Sinopsis
Nature documentary special where the animals are the well known Simpsons characters. Definitely no penguins.
Pemeran
Dan Castellaneta
Homer Simpson / Kodos / Krusty el Payaso / Sideshow Mel
Julie Kavner
Marge Simpson / Patty Bouvier / Selma Bouvier / Jacqueline Bouvier
Nancy Cartwright
Bart Simpson / Nelson Muntz / Maggie Simpson / Ralph Wiggum / Kearney Zzyzwicz / Rod Flanders / voces adicionales
Yeardley Smith
Lisa Simpson
Hank Azaria
Kirk Van Houten / Moe Szyslak / Comic Book Guy / Gary Chalmers / Snake Jailbird / Professor Frink / Blubbo's Trainer
Harry Shearer
Principal Skinner / Kang / Lenny Leonard / Reverend Lovejoy / Rainier Wolfcastle / Ned Flanders
Hugh Bonneville
Narrador
Pamela Hayden
Milhouse Van Houten / Jimbo Jones / Todd Flanders