- H. Jon Benjamin
- Â Ken Fold 2 episodes, 2004
- David Cross
- Â Ben 2 episodes, 2004
- Sam Seder
- Â Max Rabin 2 episodes, 2004
- Sarah Silverman
- Â Susan Underman 2 episodes, 2004
- David Earl Waterman
- Â Earl Wotterman 2 episodes, 2004
- Tim Bagley
- Â Jack Hiting 2 episodes, 2004
- Matt Price
- Â Matt Prise 2 episodes, 2004
- Gabriel Tigerman
- Â Gabriel 'Gabe' Tigerman 2 episodes, 2004
- Marc Maron
- Â Marc Victor 2 episodes, 2004
- Andy Dick
- Â Jason Reemer 1 episode, 2004
- Isla Fisher
- Â Butterfly 1 episode, 2004
- Matt Besser
- Â James Besser 1 episode, 2004
- John Barnett
- Â Max Devlin 1 episode, 2004
- Jason Beghe
- Â Henry R. Duke 1 episode, 2004
- Matthew L. Weiss
- Â Matthew 1 episode, 2004
- Chris Fairbanks
- Â Alex 1 episode, 2004
- Robin McDonald
- Â CBS Executive 1 episode, 2004
- Tony Williams
- Â Tony (NBC Executive) 1 episode, 2004
- Ross Brockley
- Â Russ Chockley unknown episodes
- James Frain
- Â Jeremy Pilodes unknown episodes
- Toby Huss
- Â Stewart unknown episodes
- Jennifer Elise Cox
- Â Self unknown episodes
- Michael Hitchcock
- Â Karen's Roommate unknown episodes
- Andy Kindler
- Â Andy Kind unknown episodes
- Eliza Coyle
- Â Daly unknown episodes
- Nitsa Benchetrit
- Â Monique unknown episodes
- Lauren Dombrowski
- Â Karen unknown episodes
- Jeff Rosenthal
- Â Tine unknown episodes
- Ned Goldreyer
- Â NBC Executive unknown episodes
- Ron Kublin
- Â Prison Guard unknown episodes
- Wilandrea Blair
- Â NBC Executive unknown episodes
- George W. Pickett
- Â George unknown episodes
- Janeane Garofalo
- Â Announcer (uncredited) 1 episode, 2004
- John Ennis
- Â Man in Hallway (uncredited) unknown episodes
