical and social evolution. Human beings are the only creatures that can be 'naked' - but why, how and when did people lose their fur? That question takes Horizon around the world to meet scientists from Africa to Florida, and they are finding answers in unexpected places: the chest hair of Finnish students, the genetic history of lice, and the sweat of an unusual monkey. It turns out that something everyone takes for granted may hold the key to the success of the entire human species.
}}{{Episode list		Title=How to Survive a Disasterdf=yes|2009|03|10}}ProdCode=14ShortSummary = When disaster strikes who lives and who dies is not purely a matter of luck. In every disaster, from those people face once in a lifetime, to those they face every day, there are things that can be done to increase the chances of getting out alive. Horizon has gathered a team of leading experts to produce the ultimate guide to disaster survival. Through controversial experiments, computer simulations and analysis of hundreds of survivor testimonies from plane crashes to ferry disasters and even 9/11, they will reveal what happens in the mind in the moment of crisis and how the human brain can be programmed for survival.
}}{{Episode list		Title=Who Do You Want Your Child to Be?df=yes|2009|03|17}}ProdCode=15ShortSummary = David Baddiel, father of two, sets out to answer one of the greatest questions a parent can ask: how best to educate your child. Taking in the latest scientific research, David uncovers some unconventional approaches: from the parent hot-housing his child to record-breaking feats of maths, to a school that pays hard cash for good grades. David witnesses a ground-breaking experiment that suggests a child's destiny can be predicted at four, and hears the three little words that can ruin a child's chance of success for good. He also uncovers the neurological basis for why teenagers can be stroppy and explosive and has his own brain tinkered with to experience what it is like to struggle at school. Through it all, David's quest remains true: to maximise his child's potential for success and happiness.
}}{{Episode list		Title=Why Can't We Predict Earthquakes?df=yes|2009|03|24}}ProdCode=16ShortSummary = Last century, earthquakes killed over one million, and it is predicted that this century might see ten times as many deaths. Yet when an earthquake strikes, it always takes people by surprise. So why hasn't science worked out how to predict when and where the next big quake is going to happen? This is the story of the men and women who chase earthquakes and try to understand this mysterious force of nature. Journeying to China's Sichuan Province, which still lies devastated by the earthquake that struck in May 2008, as well as the notorious San Andreas Fault in California, Horizon asks why science has so far fallen short of answering this fundamental question.
}}{{Episode list		Title=Alan and Marcus Go Forth and Multiplydf=yes|2009|03|31}}ProdCode=17ShortSummary = Ever since he was at school, actor and comedian Alan Davies has hated maths. And like many people, he is not much good at it either. But Alan has always had a sneaking suspicion that he was missing out. So, with the help of top mathematician Professor Marcus du Sautoy, Alan is going to embark on a maths odyssey. Together they visit the fourth dimension, cross the universe and explore the concept of infinity. Along the way, Alan does battle with some of the toughest maths questions of our age. But did his abilities peak 25 years ago when he got his grade C O-Level? Or will Alan be able to master the most complex maths concept there is?
}}{{Episode list		Title=How Violent Are You?df=yes|2009|05|12}}ProdCode=18ShortSummary = What makes ordinary people commit extreme acts of violence? In a thought-provoking and disturbing journey, Michael Portillo investigates one of the darker sides of human nature. He discovers what it is like to inflict pain and is driven to the edge of violence himself in an extreme sleep deprivation study. He meets men for whom violence has become an addiction and ultimately discovers that each of us could be inherently more violent than we think, and watches a replication of one of the most controversial studies in history, the Milgram study. Will study participants be willing to administer a seemingly lethal electric shock to someone they think is an innocent bystander?
}}

Series 46: 2009–2010

TitleOriginal broadcast dateEpisode{{Episode listTitle=40 Years on the Moondf=yes|2009|07|09}}ProdCode=—ShortSummary=Professor Brian Cox takes a journey through the BBC science archive to explore the story of man's relationship with the moon, from James Burke testing Nasa equipment to Neil Armstrong's first steps on the lunar surface and the dramatic tale of Apollo 13. He also asks whether international competition could help reignite the public's enthusiasm for space travel and bring about the dawn of a new space age.
}}{{Episode list		Title=Pandemic: A Horizon Guidedf=yes|2009|08|09}}ProdCode=—ShortSummary = In the wake of the swine flu outbreak, virologist Dr Mike Leahy uses over 50 years of the BBC archive to explore the history of pandemics – infectious diseases caused by bacteria, viruses and parasites. Inspired by the Horizon back catalogue, he tells the extraordinary story of smallpox, one of the most violent killers in history, as well as the success of mass vaccination and the global politics of malaria. Through the lens of television the programme charts our scientific progress from the early steps in understanding AIDS to the code-cracking of SARS and deadly predictions of bird flu. Each pandemic episode tells us something about the world and our place within it. In his journey through the ages Dr Leahy charts science's ongoing battle with nature and questions which one is winning.
}}{{Episode list		Title=Do I Drink Too Much?df=yes|2009|10|13}}ProdCode=1ShortSummary = Alcohol is by far the most widely used drug – and a dangerous one at that. So why are so many of us drinking over the recommended limits? Why does alcohol have such a powerful grip on us? How much of our relationship with this drug is written in our genes? What are the real dangers of our children drinking too young? Addiction expert John Marsden, who likes a drink, makes a professional and personal exploration of our relationship with alcohol. He undergoes physical and neurological examinations to determine its effect, and finds out why some people will find it much harder than others to resist alcohol. Even at the age of 14 there may be a way of determining which healthy children will turn into addicts. John experiments with a designer drug being developed that hopes to replicate all the benefits of alcohol without the dangers. Could this drug replace alcohol in the future?
}}{{Episode list		Title=The Secret Youdf=yes|2009|10|20}}ProdCode=2ShortSummary = With the help of a hammer-wielding scientist, Jennifer Aniston and a general anaesthetic, Professor Marcus du Sautoy goes in search of answers to one of science's greatest mysteries: how do we know who we are? While the thoughts that make us feel as though we know ourselves are easy to experience, they are notoriously difficult to explain. So, in order to find out where they come from, Marcus subjects himself to a series of probing experiments. He learns at what age our self-awareness emerges and whether other species share this trait. Next, he has his mind scrambled by a cutting-edge experiment in anaesthesia. Having survived that ordeal, Marcus is given an out-of-body experience in a bid to locate his true self. And in Hollywood, he learns how celebrities are helping scientists understand the microscopic activities of our brain. Finally, he takes part in a mind-reading experiment that both helps explain and radically alters his understanding of who he is.
}}{{Episode list		Title=Fix Medf=yes|2009|10|27}}ProdCode=3ShortSummary = Horizon follows the emotional journey of three young people with currently untreatable conditions to see if within their lifetime, they can be cured. Sophie is desperate to discover if there's a medical breakthrough which will get her walking again – a car crash after celebrating her A level results left her paralysed from the waist down. Anthony's leg was amputated after a rugby accident on the eve of his eighteenth birthday. Will he ever be able to regrow his leg? Father of four, Dean is desperate for a cure for his damaged heart to avoid an early death. They've all read the headlines about the astonishing potential of stem cells to heal the body. Now they've been given access to the pioneering scientists who could transform their lives. With so much at stake, each meeting is highly emotional as our three young people find out if science can fix them.
}}{{Episode list		Title=Who's Afraid of a Big Black Hole?df=yes|2009|11|03}}ProdCode=4ShortSummary = Black holes are one of the most destructive forces in the universe, capable of tearing a planet apart and swallowing an entire star. Yet scientists now believe they could hold the key to answering the ultimate question – what was there before the Big Bang? The trouble is that researching them is next to impossible. Black holes are by definition invisible and there's no scientific theory able to explain them. Despite these obvious obstacles, Horizon meets the astronomers attempting to image a black hole for the very first time and the theoretical physicists getting ever closer to unlocking their mysteries. It's a story that takes us into the heart of a black hole and to the very edge of what we think we know about the universe.
}}{{Episode list		Title=Why Do We Talk?df=yes|2009|11|10}}ProdCode=5ShortSummary = Talking is something that is unique to humans, yet it still remains a mystery. Horizon meets the scientists beginning to unlock the secrets of speech – including a father who is filming every second of his son's first three years in order to discover how we learn to talk, the autistic savant who can speak more than 20 languages, and the first scientist to identify a gene that makes speech possible. Horizon also hears from the godfather of linguistics, Noam Chomsky, the first to suggest that our ability to talk is innate. A unique experiment shows how a new alien language can emerge in just one afternoon, in a bid to understand where language comes from and why it is the way it is.[88]
}}{{Episode list		Title=Mars: A Horizon Guidedf=yes|2009|11|15}}ProdCode=—ShortSummary=Space expert Dr Kevin Fong draws on 45 years worth of footage from Horizon's archives, as he chronicles the efforts of scientists to reach the red planet, including the ill-fated British attempt, the Beagle. The intriguing possibility of life on Mars has prompted many of these missions, but, as yet, none of them has been successful.
}}{{Episode list		Title=How Long Is a Piece of String?df=yes|2009|11|17}}ProdCode=6ShortSummary = Alan Davies attempts to answer the proverbial question: how long is a piece of string? But what appears to be a simple task soon turns into a mind-bending voyage of discovery where nothing is as it seems. An encounter with leading mathematician Marcus du Sautoy reveals that Alan's short length of string may in fact be infinitely long. When Alan attempts to measure his string at the atomic scale, events take an even stranger turn. Not only do objects appear in many places at once, but reality itself seems to be an illusion. Ultimately, Alan finds that measuring his piece of string could – in theory at least – create a black hole, bringing about the end of the world.
}}{{Episode list		Title=How Many People Can Live on Planet Earth?df=yes|2009|12|9}}ProdCode=7ShortSummary = In a Horizon special, naturalist Sir David Attenborough investigates whether the world is heading for a population crisis. In his lengthy career, Sir David has watched the human population more than double from 2.5 billion in 1950 to nearly seven billion. He reflects on the profound effects of this rapid growth, both on humans and the environment. While much of the projected growth in human population is likely to come from the developing world, it is the lifestyle enjoyed by many in the West that has the most effect on the planet. Some experts claim that in the UK consumers use as much as two and a half times their fair share of Earth's resources. Sir David examines whether it is the duty of individuals to commit not only to smaller families, but to change the way they live for the sake of humanity and planet Earth.
}}{{Episode list		Title=The Secret Life of the Dogdf=yes|2010|01|6}}ProdCode=8ShortSummary = We have an extraordinary relationship with dogs – closer than with any other animal on the planet. But what makes the bond between us so special? Research into dogs is gaining momentum, and scientists are investigating them like never before. From the latest fossil evidence, to the sequencing of the canine genome, to cognitive experiments, dogs are fast turning into the new chimps as a window into understanding ourselves. Where does this relationship come from? In Siberia, a unique breeding experiment reveals the astonishing secret of how dogs evolved from wolves. Swedish scientists demonstrate how the human/dog bond is controlled by a powerful hormone also responsible for bonding mothers to their babies. Why are dogs so good at reading our emotions? Horizon meets Betsy, reputedly the world's most intelligent dog, and compares her incredible abilities to those of children. Man's best friend has recently gone one step further – helping us identify genes responsible for causing human diseases.
}}{{Episode list		Title=Diet: A Horizon Guidedf=yes|2010|01|07}}ProdCode=—
}}{{Episode list		Title=Why Do Viruses Kill?df=yes|2010|01|13}}ProdCode=9ShortSummary = Just months ago, the world stood in fear of an emerging new disease that threatened to kill millions. A new flu variant H1N1 had arrived. In the UK alone, 65,000 deaths were predicted. Yet to date, these dire warnings have not materialised. If this latest pandemic has taught anything, it is just how little is understood about the invisible world of viruses. But that has not stopped scientists trying. Horizon follows the leading researchers from across the world, who are attempting to unravel the many secrets of viruses to understand when and why they kill.
}}{{Episode list		Title=Pill Poppersdf=yes|2010|01|20}}ProdCode=10ShortSummary = Over a person's lifetime they are likely to be prescribed more than 14,000 pills. Antibiotics, cholesterol lowering tablets, anti-depressants, painkillers, even tablets to extend youth and improve performance in bed. These drugs perform minor miracles day after day, but how much is really known about them? Drug discovery often owes as much to serendipity as to science, and that means much is learnt about how medicines work, or even what they do, when they're taken. By investigating some of the most popular pills people pop, Horizon asks, how much can they be trusted to do what they are supposed to?
}}{{Episode list		Title=Don't Grow Olddf=yes|2010|02|03}}ProdCode=11ShortSummary = For centuries scientists have been attempting to come up with an elixir of youth. Now remarkable discoveries are suggesting that ageing is something flexible that can ultimately be manipulated. Horizon meets the scientists who are attempting to piece together why we age and more vitally for all of us, what we can do to prevent it. But which theory will prevail? Does the 95-year-old woman who smokes two packets of cigarettes a day hold the clue? Do blueberries really delay signs of ageing or is it more a question of attitude? Does the real key to controlling how we age lie with a five-year-old boy with an extraordinary ageing disease or with a self-experimenting Harvard professor? Could one of these breakthroughs really see our lives extend past 120 years?
}}{{Episode list		Title=To Infinity and Beyond...df=yes|2010|02|10}}ProdCode=12ShortSummary = By our third year, most of us will have learned to count. Once we know how, it seems as if there would be nothing to stop us counting forever. But, while infinity might seem like an perfectly innocent idea, keep counting and you enter a paradoxical world where nothing is as it seems. Mathematicians have discovered there are infinitely many infinities, each one infinitely bigger than the last. And if the universe goes on forever, the consequences are even more bizarre. In an infinite universe, there are infinitely many copies of the Earth and infinitely many copies of you. Older than time, bigger than the universe and stranger than fiction. This is the story of infinity.
}}{{Episode list		Title=What Makes a Genius?df=yes|2010|02|17}}ProdCode=13ShortSummary = Could you have come up with Einstein's theory of relativity? If not – why not? This is what Marcus du Sautoy, professor of mathematics, wants to explore. Marcus readily admits that he is no genius, but wants to know if geniuses are just an extreme version of himself – or whether their brains are fundamentally different. Marcus meets some remarkable individuals – Tommy, an obsessive artist who uses his whole house as his canvas; Derek: blind, autistic, and a pianist with apparently prodigious gifts; Claire, who is also blind, but whose brain has learnt to see using sound. Marcus is shown how babies have remarkable abilities which most of us lose as teenagers. He meets a neuroscientist who claims he has evidence of innate ability, a scientist who's identified a gene for learning, and Dr. Paulus, who has discovered how to sharpen the brain... by electrically turbo-charging it.
}}{{Episode list		Title=Did Cooking Make Us Human?df=yes|2010|03|02}}ProdCode=14ShortSummary = We are the only species on earth that cooks its food – and we are also the cleverest species on the planet. The question is: do we cook because we're clever and imaginative, or are we clever and imaginative because our ancestors discovered cooking? Horizon examines the evidence that our ancestors' changing diet and their mastery of fire prompted anatomical and neurological changes that resulted in taking us out of the trees and into the kitchen.
}}{{Episode list		Title=Is Everything We Know About the Universe Wrong?df=yes|2010|03|09}}ProdCode=15ShortSummary = There's something very odd going on in space – something that shouldn't be possible. It is as though vast swathes of the universe are being hoovered up by a vast and unseen celestial vacuum cleaner. Sasha Kashlinsky, the scientist who discovered the phenomenon, is understandably nervous: 'It left us quite unsettled and jittery' he says, 'because this is not something we planned to find'. The accidental discovery of what is ominously being called 'dark flow' not only has implications for the destinies of large numbers of galaxies – it also means that large numbers of scientists might have to find a new way of understanding the universe. Dark flow is the latest in a long line of phenomena that have threatened to rewrite the textbooks. Does it herald a new era of understanding, or does it simply mean that everything we know about the universe is wrong?
}}

Series 47: 2010–2011

TitleOriginal broadcast dateEpisode{{Episode listTitle=The End of God?: A Horizon Guide to Science and Religiondf=yes|2010|09|21}}ProdCode=—ShortSummary = Historian Dr Thomas Dixon explores BBC archive footage detailing the age-old conflict between religion and science. He highlights interviews with a diverse range of theorists, including American creationists and physicists in Geneva working with the Large Hadron Collider, and asks whether the expansion of knowledge has left no room for the concept of God in the modern world.
}}{{Episode list		Title=Back from the Deaddf=yes|2010|09|27}}ProdCode=1ShortSummary = Dr Kevin Fong investigates a pioneering technique of extreme cooling that is being used to bring people back from the dead. In the operating theatre, a patient's heart is stopped and their brain shows no activity. They are indistinguishable from someone who is dead. Yet patients can then be warmed up and brought back to life. Kevin Fong meets the doctors who have developed this procedure, finds out how it could revolutionise intensive care and trauma medicine, and meets some of the remarkable people who have been brought back from the dead.
}}{{Episode list		Title=The Death of the Oceans?df=yes|2010|10|04}}ProdCode=2ShortSummary = Sir David Attenborough reveals the findings of one of the most ambitious scientific studies of our time – an investigation into what is happening to our oceans. He looks at whether it is too late to save their remarkable biodiversity. Horizon travels from the cold waters of the North Atlantic to the tropical waters of the Great Barrier Reef to meet the scientists who are transforming our understanding of this unique habitat. Attenborough explores some of the ways in which we are affecting marine life – from over-fishing to the acidification of sea water. The film also uncovers the disturbing story of how shipping noise is deafening whales and dolphins, affecting their survival in the future.
}}{{Episode list		Title=What Happened Before the Big Bang?df=yes|2010|10|11}}ProdCode=3ShortSummary = They are the biggest questions that science can possibly ask: where did everything in our universe come from? How did it all begin? For nearly a hundred years, we thought we had the answer: a big bang some 14 billion years ago. But now some scientists believe that was not really the beginning. Our universe may have had a life before this violent moment of creation. Horizon takes the ultimate trip into the unknown, to explore a dizzying world of cosmic bounces, rips and multiple universes, and finds out what happened before the big bang.
}}{{Episode list		Title=Is Seeing Believing?df=yes|2010|10|18}}ProdCode=4ShortSummary = Horizon explores the strange and wonderful world of illusions – and reveals the tricks they play on our senses and why they fool us. We show how easy it is to trick your sense of taste by changing the colours of food and drink, explain how what you see can change what you hear, and see just how unreliable our sense of colour can be. But all this trickery has a serious purpose. It's helping scientists to create a new understanding of how our senses work – not as individual senses, but connected together. It holds the intriguing possibility that one sense could be mapped into another. This is what happened to Daniel Kish, who lost his sight as a child. He is now able to create a vision of the world by clicking his tongue which allows him to echolocate like a bat. And in a series of MRI scans, scientists are now looking to find out if Daniel's brain may have actually rewired itself enabling him to use sound to create a visual image of the world.
}}{{Episode list		Title=Miracle Cure? A Decade of the Human Genomedf=yes|2010|10|25}}ProdCode=5ShortSummary = A decade ago, scientists announced that they had produced the first draft of the human genome, the 3.6 billion letters of our genetic code. It was seen as one of the greatest scientific achievements of our age, a breakthrough that would usher in a new age of medicine. A decade later, Horizon finds out how close we are to developing the life-changing treatments that were hoped for. Horizon follows three people, each with a genetic disease, as they go behind the scenes at some of Britain's leading research labs to find out what the sequencing of the human genome has done for them – and the hope this remarkable project offers all of us.
}}{{Episode list		Title=Asteroids – The Good, the Bad and the Uglydf=yes|2010|11|03}}ProdCode=6ShortSummary = Famed for their ability to inflict Armageddon from outer space, asteroids are now revealing the secrets of how they are responsible for both life and death on our planet. Armed with an array of powerful telescopes, scientists are finding up to 3000 new asteroids every night. And some are heading our way. But astronomers have discovered that it's not the giant rocks that are the greatest danger – it's the small asteroids that pose a more immediate threat to Earth. Researchers have explained the photon propulsion that propels these rocks across space, and have discovered that some asteroids are carrying a mysterious cargo of frost and ice across the solar system that could have helped start life on earth.
}}{{Episode list		Title=Deepwater Disaster – The Untold Storydf=yes|2010|11|16}}ProdCode=7ShortSummary = Horizon reveals the untold story of the 87-day battle to kill the Deepwater Horizon oil blowout a mile beneath the waves – a crisis that became America's worst environmental disaster. Engineers and oil men at the heart of the operation talk for the first time about the colossal engineering challenges they faced and how they had to improvise under extreme pressure. They tell of how they used household junk, discarded steel boxes and giant underwater cutting shears to stop the oil. It's an operation that one insider likens to the rescue of Apollo 13.
}}{{Episode list		Title=What Makes Us Clever? A Horizon Guide to Intelligencedf=yes|2011|01|06}}ProdCode=—ShortSummary = Delving into the Horizon archives, Dallas Campbell discovers how our understanding of intelligence has transformed over the last century.
}}{{Episode list		Title=What Is One Degree?df=yes|2011|01|10}}ProdCode=8ShortSummary = Comedian Ben Miller returns to his roots as a physicist to try to answer a deceptively simple question: what is one degree of temperature? His quest takes him to the frontiers of current science as he meets researchers working on the hottest and coldest temperatures in the universe, and to a lab where he experiences some of the strangest effects of quantum physics – a place where super-cooled liquids simply pass through solid glass. Plus, Ben installs his very own Met office weather station at home.
}}{{Episode list		Title=What Is Reality?df=yes|2011|01|17}}ProdCode=9ShortSummary = There is a strange and mysterious world that surrounds us, a world largely hidden from our senses. The quest to explain the true nature of reality is one of the great scientific detective stories. Clues have been pieced together from deep within the atom, from the event horizon of black holes, and from the far reaches of the cosmos. It may be that we are part of a cosmic hologram, projected from the edge of the universe. Or that we exist in an infinity of parallel worlds. Your reality may never look quite the same again.
}}{{Episode list		Title=Science Under Attackdf=yes|2011|01|24}}ProdCode=10ShortSummary = Nobel Prize winner Sir Paul Nurse examines why science appears to be under attack, and why public trust in key scientific theories has been eroded – from the theory that man-made climate change is warming our planet, to the safety of GM food, or that HIV causes AIDS. He interviews scientists and campaigners from both sides of the climate change debate, and travels to New York to meet Tony, who has HIV but doesn't believe that the virus is responsible for AIDS.
}}{{Episode list		Title=The Secret World of Paindf=yes|2011|01|31}}ProdCode=11ShortSummary = Horizon reveals the latest research into one of the most mysterious and common human experiences: pain. Exploring the breakthroughs that have come from studying a remarkable woman in London who has felt no pain at all in her life, a man in the US who cut off his own arm to survive, and three generations of an Italian family who don't feel extremes of temperature. Featuring a new treatment that involves a pioneering computer game 'snow world' that contains the power to banish pain, and revealing how powerfully our moods and emotions shape how we feel pain.
}}{{Episode list		Title=Surviving a Car Crashdf=yes|2011|02|07}}ProdCode=12ShortSummary = Horizon meets the scientists working to make fatal car crashes a thing of the past. A remarkable fusion of mechanical engineering and biology promises to save countless lives across the world. The programme has exclusive access to the secretive world of the most advanced car crash tests. Horizon reveals how the latest advances in trauma medicine, psychology and even extreme sport are transforming your chances of surviving on the roads. And the programme shows how researchers are creating a new virtual crash test dummy that could change how our cars are designed forever.
}}{{Episode list		Title=How to Mend a Broken Heartdf=yes|2011|02|14}}ProdCode=13ShortSummary = Dr Kevin Fong finds out how close scientists are to being able to mend your heart if it stops working. He meets some of the people who have undergone pioneering heart operations and the scientists who are pushing the limits of cardiac treatment. We meet a man who has had his heart replaced with an artificial one powered by a mechanical pump he carries around in a rucksack, and witness a scientist bring a dead animal heart back to life on a workbench. Plus, the work of an American scientist who is using stem cells to turn what she calls a 'ghost heart' – the scaffold of a heart – into a replacement heart for humans.
}}{{Episode list		Title=Are We Still Evolving?df=yes|2011|03|01}}ProdCode=14ShortSummary = Dr Alice Roberts asks one of the great questions about our species: are we still evolving? There's no doubt that we're a product of millions of years of evolution. But thanks to modern technology and medicine, did we escape Darwin's law of the survival of the fittest? Alice follows a trail of clues from ancient human bones, to studies of remarkable people living in the most inhospitable parts of the planet, to the frontiers of genetic research to discover if we are still evolving – and where we might be heading.
}}{{Episode list		Title=Predators in Your Backyarddf=yes|2011|03|08}}ProdCode=15ShortSummary = Looking at the radical scheme of reintroducing predator animals close to human dwellings around the world, and the benefits following the reintroduction of Wolves back to Yellowstone National Park.
}}{{Episode list		Title=The End of the World? A Horizon Guide to Armageddondf=yes|2011|03|17}}ProdCode=—ShortSummary = Our understanding of the world around us is better now than ever before. But are we any closer to knowing how its all going to end? Dallas Campbell delves into the Horizon archive to discover how scientists have tried to predict an impending apocalypse – from natural disaster to killer disease to asteroid impact – and to ask: when Armageddon arrives, will science be able to save us?
}}{{Episode list		Title=Japan Earthquake: A Horizon Special with Iain Stewartdf=yes|2011|03|27}}ProdCode=—ShortSummary = A look at the powerful forces that created the devastating Japanese earthquake.
}}{{Episode list		Title=The Space Shuttle: A Horizon Guidedf=yes|2011|04|10}}ProdCode=—ShortSummary = Coverage from three decades of programmes to present a biography of the space shuttle programme, due to be decommissioned in 2011.
}}

Series 48: 2011–2012

TitleOriginal broadcast dateEpisode{{Episode listTitle=Do You See What I Seedf=yes|2011|08|08}}ProdCode=1ShortSummary = An exploration of the effect of colours on people's lives, and how perceptions of them can be influenced by age, gender and mood. The programme examines scientists' claims that different hues have hidden powers, from the winning properties of red to how blue seemingly makes time speed up.
}}{{Episode list		Title=Carrot or Stick: A Horizon Guide to Raising Kidsdf=yes|2011|08|11}}ProdCode=—ShortSummary = Child psychologist Laverne Antrobus uses excerpts from the Horizon archive to demonstrate how science has shaped parenting and education methods over the past 50 years. She considers which approach is best for raising children, explores how extreme behaviour can be explained by neurological problems, and finds out the effects of a child-centred environment on learning.
}}{{Episode list		Title=Seeing Starsdf=yes|2011|08|15}}ProdCode=2ShortSummary = Across the world, a new generation of astronomers is out to make fresh discoveries about the universe, but the scientists need to look farther than ever before. For this, they have pushed the limits of science and engineering to create a new set of super-telescopes that they hope will help them rewrite the story of the stars.
}}{{Episode list		Title=The Nine Months That Made Youdf=yes|2011|08|22}}ProdCode=3ShortSummary = An exploration of theories pioneered by British scientist Professor David Barker, who believes that the time people spend in the womb is so profoundly important that it could affect every area of their subsequent development, from health and personality to the lives of their children.
}}{{Episode list		Title=The Coredf=yes|2011|08|31}}ProdCode=4ShortSummary = For centuries we have dreamt of reaching the centre of the Earth. Now scientists are uncovering a bizarre and alien world that lies 4,000 miles beneath our feet, unlike anything we know on the surface. It is a planet buried within the planet we know, where storms rage within a sea of white-hot metal and a giant forest of crystals make up a metal core the size of the Moon. Horizon follows scientists who are conducting experiments to recreate this core within their own laboratories, with surprising results.
}}{{Episode list		Title=Are You Good or Evil?df=yes|2011|09|07}}ProdCode=5ShortSummary = Horizon meets the researchers who have studied some of the most terrifying people behind bars – psychopathic killers. But there was a shock in store for one of these scientists, Professor Jim Fallon, when he discovered that he had the profile of a psychopath. And the reason he didn't turn out to be a killer holds important lessons for all of us. We meet the scientist who believes he has found the moral molecule[89] and the man who is using this new understanding to rewrite our ideas of crime and punishment.[90]
}}{{Episode list		Title=Is Nuclear Power Safe?df=yes|2011|09|14}}ProdCode=6ShortSummary = Six months after the explosions at the Fukushima nuclear plant and the release of radiation there, Professor Jim Al-Khalili sets out to discover whether nuclear power is safe. He begins in Japan, where he meets some of the tens of thousands of people who have been evacuated from the exclusion zone. He travels to an abandoned village just outside the zone to witness a nuclear clean-up operation. Jim draws on the latest scientific findings from Japan and from the previous explosion at Chernobyl to understand how dangerous the release of radiation is likely to be and what that means for our trust in nuclear power.
}}{{Episode list		Title=Extinct: A Horizon Guide to Dinosaursdf=yes|2011|09|21}}ProdCode=—ShortSummary = Dallas Campbell explores how mankind's understanding of dinosaurs has developed since the 1970s. He reveals how technological advances led to scientists revising their theories about how the creatures might once have lived, as well as gaining new insights into the reasons for their extinction. The presenter also explores the genetic links between modern birds and the ancient lizards.
}}{{Episode list		Title=The Hunt for the Higgsdf=yes|2012|01|09}}ProdCode=—ShortSummary = Jim Al-Khalili follows the efforts of particle physicists at the CERN research laboratory near Geneva, Switzerland, to find the Higgs particle, which is believed to give mass to everything in the universe. He explains why scientists believe discovering it could help answer fundamental questions about the nature of existence, and reveals why their theories are based on the idea of symmetry.
}}{{Episode list		Title=Playing Goddf=yes|2012|01|17}}ProdCode=7ShortSummary = Adam Rutherford explores synthetic biology, a branch of science that researchers hope will enable them to break nature down into constituent parts so they can rebuild it as they please. He learns about the spider-goat, a creature bred by American scientists, whose milk can be used to artificially create the material for spiderwebs, and investigates how the science behind it could be applied to other areas of the natural world – including the human brain.
}}{{Episode list		Title=The Truth About Exercisedf=yes|2012|02|28}}ProdCode=8ShortSummary = Michael Mosley investigates recent scientific research that could change the way people exercise, including a study that suggests many could benefit from just three minutes of high-intensity activity a week. He also discovers the health benefits of seemingly innocuous actions, such as walking and fidgeting, and learns why some people do not respond to exercise at all.
}}{{Episode list		Title=Woof! A Horizon Guide to Dogsdf=yes|2012|03|01}}ProdCode=—ShortSummary = Dallas Campbell examines films from the Horizon archive to discover what science can teach people about dogs. He investigates the origins of domestic breeds and learns about the role humans played in shaping canine evolution, before asking why the bond between mankind and dogs is particularly strong – and whether it can be improved in the future.
}}{{Episode list		Title=Solar Storms: The Threat to Planet Earthdf=yes|2012|03|06}}ProdCode=9ShortSummary = Scientists predict this year will see a fit of violent activity on the sun which will propel billions of tonnes of superheated gas and pulses of energy towards Earth. In 1989 one of these solar storms, which has the power to close down modern technology, cut off the power to the Canadian province of Quebec. Horizon meets the weathermen as they try to predict what's coming and organisations like the National Grid as they prepare for the cosmic tempest.
}}{{Episode list		Title=Out of Control?df=yes|2012|03|13}}ProdCode=10ShortSummary = People assume they are in control of their lives, deciding what they want and when they want it – but scientists now claim this is simply an illusion. Experiments reveal that what a person does and what they think can be very different, with the unconscious mind often influencing the decisions they make, from what they eat to who they fall in love with. Horizon reveals to what extent people really do control their own destiny.
}}{{Episode list		Title=The Truth About Fatdf=yes|2012|03|20}}ProdCode=11ShortSummary = Surgeon Gabriel Weston explores why so many people are piling on the pounds – and learns about new ways to fight the flab. She discovers the hidden hormones that control appetite and sees the latest surgery that fundamentally changes what a patient wants to eat – by altering how their brains work.
}}{{Episode list		Title=Global Weirdingdf=yes|2012|03|27}}ProdCode=12ShortSummary = Something weird seems to be happening to our weather – it appears to be getting more extreme. In the past few years we have shivered through two record-breaking cold winters and parts of the country have experienced intense droughts and torrential floods. It is a pattern that appears to be playing out across the globe. Hurricane chasers are recording bigger storms and in Texas, record-breaking rain has been followed by record-breaking drought. Horizon follows the scientists who are trying to understand what's been happening to our weather and investigates if these extremes are a taste of what's to come.
}}{{Episode list		Title=The Hunt for AIdf=yes|2012|04|03}}ProdCode=13ShortSummary = Marcus Du Sautoy wants to find out how close we are to creating machines that can think like us: robots or computers that have artificial intelligence. His journey takes him to a strange and bizarre world where AI is now taking shape. Marcus meets two robots who are developing their own private language, and attempts to communicate to them. He discovers how a super computer beat humans at one of the toughest quiz shows on the planet, Jeopardy!, and finds out if machines can have creativity and intuition like us. Marcus is worried that if machines can think like us, then he will be out of business. But his conclusion is that AI machines may surprise us with their own distinct way of thinking.
}}{{Episode list		Title=Defeating Cancerdf=yes|2012|04|10}}ProdCode=14ShortSummary = Over the past year, Horizon has been behind the scenes at one of Britain's leading cancer hospitals, the Royal Marsden in London. The film follows Rosemary, Phil and Ray as they undergo remarkable new treatments – from a billion pound genetically targeted drug designed to fight a type of skin cancer, to advanced robotic surgery. We witness the breakthroughs in surgery and in scientific research that are offering new hope and helping to defeat a disease that more than one in three of us will develop at some stage of our lives.
}}{{Episode list		Title=Stuff: A Horizon Guide to Materialsdf=yes|2012|04|19}}ProdCode=—ShortSummary = Engineer and broadcaster Jem Stansfield explores the Horizon archives to discover how the programme has covered developments in material science during the past five decades. He learns how scientists have created new materials and found fresh uses for old ones, and explores how advances including superconductors and silicon chips have changed mankind's understanding of the world.
}}

Series 49: 2012–2013

TitleOriginal broadcast dateEpisode {{Episode listTitle=The Transit of Venus: A Horizon Specialdf=yes|2012|06|05}}ProdCode=—ShortSummary = Liz Bonnin explores the transit of Venus, an event which takes place just after 11pm tonight and offers a rare opportunity to see the planet passing across the face of the sun. She explains why the orbits of Venus and Earth mean they are only aligned twice every century, and investigates what studies of Venus have revealed about life on Earth. Solar physicist Lucie Green investigates James Cook's 1769 voyage to Tahiti to observe the transit, and oceanographer Helen Czerski explores how Earth and Venus came to be so different.
}}{{Episode list		Title=Blink: A Horizon Guide to the Sensesdf=yes|2012|07|11}}ProdCode=—ShortSummary = Kevin Fong looks back through 40 years of Horizon archives to explore what science has revealed about methods of perception. He discovers why babies use touch more than any other sense, how vision can easily be tricked, and the ways technological advancements are getting closer to being able to replace human faculties if they fail.
}}{{Episode list		Title=Immortal? A Horizon Guide to Ageingdf=yes|2012|07|17}}ProdCode=—ShortSummary = Veteran presenter Johnny Ball looks back over the 45 years that both he and TV series Horizon have been appearing on air to find out what scientists have learnt about how and why people grow old. He charts developments from macabre early claims of rejuvenation to the latest breakthroughs, and asks if the dream of immortality is any closer to coming true.
}}{{Episode list		Title=The Truth About Looking Youngdf=yes|2012|07|23}}ProdCode=1ShortSummary = Plastic surgeon Dr Rozina Ali leaves the operating theatre behind for the frontiers of skin science and asks if it is possible to make your skin look younger without surgery. She examines why some people appear to age better than others, and explores scientific innovations including a pill that manufacturers claim has rejuvenating properties. She also discovers how the contents of a squid's eye could change people's experiences of summer.
}}{{Episode list		Title=Mission to Marsdf=yes|2012|07|30}}ProdCode=2ShortSummary = Behind the scenes of Curiosity, NASA's latest mission to investigate the possibility of life on Mars. The agency aims to land a nuclear-powered rover vehicle, which cost $2.5billion to develop, on the surface of the planet by winching it down from a rocket-powered crane, then use it to explore the terrain. The programme also discovers the lessons experts have learned from previous expeditions, many of which ended in failure, and the project's chief scientist John Grotzinger discusses what he hopes the mission will reveal.
}}{{Episode list		Title=Eat, Fast and Live Longerdf=yes|2012|08|06}}ProdCode=3ShortSummary = Michael J. Mosley has set himself a truly ambitious goal: he wants to live longer, stay younger and lose weight in the bargain. And he wants to make as few changes to his life as possible along the way. He discovers the powerful new science behind the ancient idea of fasting, and he thinks he's found a way of doing it with the 2 diet that still allows him to enjoy his food. Michael tests out the science of fasting on himself – with life-changing results.
}}{{Episode list		Title=How Big Is the Universe?df=yes|2012|08|27}}ProdCode=4ShortSummary = Cosmologists discuss their project to create a map of everything in existence, and reveal that their research has yielded some highly unexpected results, creating a picture stranger than anything they had imagined. Scientists also explain why the map suggests the universe may not be an all-encompassing entity – but merely the starting point for something much bigger.
}}{{Episode list		Title=How Small Is the Universe?df=yes|2012|09|03}}ProdCode=5ShortSummary = Horizon plunges down the biggest rabbit-hole in history in search of the smallest thing in the Universe. It is a journey where things do not just become smaller but also a whole lot weirder. Scientists hope to catch a glimpse of miniature black holes, multiple dimensions and even parallel Universes. As they start to explore this wonderland, where nothing is quite what it seems, they may have to rewrite the fundamental laws of time and space.
}}{{Episode list		Title=Defeating the Superbugsdf=yes|2012|09|10}}ProdCode=6ShortSummary = Scientists and researchers discuss their efforts to thwart potentially lethal strains of bacteria that have grown resistant to conventional antibiotics. The programme follows projects designed to track the global spread of the organisms, and reveals new techniques that are being developed to protect and treat patients.
}}{{Episode list		Title=The Final Frontier? A Horizon Guide to the Universedf=yes|2012|10|17}}ProdCode=—ShortSummary = Dallas Campbell charts scientific breakthroughs that have transformed how the universe is understood, using footage from the Horizon archives which stretch back almost 50 years. He explores subjects including Einstein's concept of spacetime, alien planets and extra dimensions, and discovers each advance reveals new mysteries to be investigated.
}}{{Episode list		Title=The Truth About Meteors: A Horizon Specialdf=yes|2013|03|03}}ProdCode=7 ShortSummary = On 2013 February 15, a meteorite travelling at more than 30,000 miles an hour crashed into Russia's Ural mountains, injuring more than 1,000 people. Just a day later, an asteroid passed within 17,000 miles of Earth. These were reminders that the planet's journey through space is fraught with danger. Professor Iain Stewart explores what meteorites and asteroids are, where they come from, the risks they pose and the role they have played in Earth's history.
}}{{Episode list		Title=The Creative Brain – How Insight Worksdf=yes|2013|03|14}}ProdCode=8ShortSummary = The work of scientists who are adopting unusual techniques to try to determine how flashes of inspiration come about, developing a series of puzzles and brainteasers to spark creative behaviour. The latest neuro-imaging technology means researchers can witness the birth of an idea as it happens and what they are learning has the power to make everyone more creative.
}}{{Episode list		Title=How to Avoid Mistakes in Surgerydf=yes|2013|03|21}}ProdCode=9ShortSummary = Dr Kevin Fong examines what can be done to reduce the number of mistakes being made by surgeons in the operating theatre. Speaking to professionals in high-pressure careers - including airline pilots, firemen and Formula One pit workers - he explores the coping mechanisms they each employ when faced with emergency situations, and looks at how these tactics could be transferred to the world of surgery.
}}{{Episode list		Title=Mend Me: A Horizon Guide to Transplantsdf=yes|2013|03|27}}ProdCode=—ShortSummary = The extraordinary odds doctors and patients have had to overcome to achieve amazing breakthroughs in transplant surgery, including full face transplants and growing organs in the laboratory. Michael Mosley identifies some of the key turning points and explores how far science can go in a bid to prolong life.
}}{{Episode list		Title=The Truth about Tastedf=yes|2013|03|28}}ProdCode=10ShortSummary = In recent years, researchers have started to understand why people love the foods they do, and that there may be a way to make snacks taste sweeter without adding any extra sugar – and it's all down to a trick that happens in the brain. This film meets a scientist who has grown a tomato that is sweeter and juicier than anything likely to be found on a supermarket shelf, and follows those hoping to become elite, professional tasters.
}}{{Episode list		Title=The Age of Big Datadf=yes|2013|04|04}}ProdCode=11ShortSummary = An examination of the varying uses being made of the huge amount of information now available in databases ie predictive analytics. In Los Angeles, police officers are taking part in an experiment to predict crime before it even happens, one City of London trader believes he has found the secret of making billions with mathematics, and astronomers in South Africa are attempting to catalogue the entire universe.
}}{{Episode list		Title=Tomorrow's World: A Horizon Specialdf=yes|2013|04|11}}ProdCode=—ShortSummary = Liz Bonnin delves into the world of inventors and innovations, revealing the people and technologies set to transform life in the 21st century. She meets some of the world's foremost visionaries, mavericks and dreamers, from the entrepreneurs who are the driving force behind a new space race to Andre Geim, a Nobel Prize-winning physicist leading a nanotech revolution.
}}{{Episode list		Title=The Secret Life of the Catdf=yes|2013|06|13}}ProdCode=12ShortSummary = Horizon discovers what your cat really does get up to beyond the cat flap. In this groundbreaking experiment, fifty cats in a Surrey village are tagged with GPS collars and their every movement is recorded, day and night, as they hunt in our backyards and patrol the garden fences and hedgerows. Cats are also fitted with specially developed cat-cams, revealing their unique view of the world.
}}{{Episode list		Title=Little Cat Diariesdf=yes|2013|06|14}}ProdCode=13ShortSummary = In the previous episode "The Secret Life of the Cat", 50 domestic felines from a Surrey village were fitted with GPS collars and cameras to track their every movement and record their unique view of the world. The results reveal a tomcat that seems to have no owner, a hunter that prefers food it can catch and kill to anything it might be given by humans, and a cat that has abandoned its home in favour of another set of owners.
}}{{Episode list		Title=Fracking: The New Energy Rushdf=yes|2013|06|19}}ProdCode=14ShortSummary = Geologist Iain Stewart investigates a new and controversial method of extracting natural gas from deep underground that involves hydraulic fracturing - or Fracking, as it is known. He travels to America to find out what the process is and what can be learned from the US experience, meeting people who have become rich from it, as well as those bothered about any risks to their communities.
}}{{Episode list		Title=Swallowed by a Black Holedf=yes|2013|06|26}}ProdCode=15ShortSummary = A gas cloud has strayed within the gravitational reach of a super-massive black hole in the centre of the Milky Way and is expected to be affected by it at some point this summer. Across the globe, telescopes are being trained on the heart of Earth's galaxy in the expectation of observing this cosmic spectacle for the first time in history.
}}{{Episode list		Title=What Makes Us Human?df=yes|2013|07|03}}ProdCode=16ShortSummary = Humans share 99% of their DNA with chimpanzees and yet from the moment of birth, their lives are completely different. Anthropologist Alice Roberts investigates the factors that separate mankind from its closest living relatives, exploring differences in physiology, genetic make-up and in the brain.
}}{{Episode list		Title=The Truth About Personalitydf=yes|2013|07|10}}ProdCode=17ShortSummary = Michael Mosley explores the latest research in genetics and neuroscience to find out what factors shape people's personalities and whether they can be changed. Michael tries two techniques in an attempt to make him worry less and become more of an optimist - with surprising results. The episode features Professor Elaine Fox of University of Essex.[92][93]}

Series 50: 2013–2014

TitleOriginal broadcast dateEpisode{{Episode listTitle=What's Killing Our Bees? A Horizon Specialdf=yes|2013|08|02}}ProdCode=1ShortSummary = Bees are worth £430 million to Britain's agriculture sector and a third of UK food is reliant on pollination, but their numbers have been falling dramatically. In this film, journalist and beekeeper Bill Turnbull examines the array of conflicting evidence in a bid to determine what is responsible for the decline and meets scientists who are fitting radar transponders to the insects to establish why numbers are falling.
}}{{Episode list		Title=Monitor Medf=yes|2013|08|12}}ProdCode=2ShortSummary = Dr Kevin Fong explores the boom in "apps" and gadgets designed to help people monitor their health around the clock. He meets some of the pioneers of this revolution and visits a man who self-diagnosed a life-threatening disease from his own data, without going to the doctor.
}}{{Episode list		Title=Defeating the Hackersdf=yes|2013|08|19}}ProdCode=3ShortSummary = The programme explores the murky and fast-paced world of people using computers to steal money and identities, as well as wreaking havoc with users online lives. The film reveals the methods scientists are using to help defeat the hackers, meets the two men who uncovered the world's first cyber weapon, and the computer expert who worked out how to hack into cash machines.
}}{{Episode list		Title=Dinosaurs: The Hunt for Lifedf=yes|2013|08|26}}ProdCode=4ShortSummary = The research of Dr Mary Schweitzer, who found soft tissue and red blood cells in the fossilised bones of a 68-million-year-old T rex, a breakthrough that wouldn't have looked out of place in Jurassic Park. Her work is revolutionising scientific understanding of dinosaurs and the palaeontologist believes she may also have found traces of the creatures' DNA.
}}{{Episode list		Title=Sex: A Horizon Guidedf=yes|2013|09|11}}ProdCode=—ShortSummary = Professor Alice Roberts investigates how science came to understand sex - a simple word for a very complex set of desires, including individual passions, wants and emotions. She looks at how the world of science has striven to solve people's sexual problems, and searched for ways of improving performance.
}}{{Episode list		Title=Impact! A Horizon Guide to Plane Crashesdf=yes|2013|10|14}}ProdCode=—ShortSummary = It's a macabre paradox, but almost every advance in aviation safety has been driven by a crash. After every crash, investigators determine its cause and scientists make every effort to ensure the same mistakes never happen again. Dallas Campbell delves into the Horizon archives to chart the deadly disasters that have helped make air travel today the safest it has ever been.
}}{{Episode list		Title=Impact! A Horizon Guide to Car Crashesdf=yes|2013|10|21}}ProdCode=—ShortSummary = In the 1950s up to 8,000 people died every year on the roads in this country - a truly horrific figure. Thankfully it has now fallen to around 2,000 a year - still a terrible toll, but a vast improvement, particularly given the increase in cars on the road.
}}{{Episode list		Title=Comet of the Century: A Horizon Specialdf=yes|2013|11|23}}ProdCode=—ShortSummary = Comet Ison is due to make its closest approach to the sun on 28 November and will be visible in both the evening and morning skies during December if it survives its brush with the star. The programme examines how Ison's tail of vaporised gas and water could give insights into some of the greatest mysteries of science, including the origin of the solar system and whether Earth's water came from similar celestial objects.
}}{{Episode list		Title=Sugar v Fatdf=yes|2014|01|29}}ProdCode=5ShortSummary = Doctors Chris and Xand van Tulleken, who are identical twins, go on month-long diets comprising high volumes of fat or sugar to find out which is worse for the human body. The effects on their health are both shocking and surprising, but they also discover their biggest enemy may have been hiding in plain sight.
}}{{Episode list		Title=Swallowed by a Sink Holedf=yes|2014|02|03}}ProdCode=6ShortSummary = In February last year, Jeff Bush was asleep at his home in Florida when a sinkhole opened up beneath his bedroom. Despite the efforts of his brother to rescue him, Jeff was never seen alive again and his body could not be recovered. Professor Iain Stewart travels to the American state to discover what took Jeff's life and investigate why the geology of the area makes it the sinkhole capital of the world.
}}{{Episode list		Title=Man on Mars: Mission to the Red Planetdf=yes|2014|02|10}}ProdCode=7ShortSummary = Horizon goes behind the scenes at NASA to discover how it is preparing for its most ambitious and daring mission: to land humans on the surface of Mars. Horizon meets the scientists and engineers who are designing new rockets, new space suits and finding ways to help astronauts survive the perils of this long voyage.
}}{{Episode list		Title=The Power of the Placebodf=yes|2014|02|17}}ProdCode=8ShortSummary = They are the miracle pills that shouldn't really work at all. Placebos come in all shapes and sizes, but they contain no active ingredient. Now they are being shown to help treat pain, depression and even alleviate some of the symptoms of Parkinson's disease. Horizon explores why they work, and how we could all benefit from the hidden power of the placebo.
}}{{Episode list		Title=How You Really Make Decisionsdf=yes|2014|02|26}}ProdCode=9ShortSummary = Every day you make thousands of decisions, big and small, and behind all them is a powerful battle in your mind, pitting Intuition against logic. This conflict affects every aspect of your life - from what you eat to what you believe, and especially to how you spend your money. And it turns out that the intuitive part of your mind is a lot more powerful than you may realise.[94] Contributors include Chris Chabris, Daniel Simons, Paul Dolan, Nobel Prize winner Daniel Kahneman, Amos Tversky, Donald R. Kretz, Laurie Santos, Hersh Shefrin and Dan Ariely.[95][96]
}}{{Episode list		Title=Living with Autismdf=yes|2014|04|01}}ProdCode=10ShortSummary = On the eve of National / World Autism Day, this programme reveals how a lifetime of study by developmental psychologist Uta Frith has transformed understanding of the condition. The professor discusses the ways people with autism perceive and interact with the world, reveals how another kind of reality exists for them and explains why they often fail to understand jokes.
}}{{Episode list		Title=The £10 Million Challengedf=yes|2014|05|22}}ProdCode=—ShortSummary = To celebrate its 50th birthday, Horizon invites the public to play a role in tackling the greatest challenges facing science today.
}}{{Episode list		Title=Where is Flight MH370?df=yes|2014|06|17}}ProdCode=11ShortSummary = Horizon tells the inside story of the search for Malaysia Airlines flight MH370. With access to the key players on the frontline in the southern Indian Ocean and the British satellite engineers who tracked the plane's final hours, Horizon breaks open the biggest mystery in aviation history.
}}{{Episode list		Title=What's Wrong with Our Weather?df=yes|2014|07|17}}ProdCode=12ShortSummary = Physicist Helen Czerski and meteorologist John Hammond investigate why the British weather appears to have become more extreme and if it has anything to do with climate change. They examine the effect of the jet stream's strange behaviour, revealing what is causing it, and attempt to find out if severe winters are going to become more common.
}}

Series 51: 2014–2015

TitleOriginal broadcast dateEpisode{{Episode listTitle=Should I Eat Meat? The Big Health Dilemmadf=yes|2014|08|18}}ProdCode=1ShortSummary = In the first of two programmes this week investigating the truth about meat, Michael Mosley asks if those summer barbecue favourites - burgers and sausages - are as bad as some people think. He puts the latest scientific findings to the test on a high-meat diet to discover whether eating beef and bacon every day will do him any harm.
}}{{Episode list		Title=Should I Eat Meat? How to Feed the Planetdf=yes|2014|08|20}}ProdCode=2ShortSummary = Part two of two. Every year roughly 65 billion animals are slaughtered globally for food - nine for every living person. In this documentary, Michael Mosley examines the effect this is having on the planet and finds out what meat we should be buying if we want to be eco-friendly carnivores. Is it better to purchase free-range organic or factory-farmed options? The answers are far from obvious.
}}{{Episode list		Title=Allergies: Modern Life and Medf=yes|2014|08|27}}ProdCode=3ShortSummary = Changes to the bacteria that live inside all of us are responsible for increasing the number of people with allergies, suggests new research. In this episode of Horizon, the show investigates this claim by conducting a unique experiment with two allergic families in order to find out just what it is in the modern world that is to blame. With a raft of mini cameras, GPS units and the very latest gene sequencing technology, the show discovers how the western lifestyle is affecting their bacteria. Why are these changes making people allergic? And what can be done to put a stop to the allergy epidemic?
}}{{Episode list		Title=Inside the Dark Webdf=yes|2014|09|03}}ProdCode=4ShortSummary = Twenty-five years after the World Wide Web was created, the issue of computer surveillance has become the greatest shame upon its existence. With many concerned that governments and corporations monitor people's every move, this programme meets hackers and scientists who are using technology to fight back, and some law enforcement officers who believe it's leading to opportunities for risk-free crimes. With contributors including World Wide Web inventor Tim Berners-Lee and WikiLeaks co-founder Julian Assange.
}}{{Episode list		Title=Ebola: The Search for a Curedf=yes|2014|09|10}}ProdCode=6ShortSummary = As the West Africa Ebola outbreak continues to claim lives, this special edition meets scientists and doctors from around the world who are looking for a cure to the deadly virus, and hears first-hand accounts of what it is like to catch - and survive - the disease.
}}{{Episode list		Title=Is Your Brain Male or Female?df=yes|2014|09|29}}ProdCode=7ShortSummary=New research suggests the connections in men's and women's brains follow different patterns, which might explain typical forms of gender-specific behaviour. Dr Michael Mosley and Professor Alice Roberts investigate whether these are innate or are shaped by the outside world, using a team of human guinea pigs and a troop of Barbary monkeys to test the science and challenge old stereotypes. They ask whether this new scientific research will benefit both sexes or drive them even further apart.
}}{{Episode list		Title=Cat Watch 2014: The New Horizon Experiment: A Cat's Eye Viewdf=yes|2014|10|07}}ProdCode=—ShortSummary = Millions of people have cats in their homes, yet they know very little about them. Are they playful pets, fearsome fighters or deadly hunters? In this three-part programme, Liz Bonnin joins forces with some of the world's leading feline experts to conduct a groundbreaking scientific study using GPS trackers and mini-cameras to follow 100 cats in three very different environments to find out what they get up to when they leave the house. The first edition examines how cats see, hear and smell the world with the senses developed by their wild ancestors, and looks at why this could be making life difficult for them in the modern world.
}}{{Episode list		Title=Cat Watch 2014: The New Horizon Experiment: The Lion in Your Lapdf=yes|2014|10|08}}ProdCode=—ShortSummary = The second programme of the three-part scientific study reveals the wild side of domestic cats, with GPS trackers and mini-cameras showing how they transform from pet to predator as soon as they leave the house. Liz Bonnin and the team of experts put Ozzy and Smudge under surveillance to find out who's king of the street, and explain why cats' hunting instincts cannot be kept under control.
}}{{Episode list		Title=Cat Watch 2014: The New Horizon Experiment: Cat Talkdf=yes|2014|10|09}}ProdCode=—ShortSummary = In the final episode of this three-part scientific study, Liz Bonnin and the team examine the secret language of cats, revealing the surprising conversations they have when their owners are asleep, and investigating why they meow to humans but not one another. They rig a house with cameras and trackers to discover if four cats residing under one roof can all get on and find out why living alongside people is making things difficult for 21st-century felines.
}}{{Episode list		Title=What's the Right Diet for You? A Horizon Special: Episode 1df=yes|2015|01|12}}ProdCode=—ShortSummary = The first of a three-part special in which Dr Chris van Tulleken, clinical psychologist Tanya Byron and nutrition and weight-loss scientists from Oxford and Cambridge universities put one of the latest theories on diets to the test. They have selected 75 overweight people from across the UK, who will be put on personalised regimens to explore overeating related to genes, gut hormones and emotions. The opening programme follows the volunteers as they undergo an intensive five-day analysis at a residential diet lab at Liverpool Hope University, before they are then put on the diets the experts believe are best-suited to them.
}}{{Episode list		Title=What's the Right Diet for You? A Horizon Special: Episode 2df=yes|2015|01|13}}ProdCode=—ShortSummary =In the second of three programmes, the volunteers leave the lab and take their diets home, where they face the challenge of sticking to their weight-loss plans while dealing with all the stresses and temptations of their real lives. Geneticist Giles Yeo uses eye-tracking technology to investigate how the Constant Cravers are affected by their 'hungry genes', while Tanya Byron visits Cambridge University to discover what happens in the brains of Emotional Eaters to compel them to comfort eat. The Feasters are brought together for a test by Fiona Gribble, who wants to find out why soup is such a great dieting tool.
}}{{Episode list		Title=What's the Right Diet for You? A Horizon Special: Episode 3df=yes|2015|01|14}}ProdCode=—ShortSummary = This programme looks into how physiological processes in the body and the brain can make the final weeks and months of a diet difficult. Fiona Gribble runs an experiment to show that the rate at which the Feasters eat their food affects how full they feel, Giles Yeo demonstrates how eating breakfast can help the Constant Cravers, and Paul Aveyard demonstrates ways that will help the Emotional Eaters learn how to deal with occasional indulgences and avoid further relapse. Lastly, the final results of the study are announced, revealing how successful the diet personalisation approach has been for the group and how many of the volunteers made their five per cent weight-loss target.
}}{{Episode list		Title=Secrets of the Solar Systemdf=yes|2015|03|03}}ProdCode=8ShortSummary=Planets are now being discovered outside Earth's solar system on a regular basis, and these strange new worlds are forcing scientists to rewrite the history of how the Sun and the planets, satellites, dwarf planets, asteroids and comets that orbit it came into being. This programme reveals that far from a simple story of stable objects orbiting a star, the development of the solar system was a potent combination of hellfire, chaos and planetary pinball that makes it somewhat of a miracle that Earth was created at all.
}}{{Episode list		Title=Climate Change: A Horizon Guidedf=yes|2015|03|04}}ProdCode=—ShortSummary = Dr Helen Czerski explores climate change, charting the transformation of a little-known theory into one of the greatest scientific undertakings in history. It has been a surprising journey of discovery that has revolutionised humankind's understanding of the global climate, and seen scientists face unprecedented controversy and criticism.
}}{{Episode list		Title=The Mystery of Murder: A Horizon Guidedf=yes|2015|03|09}}ProdCode=—ShortSummary = Michael Mosley uses footage from the BBC archives to chart scientists' progress as they looked at the mind of a murderer in an attempt to understand why people commit such crimes, asking whether they are driven to it by circumstances or are simply born to kill.
}}{{Episode list		Title=Aftershock: The Hunt for Gravitational Wavesdf=yes|2015|03|10}}ProdCode=9ShortSummary=In March 2014, a team at a research station at the South Pole claimed to have found evidence of gravitational waves - or ripples in space-time - from the earliest moments of the universe. The discovery sent shockwaves through the world of theoretical physics, with those involved tipped to pick up Nobel Prizes, while for others it meant their ideas were in shreds. This programme tell the inside story of the scientific quest and what happened when things began to unravel.
}}{{Episode list		Title=Dancing in the Dark: The End of Physics?df=yes|2015|03|17}}ProdCode=10ShortSummary=The Large Hadron Collider at CERN has been upgraded. When it's switched on in March 2015, its collisions will have twice the energy they did before. The hope is that scientists will discover the identity of dark matter in the debris. The stakes are high - because if dark matter fails to show itself, it might mean that physics itself needs a rethink.
}}{{Episode list		Title=70 Million Animal Mummies: Egypt's Dark Secretdf=yes|2015|05|11}}ProdCode=11ShortSummary=Modern technology is used to scan Egyptian animal mummies from museums across the world. By creating 3D images of their content, experts are able to discover the truth about the strange role the creatures played in the ancient civilisation's beliefs, and why so many of them were buried.
}}{{Episode list		Title=Is Binge Drinking Really That Bad?df=yes|2015|05|20}}ProdCode=12ShortSummary=Doctors and identical twins Chris and Xand van Tulleken investigate the effects that different drinking patterns have on health. Chris has his recommended 21 units of alcohol spread evenly across the week, while Xand uses up his allowance in single binges. How will their bodies differ after a month?
}}{{Episode list		Title=The Trouble with Space Junkdf=yes|2015|08|05}}ProdCode=13ShortSummary=Documentary revealing the scale of the problem of debris in space, with Earth surrounded by hundreds of millions of items moving at 17,000 miles per hour. The International Space Station had to move three times in 2014 to avoid potentially lethal chunks of junk and the Horizon team reveals how the US government is investing $1 billion to track space debris, while companies around the world are developing ways to clear up the mess, from nets and robot arms to harpoons.
}}{{Episode list		Title=Are Health Tests Really a Good Idea?df=yes|2015|08|12}}ProdCode=14ShortSummary=Michael Mosley presents a Horizon special exploring the effectiveness of a series of health tests available to people who otherwise feel perfectly well. From an expensive heart scan to a new national screening procedure to detect the earliest signs of bowel cancer, the check-ups are designed to catch various serious conditions before they develop further, and Michael puts himself through a series of assessments to determine whether any of them are worth doing.
}}{{Episode list		Title=First Britonsdf=yes|2015|08|19}}ProdCode=15ShortSummary=Documentary exploring how recent archaeological discoveries have shed new light on culture, origins and capabilities of the very first native Britons. For centuries, it has been assumed Britain's first peoples lived a brutal, hand-to-mouth existence as hunter-gatherers, but fresh evidence has emerged that has forced scientists and anthropologists to reassess their impressions of who these people were. The result is a very different portrait, illustrating a hardy and sophisticated culture that withstood centuries of extreme climate change, including a devastating tsunami. Narrator Adrian Lester describes how these early Britons endured the primal forces and became the first people to populate the island nation that would eventually become known as Britain. Includes contributions by a variety of experts, including Dr Hans Peeters, Dr Jim Innes, Professor Vince Gaffney, Dr David Jacques and Professor Martin Bell.
}}{{Episode list		Title=OCD: A Monster in My Minddf=yes|2015|08|26}}ProdCode=16ShortSummary=Developmental psychologist Uta Frith, a professor of neuroscience at University College London, sets out to dispel misconceptions about Obsessive Compulsive Disorder, which some regard as simply being overly fussy about tidiness, but which is often a much more serious, and potentially crippling brain disorder. She introduces Sophie, who must constantly check she hasn't killed people wherever she goes, and Richard, who is terrified of coming into contact with bins. Also featured is the story of Nanda, who is undergoing pioneering brain surgery to stop her worrying about 'components' on her body. Having explored the effect OCD can have on people's lives, Uta investigates therapy available to those struggling with the condition, and outlines whether neuroscience can offer anything by way of a cure.
}}{{Episode list		Title=Which Universe Are We In?df=yes|2015|09|02}}ProdCode=17ShortSummary=Documentary exploring the "multiverse", a theoretical approach to some of the fundamental questions of existence, which posits that an infinite number of universes exists. Each of these separate universes is defined by the way they differ from the others, in a concept seized upon by science-fiction writers to depict worlds where dinosaurs still live and the Germans won the Second World War, among other fantastical variations. The programme reveals that, until relatively recently, the "multi-verse" theory was dismissed as a fantasy, but now this unusual idea has found its way to the forefront of scientific thinking, and for a growing number of scientists, has become fundamental to understanding the nature of reality.
}}{{Episode list		Title=Cosmic Dawn: The Real Moment of Creationdf=yes|2015|09|09}}ProdCode=18ShortSummary=The scientific story behind the moment the first stars appeared in the universe, known as the Cosmic Dawn, which transformed the dark world originally created by the Big Bang. Astronomers now have the tools to explore this dramatic event that created the first ingredients of life as we know it, when the first stars were born to light up the universe. With contributions by Professor Tom Abel, Charmaine Green and Margaret Whitehurst.
}}{{Episode list		Title=Are Video Games Really That Bad?df=yes|2015|09|16}}ProdCode=19ShortSummary=The video game industry is a global phenomenon. There are over 1.2 billion gamers across the planet, with sales projected soon to pass $100 billion per year. But their very popularity fuels the controversy that surrounds them. They frequently stand accused of corrupting the young - of causing violence and addiction. But is this true?

Horizon reveals a scientific community deeply divided. Some are convinced that video games incite aggression. Others insist they have no effect whatsoever on real-world violence. But away from the controversy, there is a growing body of evidence that suggests video games may help keep the brain sharp, and could soon revolutionise how we combat mental decline as we age.


}}{{Episode list		Title=Tim Peake Special: How to Be an Astronautdf=yes|2015|12|13}}ProdCode=—ShortSummary = A video diary filmed over two years by Tim Peake, who on 15 December will become the first British astronaut to board the International Space Station. His personal footage details some of the risks and pressures he faces, as well as the rigorous training required to go into space, including replicating spacewalks and training to deal with the physical dangers of weightlessness, undergoing exercises in the Soyuz capsule and space station mockups, and preparing to spend time away from his wife and two sons.
}}

Series 52: 2016

TitleOriginal broadcast dateEpisode{{Episode listTitle=The Immortalistdf=yes|2016|03|16}}ProdCode=1ShortSummary = Investigating the story of how a Russian internet millionaire, Dmitry Itskov, is turning to cutting edge science to try to unlock the secret of living forever. The programme investigates the real science inspiring his bold plan to upload the human mind to a computer, and examines whether his goal of bringing about immortality for humans within thirty years is attainable.
}}{{Episode list		Title=Project Greenglow: The Quest for Gravity Controldf=yes|2016|03|23}}ProdCode=2ShortSummary = Documentary exploring attempts to control gravity, including investigation carried out by Project Greenglow in the mid-1990s by UK defence manufacturer BAE Systems (based on the work of Eugene Podkletnov[97]).
}}{{Episode list		Title=The Mystery of Dark Energydf=yes|2016|03|30}}ProdCode=3ShortSummary = Examining Dark Energy, the mysterious force that is unexpectedly causing the universe's expansion to speed up. Its effects were discovered in 1998, but physicists still do not know what it is, and its very existence calls into question Albert Einstein's General Theory of Relativity; the cornerstone of modern physics. The hunt for the identity of Dark Energy is on, and although experiments conducted on Earth and in space generate data that might provide a clue, physics is hoping another Einstein might emerge and write a new theory that explains the mystery.
}}{{Episode list		Title=Oceans of the Solar Systemdf=yes|2016|04|6}}ProdCode=4ShortSummary = Although oceans define the Earth and are crucial to life, recent discoveries have revealed that they are not unique to Earth. Oceans have been located across the solar system, and scientists are now embarking on a journey in search of new life in places that never seemed possible. With NASA planning to dive to the depths of a strange, distant ocean in a remarkable submarine, the programme discovers that the hunt for oceans in space is marking the dawn of a new era in the search for alien life.
}}{{Episode list		Title=The End of the Solar Systemdf=yes|2016|04|13}}ProdCode=5ShortSummary = The story of how the solar system will be transformed by the ageing sun, before coming to an end in approximately eight billion years. Astronomers can predict how it will happen by analysing distant galaxies, stars and planets in their final moments, and the programme brings these predictions to life with a giant scale model of the solar system spread out all over a Midwestern town, Peoria, Illinois. One prediction is of the Andromeda–Milky Way collision and merger, expected in about 4 billion years. Derek Jacobi narrates.[98]
}}{{Episode list		Title=Should We Close Our Zoos?df=yes|2016|04|17}}ProdCode=6ShortSummary = Liz Bonnin reports on issues concerning zoos, and questions whether they still have a place in the modern age. She visits the zoo in Copenhagen that created controversy by killing a giraffe and feeding it to lions, to investigate the practice of culling animals to manage population size. She also discovers how zoos are useful in preserving endangered species, including pandas and rhinos.
}}{{Episode list		Title=How to Find Love Onlinedf=yes|2016|04|25}}ProdCode=7ShortSummary = Mathematician Hannah Fry uses doctor and broadcaster Xand van Tulleken as a guinea pig to test whether the algorithms that dating sites use to match people actually work. Xand gets advice from scientists on what to write in his profile, has an MRI scan to find out whether his brain is equipped for love and goes on various dates to test whether the algorithm makes better matches than him choosing randomly.
}}{{Episode list		Title=Ice Station Antarcticadf=yes|2016|05|04}}ProdCode=8ShortSummary = BBC weatherman Peter Gibbs makes an emotional return to the British Antarctic Survey's Halley Research Station, where he lived and worked in the early 1980s. During that period, the station was key to the discovery of the ozone hole, and today it is making vital findings about how people's lives are vulnerable to the Sun's activities, as well as studying interplanetary travel and the threat of man-made climate change. In addition to returning to the place he once called home, Peter is on a rescue mission, since the station is under threat of being cast adrift on a huge iceberg.
}}{{Episode list		Title=Curing Alzheimer'sdf=yes|2016|05|11}}ProdCode= 9ShortSummary = Documentary investigating scientific breakthroughs in research on Alzheimer's disease, which are bringing hope to millions of sufferers across the world. New scanning and gene technology is allowing scientists to identify the disease at its earliest stages, often 15 years before symptoms appear and brain cells are destroyed, with drug trials in Colombia, USA and Europe showing startling success. The programme also reveals the changes in lifestyle that can prevent the development of the disease, as well as the effects of a UK-wide trial.{{see also|Alzheimer's disease biomarkers|Early-onset Alzheimer's disease|}}
}}{{Episode list		Title=E-Cigarettes: Miracle or Menace?df=yes|2016|05|22}}ProdCode= 10ShortSummary = Michael Mosley investigates the dramatic rise in e-cigarettes in recent years, and questions whether they are a health risk or a better alternative to smoking. He reports on the content of e-cigarettes, meets scientists who are studying their effects and takes up vaping himself to see how it affects his health.{{see also|Smoking in the United Kingdom}}
}}{{Episode list		Title=Why Are We Getting So Fat?df=yes|2016|06|07}}ProdCode= 11ShortSummary = With over 62 per cent of adults overweight, Cambridge geneticist Dr Giles Yeo believes that for many obese people, simply eating less is a harder than some might think. He takes a road trip around the UK and America to uncover why, meets people behind some of the shocking newspaper headlines, and through their stories, reveals truths which dispel commonly held myths about obesity.
}}{{Episode list		Title = Sports Doping: Winning at Any Cost?df=yes|2016|07|19}}ProdCode= 12ShortSummary = Dr Xand van Tulleken investigates the world of performance enhancing drugs. From the athletes seeking the rewards of fame, glory and lucrative sponsorship deals to the hundreds of thousands of people in the UK now regularly taking anabolic steroids to look good and buff up. What are these drugs? What do they do to the body? And is it worth it?
}}{{Episode list		Title = Inside CERNdf=yes|2016|08|10}}ProdCode= 13ShortSummary = With exclusive behind the scenes access - Horizon has been following the highs and lows of an extraordinary story in particle physics. In June 2015 teams at CERN started running the Large Hadron Collider at the highest energy ever. Rumours quickly emerged that they were on the brink of a huge discovery. A mysterious bump in some data suggested a first glimpse of a brand new particle that could change our understanding of how the universe works.
}}{{Episode list		Title = My Amazing Twindf=yes|2016|08|25}}ProdCode= 14ShortSummary = The acerbically witty and severely facially disfigured broadcaster Adam Pearson presents a personal film about genetics. He and his twin brother, Neil, are genetically identical, and both share the same genetic disease, Neurofibromatosis 1 (Nf1) - yet they are completely different. Adam's face is covered with growths, whereas Neil looks completely normal. Neil has short term memory loss, whereas Adam is razor sharp.
}}{{Episode list		Title = Jimmy Carr and the Science of Laughterdf=yes|2016|09|11}}ProdCode= 15ShortSummary = Jimmy and his guests try to get to the bottom of what laughter is, why we enjoy it so much, and what, if anything, it has to do with comedy. Between them, and with the help of contributions from other scientists on film, Jimmy and guests discover that laughter is much older than our species, and may well have contributed to making us human.
}}{{Episode list		Title = The Lost Tribes of Humanitydf=yes|2016|10|12}}ProdCode= 16ShortSummary = Alice Roberts explores the latest discoveries in the study of Human Origins, revealing the transformation that has been brought about in this field by genetics.
}}{{Episode list		Title = The Wildest Weather in the Universedf=yes|2016|10|23}}ProdCode= 17ShortSummary = Scientists have started looking to the heavens and wondering what the weather might be like on other planets. We are witnessing the birth of extra-terrestrial meteorology, as technology is allowing astronomers to study other planets like never before.
}}

Series 53: 2017

TitleOriginal broadcast dateEpisode{{Episode listTitle = Clean Eating: The Dirty Truthdf=yes|2017|01|19}}ProdCode= 01ShortSummary = Dr Giles Yeo investigates the latest diet craze and social media sensation, clean eating. Giles cooks with Ella Mills, the Instagram entrepreneur behind Deliciously Ella, and examines how far her plant based cooking is based on science.
}}{{Episode list		Title = Hair Care Secretsdf=yes|2017|01|23}}ProdCode= 02ShortSummary = A team of scientists and doctors investigate the incredible, natural material that is growing out of our heads, our hair. With access to the laboratories of some of the world's leading hair care companies, the team explore the latest research.
}}{{Episode list		Title = ADHD and Me with Rory Bremnerdf=yes|2017|04|25}}ProdCode= 03ShortSummary = Comedian and impressionist Rory Bremner is on a personal mission to uncover the science of ADHD, Attention Deficit Hyperactivity Disorder, a condition which he has suspected he has. In this film, Rory learns about the science of ADHD, goes for a diagnosis, and tries the drug methylphenidate for the first time, just before walking on stage.
}}{{Episode list		Title = Why Did I Go Mad?df=yes|2017|05|02}}ProdCode= 04ShortSummary = "Horizon" follows three people living with voices, hallucinations and paranoia, to explore what causes this kind of phenomena. Providing a rare first-hand insight into these experiences, they reveal just what it is like to live with them day-to-day.
}}{{Episode list		Title = Strange Signals from Outer Space!df=yes|2017|05|16}}ProdCode= 05ShortSummary = For decades some have suspected there might be others out there, intelligent beings capable of communicating with us. It might sound like fiction, but scientists from across the globe are scouring the universe for signals from extra terrestrials. The signals and material covered include the Lorimer fast radio burst of 2006, colliding neutron stars, the search at the Green Bank Telescope for radio signals from Tabby's Star, and the possibility there is a Dyson Sphere there.[99]
}}{{Episode list		Title = Space Volcanoesdf=yes|2017|05|23}}ProdCode= 06ShortSummary = Volcanoes have long helped shape the Earth. "Horizon" follows an international team of volcanologists in Iceland as they draw fascinating parallels with the volcanoes on Earth and those elsewhere in the solar system.
}}{{Episode list		Title = Antarctica: Ice Station Rescuedf=yes|2017|06|07}}ProdCode= 07ShortSummary = Britain's state-of-the-art Antarctic research base Halley VI is in trouble. Built on the Brunt Ice Shelf, it sits atop a massive slab of ice that extends far beyond the Antarctic shoreline. But the ice is breaking apart and just 6km from the station is an enormous crevasse, which threatens to separate Halley from the rest of the continent, setting the £28 million base adrift on a massive iceberg.
}}{{Episode list		Title = Cyber Attack: The Day the NHS Stoppeddf=yes|2017|06|12}}ProdCode= 08ShortSummary = Telling the inside story of the widespread and devastating WannaCry ransomware attack that hit the National Health Service in May 2017. The incident started in the morning. Appointment systems, pathology labs, x-rays and even CT Scanners were infected.
}}{{Episode list		Title = 10 Things You Need To Know About The Futuredf=yes|2017|06|19}}ProdCode= 09ShortSummary = Hannah Fry investigates the questions the British public want answered about the future. Hannah will try to discover whether we could ever live forever or if there will ever be a cure for cancer.
}}{{Episode list		Title = Dawn of the Driverless Cardf=yes|2017|06|29}}ProdCode= 10ShortSummary = "Horizon" enters a world where cars will drive themselves, a world where we are simply passengers, ferried about by wholesome green compassionate technology which will never ever go wrong. And it's almost here.
}}{{Episode list		Title = Dippy and the Whaledf=yes|2017|07|13}}ProdCode= 11ShortSummary = Over the last two years, "Horizon" has been behind-the-scenes at the Natural History Museum, following the dramatic replacement of the iconic "Dippy the Dinosaur" skeleton cast with the real skeleton of a blue whale, the world's biggest animal.
}}{{Episode list		Title = What Makes a Psychopath?df=yes|2017|08|29}}ProdCode= 12ShortSummary = Psychologist Uta Frith takes an in-depth look at the psychopathic mind, including one of the most notorious of all, Moors murderer Ian Brady.
}}{{Episode list		Title = Mars: A Traveller's Guidedf=yes|2017|09|12}}ProdCode= 13ShortSummary = With the dream of sending humans to Mars closer than ever before, the world's leading experts on Mars are asked where they would visit, and what they would need to survive. Real images and data bring these Martian landmarks to life.
}}{{Episode list		Title = Goodbye Cassini: Hello Saturndf=yes|2017|09|18}}ProdCode= 14ShortSummary = Celebrating the achievements and discoveries of a mission that has changed the way we see the Solar System as, after 13 years traversing the Saturn system (moons and rings), spacecraft Cassini is to plunge to a fiery death, becoming part of the planet it has explored.
}}{{Episode list		Title = Being Transgenderdf=yes|2017|09|26}}ProdCode= 15ShortSummary = Exploring what it means to be transgender and what happens when a person transitions psychologically, physically and biologically. Following a number of transgender people going through their own transition.
}}

Series 54: 2018

TitleOriginal broadcast dateEpisode{{Episode listTitle = My Amazing Brain: Richard's Wardf=yes|2018|02|05}}ProdCode= 01ShortSummary = Observational film, made over four years documenting Richard Gary's remarkable recovery from a catastrophic brain haemorrhage. An insight into the physical, psychological and emotional process of relearning how to live after a severe brain injury.
}}{{Episode list		Title = Teenagers vs Cancer: A User's Guidedf=yes|2018|06|26}}ProdCode= 02ShortSummary = How 11 teenagers and young adults deal with cancer diagnosis and treatment. (see also Teenage Cancer Trust)[100]
}}{{Episode list		Title = How to Build a Time Machinedf=yes|2018|07|10}}ProdCode= 03ShortSummary = Examining time travel and meeting scientists working on the cutting edge of discovery.
}}{{Episode list		Title = Spina Bifida & Medf=yes|2018|07|26}}ProdCode= 04ShortSummary = How pioneering foetal surgery could transform the lives of babies with spina bifida.
}}{{Episode list		Title = Jupiter Revealeddf=yes|2018|08|07}}ProdCode= 05ShortSummary = Scientists reveal the wonders of Jupiter, using information from NASA's Juno mission.
}}{{Episode list		Title = Stopping Male Suicidedf=yes|2018|08|21}}ProdCode= 06ShortSummary = Investigating why suicide is the biggest killer of men under 50 in the UK.
}}{{Episode list		Title = A Week Without Lying: The Honesty Experimentdf=yes|2018|08|29}}ProdCode= 07ShortSummary = Scientists use new technology to discover what our world would be like if we couldn't lie.
}}{{Episode list		Title = The Horizon Guide to AIdf=yes|2018|09|04}}ProdCode= —ShortSummary = Documentary looking at the perception of AI from 1964 to the present day.
}}{{Episode list		Title = The Placebo Experiment: Can My Brain Cure My Body?df=yes|2018|10|04}}ProdCode= 08ShortSummary = Could the power of fake pills be used to treat some of our most common medical complaints?
}}{{Episode list		Title = Body Clock: What makes us tick?df=yes|2018|10|11}}ProdCode= 09ShortSummary = We all have a biological clock ticking away inside us that governs our daily rhythms. This affects our health as much as our diet and whether we exercise. So what can we do to manage this internal clock better?
}}{{Episode list		Title = Avalanche: Making a Deadly Snowstormdf=yes|2018|10|21}}ProdCode= 10ShortSummary = Documentary following a team of international scientists who conduct an experiment in the Canadian Rockies to trigger an avalanche and investigate its effects.
}}{{Episode list		Title = Vitamin Pills: Miracle or Myth?df=yes|2018|10|25}}ProdCode= 11ShortSummary = The vitamin industry is worth more than £400million in the UK alone. This investigation into vitamin supplements looks at their possible effects and whether they are necessary as part of a normal diet.
}}{{Episode list		Title = Diagnosis on Demand? The Computer Will See You Nowdf=yes|2018|11|01}}ProdCode= 12ShortSummary = Could a machine replace your doctor? Dr Hannah Fry explores the incredible ways AI is revolutionising healthcare - and what this means for all of us.
}}{{Episode list		Title = The Contraceptive Pill: How Safe Is It?df=yes|2018|11|19}}ProdCode= 13ShortSummary = GP Dr Zoe Williams investigates the contraceptive pill - exploring the latest scientific research and investigating the future of birth control.
}}

Series 55: 2019

TitleOriginal broadcast dateEpisode{{Episode listTitle = We Need to Talk About Deathdf=yes|2019|01|23}}ProdCode= 01ShortSummary = Dr Kevin Fong makes a personal journey through the moral questions about death that face not just the medical profession, but each and every person. The question of how people die is a question that everyone must face, and yet people avoid talking about it.
}}

References

{{refbegin}}
General
  • "Horizon archives". BBC Retrieved on 2009-12-08
  • "Horizon episodes coming up". BBC Retrieved on 2009-12-08
  • "Recent Horizons". BBC Retrieved on 2009-12-08
  • "Episode Guide". BBC Retrieved 2013-02-01
Specific
{{refend}}
1. ^Radio Times, issue 2112, 2 May 1964
2. ^Radio Times, Issue 2116, 30 May 1964
3. ^Radio Times, Issue 2149, 20 January 1965
4. ^Radio Times, Issue 2155, 3 March 1965
5. ^{{imdb title|6213120|Restless Genius/Faster Farther, Higher}}
6. ^{{cite journal | url=https://genome.ch.bbc.co.uk/edf9feb76f274e6b8e926173b112c391 | title=Horizon - BBC Two England | journal=Radio Times | year=12 May 1965 | issue=2165 | publisher=BBC Genome}}
7. ^Radio Times, issue 2187, 10 October 1965
8. ^Radio Times, issue 2189, 24 October 1965
9. ^Radio Times, issue 2191, 7 November 1965
10. ^Radio Times, Issue 2187, 10 October 1965
11. ^Radio Times, Issue 2195, 5 December 1965
12. ^Radio Times, Issue 2199, 2 January 1966
13. ^Radio Times, issue 2239, 10 October 1966
14. ^Radio Times, issue 2241, 24 October 1966
15. ^Radio times, issue 2243 7 November 1966
16. ^BBC Radio Times, Issue 2245, 21 November 1966
17. ^BBC Radio Times, Issue 2247, 5 December 1966
18. ^BBC Radio Times, Issue 2253, 17 January 1967
19. ^BBC Radio Times, Issue 2257, 14 February 1967
20. ^BBC Radio Times, Issue 2259, 28 February 1967
21. ^Radio Times, Issue 2261, 14 March 1967
22. ^Radio Times, issue 2263, 28 March 1967
23. ^Radio Times, issue 2267, 25 April 1967
24. ^Radio Times, issue 2269, 9 May 1967
25. ^Radio Times, issue 2275, 20 June 1967
26. ^BBC Radio Times, Issue 2287, 12 September 1967
27. ^BBC Radio Times, Issue 2289, 26 September 1967
28. ^Radio Times, Issue 2291, 10 October 1967
29. ^Radio Times, Issue 2293, 24 October 1967
30. ^Radio Times, Issue 2295, 7 November 1967
31. ^Radio Times, Issue 2297, 21 November 1967
32. ^Radio Times, Issue 2299, 5 December 1967
33. ^Radio Times, Issue 2302, 24 December 1967
34. ^Radio Times, Issue 2303, 2 January 1968
35. ^Radio Times, Issue 2307, 30 January 1968
36. ^Radio Times, Issue 2309, 13 February 1968
37. ^Radio Times, Issue 2311, 22 February 1968
38. ^Radio Times, Issue 2313, 7 March 1968
39. ^Radio Times, Issue 2315, 21 March 1968
40. ^Radio Times, Issue 2317, 4 April 1968
41. ^Reynolds, Stanley, TELEVISION, The Guardian, 13 September 1968
42. ^Reynolds, Stanley, TELEVISION, The Guardian; 26 October 1968
43. ^Radio Times, issue 2,346 24 October 1968
44. ^Radio Times, Issue 2,353 19 December 1968
45. ^Dawson, Helen, THE WEEK'S TV, The Observer, 26 April 1970
46. ^Radio Times, Issue 2498, 23 September 1971
47. ^Radio Times, Issue 2553, 19 October 1972
48. ^Radio Times Issue 2,970 9 October 1980
49. ^Radio Times, issue 3020, 28 September 1981
50. ^Radio Times, issue 3075, 18 October 1982
51. ^Radio Times, Issue 3124, 26 September 1983
52. ^Radio Times, Issue 3127, 16 October 1983
53. ^Radio Times, Issue 3127, 17 October 1983
54. ^Radio Times, Issue 3128, 24 October 1983
55. ^Radio Times, Issue 3141, 19 January 1984
56. ^Radio Times, Issue 3182
57. ^Radio Times, issue 3252, 24 March 1986
58. ^Radio Times, Issue 3459, 29 March 1990
59. ^Radio Times, Issue 3,460 9 April 1990
60. ^Radio Times, Issue 3564, 16 April 1992
61. ^{{cite web|url=https://bioethicsbytes.wordpress.com/category/horizon/|title=Horizon - BioethicsBytes|website=bioethicsbytes.wordpress.com}}
62. ^{{cite news|url=https://www.telegraph.co.uk/news/uknews/1377806/BBC-re-edits-Horizon-after-watchdogs-attack.html|title=BBC re-edits Horizon after watchdog's attack|last=Highfield|first=Roger| authorlink =Roger Highfield|date=11 Dec 2000|work=The Daily Telegraph|accessdate=21 June 2014}}
63. ^{{cite web | url=http://www.bbc.co.uk/science/horizon/2003/learnthink.shtml | title=The Day We Learned To Think | publisher=BBC | work=Horizon | date=February 20, 2003 | accessdate=March 20, 2018}}
64. ^{{cite web|url=http://www.bbc.co.uk/science/horizon/2003/percypilcher.shtml|title=BBC - Science & Nature - Horizon - Percy Pilcher's Flying Machine|website=www.bbc.co.uk}}
65. ^http://www.bbc.co.uk/science/horizon/2004/troy.shtml The Truth of Troy - programme summary
66. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/survivorsguide/index.shtml|title=BBC - Horizon - Survivors Guide to Plane Crashes|website=www.bbc.co.uk}}
67. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/chimps/|title=BBC - Horizon - Chimps are People too|website=www.bbc.co.uk}}
68. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/faces/|title=BBC - Horizon - The World's first Face Transplant|website=www.bbc.co.uk}}
69. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/singularity/|title=BBC - Horizon - Human v2.0|website=www.bbc.co.uk}}
70. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/robotrace/|title=BBC - Horizon - The Great Robot Race|website=www.bbc.co.uk}}
71. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/aliens/|title=BBC - Horizon - We are the Aliens|website=www.bbc.co.uk}}
72. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/petdinosaur/|title=BBC - Horizon - My Pet Dinosaur|website=www.bbc.co.uk}}
73. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/elephant/|title=BBC - Horizon - The Elephant's Guide to Sex|website=www.bbc.co.uk}}
74. ^Radio Times, Issue 4328, 27 March 2007
75. ^Radio Times, Issue 4329, 3 April 2007
76. ^Radio Times, Issue 4330, 10 April 2007
77. ^Radio Times, Issue 4331, 17 April 2007
78. ^Radio Times, Issue 4332, 24 April 2007
79. ^Radio Times Issue 4355, 27 September 2007
80. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/isolation/|title=BBC - Horizon - Total Isolation|website=www.bbc.co.uk}}
81. ^{{cite web|url=http://topdocumentaryfilms.com/what-on-earth-is-wrong-with-gravity/|title=What on Earth is Wrong With Gravity?|publisher=}}
82. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/drugs/|title=BBC - Horizon - Is alcohol worse than ecstasy?|website=www.bbc.co.uk}}
83. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/decisions/|title=BBC - Horizon - How to make better decisions|website=www.bbc.co.uk}}
84. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/101/|title=BBC - Horizon - How to live to 101|website=www.bbc.co.uk}}
85. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/alone/|title=BBC - Horizon - Total Isolation|website=www.bbc.co.uk}}
86. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/bodyparts/|title=BBC - Horizon - How much is your dead body worth?|website=www.bbc.co.uk}}
87. ^{{cite web|url=http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/memory/|title=BBC - Horizon - How does your memory work?|website=www.bbc.co.uk}}
88. ^{{cite web | url=https://www.worldcat.org/title/why-do-we-talk/oclc/609898208 | title=Why do we talk? (DVD video, 2010) | publisher=WorldCat.org | accessdate=March 4, 2019 | OCLC=609898208}}
89. ^{{cite web | url=http://cultureofempathy.com/References/Experts/Paul-Zak.htm | title=Culture of Empathy Builder: Paul Zak | publisher=Center for Building a Culture of Empathy | accessdate=November 13, 2017}}
90. ^{{imdb title|2051240|Are You Good or Evil?-Horizon, 7 September 2011}}
91. ^{{cite web|url=https://www.bbc.co.uk/programmes/b006mgxf/episodes/guide|title=BBC Two - Horizon - Episode guide|website=BBC}}
92. ^{{cite web | url=http://www.rainybrainsunnybrain.com/television/bbc-horizon-documentary-the-truth-about-personality/ | title=BBC Horizon Documentary – The Truth about Personality _ Rainy Brain Sunny Brain by Professor Elaine Fox | publisher=Professor Elaine Fox | work=Rainy Brain Sunny Brain | accessdate=30 October 2014}}
93. ^{{IMDb title|3054338|'Horizon' The Truth About Personality}}
94. ^{{Cite episode | title = How You Really Make Decisions | url = http://www.bbc.co.uk/programmes/b03wyr3c | accessdate = 2014-02-26 | series = Horizon | serieslink = Horizon (BBC TV series) | network = BBC | station = BBC Two | city = | date = February 19, 2019 | seriesno = 2013-2014 | number = 9 }}
95. ^{{Cite episode | title = How do we really make decisions? | url = https://www.bbc.com/news/science-environment-26258662 | accessdate = February 19, 2019 | series = Horizon | network = BBC | station = BBC Two | city = | date = February 24, 2014 | seriesno = 2013-2014 | number = 9 }}
96. ^{{imdb title|3560676|How You Really Make Decisions}}
97. ^{{cite web|url=https://www.theguardian.com/science/2000/mar/27/uknews|title=BAe's anti-gravity research braves X-Files ridicule|first=James|last=Meek|date=27 March 2000|website=the Guardian}}
98. ^{{cite web | url=http://www.radiotimes.com/episode/d4ssc6/horizon--the-end-of-the-solar-system | title=Horizon: The End of the Solar System | work=Radio Times | accessdate=April 16, 2016 | author=Rose, Gary}}
99. ^{{bbc programme|b08r3xr3|Strange Signals from Outer Space!}}
100. ^{{cite web | url=https://www.teenagecancertrust.org/teenagersvscancer | title=Teenagers vs Cancer: A User's Guide | publisher=Teenage Cancer Trust | date=June 26, 2018 | accessdate=September 9, 2018}}
{{Expand list|date=February 2011}}{{DEFAULTSORT:Horizon}}

3 : BBC science|Horizon (documentary series)|Lists of British non-fiction television series episodes
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