It's the last day of Camp Firewood's season, but there's still time for the big talent show, a little romance… and for everyone to be wiped out by the piece of NASA's Skylab that's hurtling toward Earth.
| Actor | Role |
|---|---|
 Janeane GarofaloBeth | Beth |
 David Hyde PierceHenry | Henry |
 Michael ShowalterCoop / Alan Shemper | Coop / Alan Shemper |
 Marguerite MoreauKatie | Katie |
 Paul RuddAndy | Andy |
 Zak OrthJ.J. | J.J. |
 Christopher MeloniGene | Gene |
 A.D. MilesGary | Gary |
 Molly ShannonGail | Gail |
 Gideon JacobsAaron | Aaron |
 Ken MarinoVictor | Victor |
 Joe Lo TruglioNeil | Neil |
 Michael Ian BlackMcKinley | McKinley |
| LLiam NortonArty | Arty |
 Amy PoehlerSusie | Susie |
 Bradley CooperBen | Ben |
 Marisa RyanAbby | Abby |
 Elizabeth BanksLindsay | Lindsay |
 Gabriel MillmanCaped Boy | Caped Boy |
 Kevin SussmanSteve | Steve |
| KKevin Thomas ConroyMork Guy | Mork Guy |
| CChristopher CusumanoMedieval Kid | Medieval Kid |
 Cassidy LaddenMallrat Girl | Mallrat Girl |
 Madeline BlueCure Girl | Cure Girl |
 Nina HellmanNancy | Nancy |
 Peter SalettGuitar Dude | Guitar Dude |
 Judah FriedlanderRon | Ron |
| JJacob Shoesmith FoxMoose | Moose |
 Whitney VanceValerie | Valerie |
| BBenjamin CoppolaBobby | Bobby |