| David Letterman | ... | Himself - Host | |
| Howie Mandel | ... | Himself | |
| Rumer Willis | ... | Herself (credit only) | |
| Dirty Projectors | ... | Themselves - Musical Guest | |
| Paul Shaffer | ... | Himself - Musical Director | |
| rest of cast listed alphabetically: | |||
| Andy Mace | ... | Himself - Owner of Diving Dog 'Brox' | |
| Chris McLeod | ... | Herself - Owner of Diving Dog 'Colby' | |
| Nadja Palenzuela | ... | Herself - Owner of Diving Dog 'Clementine' | |
| Al Chez | ... | Himself - Horn Section Yay-Sayer #2 (uncredited) | |
| Alan Kalter | ... | Himself - Announcer (voice) (uncredited) | |
| Bruce Kapler | ... | Himself - Horn Section Yay-Sayer #3 (uncredited) | |
| Will Lee | ... | Himself - Creepy Screamer (uncredited) | |
| Tom Malone | ... | Himself - Horn Section Yay-Sayer #1 (uncredited) | |
| Episode Crew |
Writing credits(in alphabetical order) | ||
| Matt Goldich | written by (uncredited) | |
Produced by | |||
| Jude Brennan | .... | executive producer (uncredited) | |
| Barbara Gaines | .... | executive producer (uncredited) | |
| Maria Pope | .... | executive producer (uncredited) | |
Other crew | |||
| Erik Akerblom | .... | technical maintenance (uncredited) | |
| Michael Buczkiewicz | .... | talent coordinator (uncredited) | |
| Marc Carusiello | .... | page (uncredited) | |
| Dan Church | .... | page (uncredited) | |
| Kyle Ewert | .... | page (uncredited) | |
| Johnny Dark | ... | World's Oldest Page | |
| Margaret Hall | ... | Lady Who Receives Flowers (uncredited) | |
| Stephanie Birkitt | ... | Herself |
| Main series | Episode guide | Full cast and crew |
| IMDb TV section | IMDb Comedy section | IMDb USA section |