The show is broadcast from Sunday to Thursday. Since it broadcasts at 10 p.m. to 12 a.m Pacific Time Zone occasionally shows will be listed incorrectly with the next day's date. If a show's date corresponds to a Friday or a Saturday, it is almost certainly incorrect. Sunday episodes are identified in the table by gray shading.
| Date | Guest(s) | Notes |
|---|
| 2003-01-01 | Best of Loveline, with Alanis Morissette, 311, Vanessa Carlton, Eminem |
| 2003-01-02 | Best of Loveline, with Jack Osbourne, Sum 41, David Alan Grier, Henry Rollins |
| 2003-01-05 | No guest |
| 2003-01-06 | Kathy Griffin | From the TV show Celebrity Mole |
| 2003-01-07 | No guest |
| 2003-01-08 | No guest |
| 2003-01-09 | No guest |
| 2003-01-12 | No guest |
| 2003-01-13 | Stephen Baldwin | From the TV show Celebrity Mole |
| 2003-01-15 | Corey Feldman | From the TV show The Surreal Life |
| 2003-01-19 | No guest |
| 2003-01-20 | Lynsey Bartilson | From the TV show Grounded for Life |
| 2003-01-21 | Jimmy Kimmel | From the TV show Jimmy Kimmel Live! |
| 2003-01-22 | Scott Russo & Pat "PK" Kim | From the band Unwritten Law |
| 2003-01-23 | Jerry O'Connell | From the movie Kangaroo Jack |
| 2003-01-26 | Nick Wheeler & Mike Kennerty | From the band All American Rejects |
| 2003-01-27 | Emma Caulfield | From the movie Darkness Falls |
| 2003-01-28 | Adam Rodriguez | From the TV show Miami |
| 2003-01-29 | Cheryl Hines | From the TV show Curb Your Enthusiasm |
| 2003-01-30 | James Marsters | From the TV show Buffy the Vampire Slayer |
| 2003-02-02 | Hosted by Dr. Bruce & Adam Carolla |
| 2003-02-03 | Pierre Bouvier, Chuck Comeau & David Desrosiers | From the band Simple Plan |
| 2003-02-04 | Kurtwood Smith | From the TV show That '70s Show |
| 2003-02-06 | Mark Lanegan & Josh Homme | From the band Queens of the Stone Age |
| 2003-02-09 | Jimi Mistry | From the movie The Guru |
| 2003-02-10 | Sadie Allison | Promoting the book Toygasms! The Insider's Guide to Sex Toys and Techniques |
| 2003-02-12 | Heidi Fleiss | Promoting the book Pandering |
| 2003-02-13 | Gabe Fischbarg | Promoting the book The Guide to Picking Up Girls |
| 2003-02-16 | No guest |
| 2003-02-17 | Trista Rehn | From the TV show The Bachelorette |
| 2003-02-19 | Joe Escalante & Josh Freese | From the band The Vandals |
| 2003-02-23 | Poppy Montgomery | From the TV show Without a Trace |
| 2003-02-25 | Kathy Griffin |
| 2003-02-27 | Dicky Barrett | From the band The Mighty Mighty Bosstones |
| 2003-03-02 | The Ataris | Promoting the album So Long Astoria. Adam was in Wilmington, North Carolina in preparation of shooting an appearance of Dawson's Creek. |
| 2003-03-05 | Busy Philipps, Michelle Williams, & Oliver Hudson | From the TV show Dawson's Creek. Adam and Drew were both in Wilmington shooting their Dawson's Creek appearance. |
| 2003-03-06 | Joshua Jackson | From the TV show Dawson's Creek. Adam and Drew were both in Wilmington shooting their Dawson's Creek appearance. |
| 2003-03-09 | No guest |
| 2003-03-11 | Paul Rodriguez |
| 2003-03-13 | Evan Marriott | From the TV show Joe Millionaire |
| 2003-03-16 | No guest |
| 2003-03-18 | Megyn Price | From the TV show Grounded for Life |
| 2003-03-19 | Victoria Silvstedt |
| 2003-03-20 | Greg Proops | From the TV show Whose Line is it Anyway |
| 2003-03-23 | The Used |
| 2003-03-24 | Ron Jeremy |
| 2003-03-25 | Bill Nye |
| 2003-03-26 | Monique Powell | From the band Save Ferris |
| 2003-03-27 | Missi Pyle | From the movie Bringing Down the House |
| 2003-03-30 | No guest |
| 2003-03-31 | Liam Lynch | From the band United States of Whatever |
| 2003-04-02 | Randy Jackson | From the TV show American Idol |
| 2003-04-03 | Brooks Wackerman, Greg Hetson & Greg Graffin | From the band Bad Religion |
| 2003-04-06 | No guest |
| 2003-04-08 | Hal Sparks | From the TV show Queer as Folk |
| 2003-04-09 | Paul Tracy |
| 2003-04-10 | Josh Brolin & Tommy Shane Steiner |
| 2003-04-13 | No guest |
| 2003-04-14 | Sum 41 |
| 2003-04-15 | Chevelle |
| 2003-04-16 | Foo Fighters |
| 2003-04-17 | Pete Yorn |
| 2003-04-20 | Rob Schneider |
| 2003-04-21 | Christopher Titus |
| 2003-04-22 | John McGinley & James Mangold | From the TV show Scrubs |
| 2003-04-23 | Dominic Purcell | From the TV show John Doe |
| 2003-04-24 | Jake Busey | From the movie Identity |
| 2003-04-27 | Laurie Fetter | Promoting her Playboy appearance |
| 2003-04-28 | The Donnas |
| 2003-04-29 | Jorell Washington & Paul Malbry | From the movie The Real Cancun |
| 2003-04-30 | Joseph Gordon-Levitt | From the movie Manic |
| 2003-05-04 | No guest |
| 2003-05-05 | Kelly Hu | From the movie X2: X-Men United |
| 2003-05-07 | Aisha Tyler | From the TV show Friends |
| 2003-05-11 | Hayley Arp | From the TV show Mr. Personality. Hosted by Dr. Bruce & Adam Carolla |
| 2003-05-12 | Cold |
| 2003-05-13 | Stephan Jenkins | From the band Third Eye Blind |
| 2003-05-14 | Chester Bennington & Brad Delson | From the band Linkin Park |
| 2003-05-18 | The Deftones |
| 2003-05-19 | Powerman 5000 |
| 2003-05-20 | Rosa Blasi | From the TV show Strong Medicine |
| 2003-05-25 | No guest |
| 2003-05-27 | David Alan Grier |
| 2003-06-01 | No guest |
| 2003-06-02 | Deborah Falconer |
| 2003-06-03 | Officer Louis José Hernandez | From Sober Graduation |
| 2003-06-04 | Leeann Tweeden | From the TV show The Best Damn Sports Show Period |
| 2003-06-05 | Tim Long, Matt Selman & Al Jean | From the TV show The Simpsons |
| 2003-06-08 | Good Charlotte |
| 2003-06-09 | Nikki Ziering | Promoting her Playboy appearance |
| 2003-06-10 | Transplants |
| 2003-06-11 | Bill Bellamy & Benji Madden | Bellamy, from the TV show Fastlane, is in for the first hour. Benji from Good Charlotte is in the second half. |
| 2003-06-12 | Eric Olsen & Derek Richardson | From the movie Dumb and Dumberer |
| 2003-06-15 | Chris Brown & Aaron Montgomery | From the band Trapt |
| 2003-06-16 | Sam Fogarino & Carlos Dengler | From the band Interpol, promoting the album Turn on the Bright Lights |
| 2003-06-17 | Laura Berman & Jennifer Berman | From the TV show Berman and Berman |
| 2003-06-18 | Jewel |
| 2003-06-22 | No guest |
| 2003-06-23 | Erich "Mancow" Muller |
| 2003-06-26 | Alanna Ubach | From the movie Red, White & Blonde |
| 2003-06-29 | Mark Valley | From the TV show Keen Eddie |
| 2003-06-30 | Perry Farrell, Stephen Perkins, Dave Navarro & Chris Chaney | From the band Jane's Addiction |
| 2003-07-01 | Jack Osbourne & Sharon Osbourne |
| 2003-07-02 | Carnie Wilson |
| 2003-07-03 | Best of Loveline |
| 2003-07-06 | No guest |
| 2003-07-07 | Gary Busey & Adam de la Peña | From the TV show I'm with Busey |
| 2003-07-08 | 311 |
| 2003-07-09 | Less than Jake |
| 2003-07-13 | No guest |
| 2003-07-14 | Kerri Kasem | From the TV show Beg, Borrow & Deal |
| 2003-07-15 | Brooke Burns | From the TV show Dog Eat Dog |
| 2003-07-16 | Brooke Burke |
| 2003-07-20 | Best of Loveline |
| 2003-07-21 | Eddie Kaye Thomas | From the movie American Wedding |
| 2003-07-22 | Kathy Griffin |
| 2003-07-23 | Thomas Ian Nicholas | From the movie American Wedding |
| 2003-07-27 | Fat Mike, Chris Shiflett & Dave Raun | From the band Me First and the Gimme Gimmes |
| 2003-07-29 | Ginger Lynn |
| 2003-08-03 | No guest |
| 2003-08-04 | David Alan Grier |
| 2003-08-05 | Lisa Dergan | From Fox Sports Net |
| 2003-08-06 | Traci Lords |
| 2003-08-07 | Mark McGrath & Craig Bullock | From the band Sugar Ray |
| 2003-08-10 | Robert Englund & Ken Kirzinger | From the movie Freddy vs. Jason |
| 2003-08-11 | Kelly Slater |
| 2003-08-12 | Stephen Richards & Jarrod Montague | From the band Taproot. Hosted by Dr. Michael & Adam Carolla |
| 2003-08-13 | Tony Hawk | Hosted by Dr. Ben & Adam Carolla |
| 2003-08-14 | Hosted by Dr. Bruce & Adam Carolla |
| 2003-08-17 | No guest |
| 2003-08-19 | Hosted by Dr. Bruce & Adam Carolla |
| 2003-08-20 | Christy Canyon | Promoting the book Lights, Camera, Sex |
| 2003-08-21 | Best of Loveline, with Foo Fighters, Bad Religion, Kelly Hu, Good Charlotte, Transplants, Jewel |
| 2003-08-24 | Best of Loveline, with Sum 41 |
| 2003-08-25 | Best of Loveline, with Gary Busey, Alanis Morissette The Used, Joshua Jackson |
| 2003-08-26 | Best of Loveline, with Chevelle, Stephen Baldwin, Robert Downey Jr., Linkin Park, Jack & Sharon Osbourne |
| 2003-08-27 | Best of Loveline, with System of a Down, Randy Jackson, Janes Addiction Josh Brolin, Aisha Tyler |
| 2003-08-28 |
| 2003-08-31 | No guest |
| 2003-09-01 | Seth Green | From the movie Party Monster |
| 2003-09-02 | Ken Casey & James Lynch | From the band Dropkick Murphys. Hosted by Dr. Ben & Adam Carolla |
| 2003-09-03 | Hosted by Dr. Bruce & Adam Carolla |
| 2003-09-04 | Busy Philipps | From the movie Home Room. Hosted by Dr. Marcel & Adam Carolla |
| 2003-09-07 | Jim Lindberg & Byron McMackin | From the band Pennywise |
| 2003-09-10 | Dr. Gary Alter | From the TV show Dr. 90210 |
| 2003-09-11 | Riley Breckenridge & Dustin Kensrue | From the band Thrice |
| 2003-09-15 | No guest |
| 2003-09-15 | Ralph Garman | From the TV show The Joe Schmo Show |
| 2003-09-16 | Sarah Fisher & Dan Wheldon |
| 2003-09-17 | Wilmer Valderrama | From the movie Party Monster |
| 2003-09-18 | Davey Havok & Jade Puget | From the band AFI |
| 2003-09-21 | Andy Dick | From the TV show Less Than Perfect |
| 2003-09-22 | Chad Kroeger & Ryan Peake | From the band Nickelback |
| 2003-09-23 | Suzanne Stratford | From the TV station WJW |
| 2003-09-28 | Sara Rue | From the TV show Less Than Perfect |
| 2003-09-29 | Bob Guiney | From the TV show The Bachelor |
| 2003-09-30 | Bill Bellamy |
| 2003-10-01 | Robin Zander & Tom Petersson | From the band Cheap Trick |
| 2003-10-02 | Peter Facinelli & Ethan Embry | From the movie Stealing Time |
| 2003-10-05 | No guest |
| 2003-10-06 | Jimmy Kimmel | From the movie Windy City Heat |
| 2003-10-07 | Ben Stein | Promoting the book How to Ruin Your Love Life |
| 2003-10-08 | Marilyn Manson | Promoting the album The Golden Age of Grotesque |
| 2003-10-09 | Sarah Silverman | From the movie The School of Rock |
| 2003-10-12 | No guest |
| 2003-10-13 | Randy Savage | Promoting the album Be A Man |
| 2003-10-14 | Kelly Osbourne | From the TV show The Osbournes |
| 2003-10-16 | Eric Balfour | From the movie The Texas Chainsaw Massacre |
| 2003-10-19 | No guest |
| 2003-10-20 | Andrew McMahon, Brian Ireland & William Tell | From the band Something Corporate, promoting the album North |
| 2003-10-22 | Lindsay Price & Jay Harrington | From the TV show Coupling |
| 2003-10-23 | Matt Rubano, Fred Mascherino & Adam Lazzara | From the band Taking Back Sunday promoting the album Tell All Your Friends |
| 2003-10-26 | Ryan Key, Alex Lewis & Ben Harper | From the band Yellowcard promoting the album Ocean Avenue |
| 2003-10-28 | Jason Bateman & Will Arnett | From the TV show Arrested Development |
| 2003-10-30 | Nick Wheeler, Chris Gaylor, Tyson Ritter & Mike Kennerty | From the band All American Rejects |
| 2003-11-02 | No guest |
| 2003-11-03 | Bianca Kajlich | From the TV show Rock Me Baby |
| 2003-11-04 | John Collura & Chris Knapp | From the band The Ataris |
| 2003-11-05 | Adrian Young, Annabella Lwin & Leigh Gorman | From the bands No Doubt & Bow Wow Wow |
| 2003-11-06 | Jack Black & Kyle Gass | From the band Tenacious D |
| 2003-11-09 | No guest |
| 2003-11-10 | Triumph the Insult Comic Dog | aka Robert Smigel promoting the CD Come Poop with Me |
| 2003-11-11 | Brad Delson & Joe Hahn | From the band Linkin Park promoting the album Live in Texas |
| 2003-11-12 | Eric Bobo, Sen Dog & B-Real | From the band Cypress Hill |
| 2003-11-13 | Dave Buckner, Mia Tyler | From the band Papa Roach |
| 2003-11-16 | Adam Rodriguez | From the TV show Miami |
| 2003-11-17 | Wes Scantlin | From the band Puddle of Mudd promoting the album Life on Display |
| 2003-11-18 | Adam Brody & Peter Gallagher | From the TV show The O.C. |
| 2003-11-19 | Pink | Promoting the album Try This. Hosted by Dr. Drew & Stryker |
| 2003-11-23 | Rob Schneider |
| 2003-11-24 | Benji Madden & Joel Madden | From the band Good Charlotte promoting the album The Young and the Hopeless |
| 2003-11-25 | Mark Hoppus & Travis Barker | From the band Blink-182 promoting the album (untitled) |
| 2003-11-26 | Ron Livingston | From the movie The Cooler |
| 2003-11-27 | Best of Loveline |
| 2003-11-30 | No guest |
| 2003-12-01 | Macy Gray | Promoting the album The Trouble With Being Myself |
| 2003-12-02 | Kathy Griffin | From the TV show Average Joe |
| 2003-12-03 | Tori Amos | Promoting the album Tales of a Librarian |
| 2003-12-07 | Dicky Barrett | From the band The Mighty Mighty Bosstones |
| 2003-12-08 | Nicole Richie | From the TV show The Simple Life |
| 2003-12-09 | Joshua Malina | From the TV show The West Wing |
| 2003-12-11 | David Alan Grier | From the TV show Life with Bonnie |
| 2003-12-14 | Best of Loveline |
| 2003-12-15 | Mark Wilson & Chris Cester | From the band Jet promoting the album Get Born |
| 2003-12-16 | Doug Robb & Dan Estrin | From the band Hoobastank |
| 2003-12-17 | Michelle Branch | Promoting the single "Breathe" |
| 2003-12-18 | Adam Goldberg |
| 2003-12-21 | Christopher Titus |
| 2003-12-22 | Riley Breckenridge & Dustin Kensrue | From the band Thrice |
| 2003-12-24 | Best of Loveline |
| 2003-12-25 | Best of Loveline |
| 2003-12-28 | Best of Loveline, with David Alan Grier, Triumph the Insult Comic Dog, Sara Rue, Brooke Burns, Peter Gallagher, Adam Brody, AFI |
| 2003-12-29 | Best of Loveline, with Pink, The Ataris, Victoria Silvstedt, Marilyn Manson, Heidi Fleiss, Pete Yorn |
| 2003-12-30 | Best of Loveline, with Andy Dick, Trista Rehn, 311, Jack Black, Kyle Gass |