Tom Hanks is the host of this show with a comic approach to raise awareness concerning the environment.
| Actor | Role |
|---|---|
 Tom HanksSelf | Self |
 Jason Alexanderself | self |
 Jack BlackSelf | Self |
 Cedric the EntertainerSelf | Self |
 Larry DavidSelf | Self |
 Leonardo DiCaprioSelf | Self |
 Will FerrellGeorge W. Bush | George W. Bush |
 Faith HillSelf | Self |
 Dustin HoffmanSelf | Self |
 Richard JenkinsSelf | Self |
 Jenifer LewisSelf | Self |
 Julia Louis-DreyfusSelf | Self |
 Bill MaherSelf | Self |
 Steve MartinSelf | Self |
 Tim McGrawSelf | Self |
 Virginia NewcombSelf | Self |
 Kevin SateriSelf | Self |
| MMatthew ShafferSelf | Self |
 Ben StillerSelf | Self |
 Wanda SykesSelf | Self |
| WWilliam WessleySelf | Self |
 Robin WilliamsSelf | Self |
| MMeeghan HenryChild (uncredited) | Child (uncredited) |
 Jim LovellSelf | Self |
 Eric IdleSelf | Self |
| CCohl KlopGlobal Warming Protector | Global Warming Protector |
 Robert SmigelTriumph the Insult Comic Dog | Triumph the Insult Comic Dog |
 Martin ShortNathan Thurm | Nathan Thurm |
 Robert F. Kennedy Jr.Self | Self |
 Conan O'BrienSelf | Self |