Bart Simpson's Treehouse of Horror #21

Ned Flanders believes he has missed "The Rapture" until he discovers that everyone who has been left behind is left-handed! Then, Apu accidentally receives a shipment of adorable gremlins intended for the sorcery shop a few doors down the block; unfortunately, he doesn't read the warning that tells him not to feed them Squishees after midnight. And visit the "metropolitan" world of Fritz Lang (Simpsons-style), when the idle rich championed by Mr. Burns clash with the working poor led by Marge Simpson.

Characters: Agnes Skinner, Apu Nahasapeemapetilon, Bart Simpson, Bumblebee Man, Carl Carlson, Chief Wiggum, Comic Book Guy, Crazy Old Man, Disco Stu, Doctor Hibbert, Doctor Nick Riviera, Dolph (Simpsons), Fat Tony, Gil (Springfield), Groundskeeper Willie, Herman, Homer Simpson, Jasper Beardley, Kang (Simpsons), Kent Brockman, Kodos, Krusty the Clown, Lenny Leonard, Lisa Simpson, Luigi (Simpsons), Maggie Simpson, Marge Simpson, Martin Prince, Mayor Joe Quimby, Milhouse Van Houten, Mister Burns, Moe Szyslak, Ned Flanders, Nelson Muntz, Otto Mann, Principal Skinner, Professor Frink, Ralph Wiggum, Reverend Lovejoy, Rod Flanders, Sam (Simpsons), Sanjay Nahasapeemapetilon, Snake (Simpsons), Superintendent Chalmers, Todd Flanders, Waylon Smithers, Wendell (Simpsons)