 | 12x01 Al Franken, Jason Bateman, Breaking Benjamin [add summary] | Aug. 31, 2004 |
 | 12x02 John C. Reilly, Ja Rule, David Feherty [add summary] | Sep. 01, 2004 |
 | 12x03 Dave Chappelle, Rose Byrne, Sam Roberts [add summary] | Sep. 02, 2004 |
 | 12x04 Jeremy Piven, Tim Meadows, Bruce Hornsby [add summary] | Sep. 03, 2004 |
 | 12x05 Andy Richter, Neve Campbell, Jane Monheit [add summary] | Sep. 07, 2004 |
 | 12x06 Bill Maher, Duane "dog" Chapman, Radio 4 [add summary] | Sep. 08, 2004 |
 | 12x07 Matthew Broderick, Denise Richards, Dave Eggers [add summary] | Sep. 09, 2004 |
 | 12x08 Paris Hilton, Stuart Townsend, Scissor Sisters [add summary] | Sep. 10, 2004 |
 | 12x09 Donald Trump, Wayne Brady, Crossfade [add summary] | Sep. 14, 2004 |
 | 12x10 Megan Mullally, Tony Danza, Jud Hale [add summary] | Sep. 15, 2004 |
 | 12x11 Gwyneth Paltrow, Paul Bettany, Drive-By Truckers [add summary] | Sep. 16, 2004 |
 | 12x12 Drew Barrymore, Mark Cuban, Emo Phillips [add summary] | Sep. 17, 2004 |
 | 12x13 Tiger Woods, Selma Blair, Tears For Fears [add summary] | Sep. 21, 2004 |
 | 12x14 Matt LeBlanc, Anthony Edwards, Terry Gross [add summary] | Sep. 22, 2004 |
 | 12x15 Tom Brokaw, Katie Holmes, Robert Schimmel [add summary] | Sep. 23, 2004 |
 | 12x16 Rob Lowe, Jill Hennessy, Elvis Costello [add summary] | Sep. 24, 2004 |
 | 12x17 Jim Belushi, Eve, Keane [add summary] | Sep. 28, 2004 |
 | 12x18 Christopher Walken, Dylan Walsh, Wilco [add summary] | Sep. 29, 2004 |
 | 12x19 James Spader, Amy Poehler, Kenny Hotz & Spencer Rice [add summary] | Sep. 30, 2004 |
 | 12x20 Joaquin Phoenix, Teri Hatcher, Supergrass [add summary] | Oct. 01, 2004 |
 | 12x21 Jimmy Fallon, Chad Michael Murray, Good Charlotte [add summary] | Oct. 05, 2004 |
 | 12x22 Hilary Duff, Anthony Kiedis, Rilo Kiley [add summary] | Oct. 06, 2004 |
 | 12x23 Drew Carey, Carolyn Kepcher, Mo Rocca [add summary] | Oct. 07, 2004 |
 | 12x24 Sean "P. Diddy" Combs, Dave Navarro, Interpol [add summary] | Oct. 08, 2004 |
 | 12x25 Brian Williams, Tom Green. Mitch Hedberg [add summary] | Oct. 12, 2004 |
 | 12x26 Matt Stone & Trey Parker, Seth Meyers, The Libertines [add summary] | Oct. 13, 2004 |
 | 12x27 Al Roker, Tracy Morgan, Jimmy Eat World [add summary] | Oct. 14, 2004 |
 | 12x28 Jason Schwartzman, Jason Ritter, Sum 41 [add summary] | Oct. 15, 2004 |
 | 12x29 Allison Janney, James Ellroy, The Black Keys [add summary] | Oct. 19, 2004 |
 | 12x30 Claire Danes, Carson Kressley, Mavis Staples [add summary] | Oct. 20, 2004 |
 | 12x31 Jude Law, Meredith Vieira, The Explosion [add summary] | Oct. 21, 2004 |
 | 12x32 Sarah Michelle Gellar, Will Arnett, Rob Mies (Bat Expert) [add summary] | Oct. 22, 2004 |
 | 12x33 Hank Azaria, Tommy Lee, Jet [add summary] | Nov. 03, 2004 |
 | 12x34 Jay-Z, Jerry O'Connell, The Music [add summary] | Nov. 04, 2004 |
 | 12x35 Eva Longoria, Terry Francona, Sarah Vowell [add summary] | Nov. 05, 2004 |
 | 12x36 Tina Fey, Spencer Fox, Fatboy Slim [add summary] | Nov. 09, 2004 |
 | 12x37 Salma Hayek, Adam Brody, Josh Groban [add summary] | Nov. 10, 2004 |
 | 12x38 Pierce Brosnan, Paget Brewster, Beastie Boys [add summary] | Nov. 11, 2004 |
 | 12x39 Chazz Palminteri, Marcia Cross, Arj Barker [add summary] | Nov. 12, 2004 |
 | 12x40 Tim Allen, Eddie Izzard, Chingy [add summary] | Nov. 16, 2004 |
 | 12x41 Dan Aykroyd, Ayda Field, Mike Lupica [add summary] | Nov. 17, 2004 |
 | 12x42 Woody Harrelson, Paul Reubens, The Flaming Lips [add summary] | Nov. 18, 2004 |
 | 12x43 William Shatner, Patton Oswalt, The Neville Brothers [add summary] | Nov. 19, 2004 |
 | 12x44 Kelsey Grammer, Rosario Dawson, Lee Lindeman [add summary] | Nov. 23, 2004 |
 | 12x45 John Tesh, Horation Sanz, Velvet Revolver [add summary] | Nov. 24, 2004 |
 | 12x46 Steve Irwin, Paul Giamatti, The Zutons [add summary] | Nov. 25, 2004 |
 | 12x47 Colin Farrell, Craig Bierko, Sparta [add summary] | Nov. 26, 2004 |
 | 12x48 Val Kilmer, Peter Gallagher, The Killers [add summary] | Nov. 30, 2004 |
 | 12x49 Diane Sawyer, Thomas Haden Church, The Hives [add summary] | Dec. 01, 2004 |
 | 12x50 Alec Baldwin, Jason Biggs, Guided By Voices [add summary] | Dec. 02, 2004 |
 | 12x51 Brooke Shields, Ryan Reynolds, Todd Barry [add summary] | Dec. 03, 2004 |
 | 12x52 Kevin Spacey, Billy Connolly, Skindred [add summary] | Dec. 14, 2004 |
 | 12x53 Liam Neeson, Triple H, Avril Lavigne [add summary] | Dec. 15, 2004 |
 | 12x54 Téa Leoni, Marc Maron, Neil McCalmont [add summary] | Dec. 16, 2004 |
 | 12x55 Adam Sandler, My Chemical Romance [add summary] | Dec. 17, 2004 |
 | 12x56 Jeff Goldblum, Joy Behar, Nellie McKay [add summary] | Dec. 21, 2004 |
 | 12x57 Whoopi Goldberg, Danny Masterson, Lewis Black [add summary] | Dec. 22, 2004 |
 | 12x58 Bill Murray, Tony Bennett [add summary] | Dec. 23, 2004 |
 | 12x59 Clyde Peeling, Kenan Thompson, Eugene Mirman [add summary] | Dec. 28, 2004 |
 | 12x60 Carson Daly, Rich Hall, Gov't Mule [add summary] | Dec. 29, 2004 |
 | 12x61 Snoop Dogg, Keri Russell, Mos Def [add summary] | Dec. 30, 2004 |
 | 12x62 New Year's Eve Show: Darrell Hammond, Susie Essman, The Ditty Bops [add summary] | Dec. 31, 2004 |
 | 12x63 Samuel L. Jackson, Maura Tierney, Tegan & Sara [add summary] | Jan. 11, 2005 |
 | 12x64 John Mayer, Patrick Wilson, Twista & Faith Evans [add summary] | Jan. 12, 2005 |
 | 12x65 Topher Grace, Nia Long, Jim Gaffigan [add summary] | Jan. 13, 2005 |
 | 12x66 Dennis Quaid, Frank, Senses Fail [add summary] | Jan. 14, 2005 |
 | 12x67 Heidi Klum, Harland Williams, Joss Stone [add summary] | Jan. 18, 2005 |
 | 12x68 Ice Cube, Carmen Elektra, Ray LaMontagne [add summary] | Jan. 19, 2005 |
 | 12x69 Ethan Hawke, Randy Jackson, Sharon Jones & The Dap Kings [add summary] | Jan. 20, 2005 |
 | 12x70 John Leguizamo, Nicole Richie, Tariq "Kingflex" Nasheed [add summary] | Jan. 21, 2005 |
 | 12x71 Alan Alda, Jeffrey Tambor, Arcade Fire [add summary] | Feb. 01, 2005 |
 | 12x72 Donald Trump, Mekhi Phifer, Demetri Martin [add summary] | Feb. 02, 2005 |
 | 12x73 Brian Williams, Jimmy Buffett, Maroon 5 [add summary] | Feb. 03, 2005 |
 | 12x74 Sharon Osbourne, Dermot Mulroney, Jem [add summary] | Feb. 04, 2005 |
 | 12x75 Simon Cowell, Will Forte, The Dirty Dozen Brass Band [add summary] | Feb. 08, 2005 |