A popular Simpsons fan theory that many of Springfield's residents are all clones is actually true, and it was confirmed in a story written by none other than Luke Skywalker himself, Mark Hamill. The Simpsons premiered on Fox in December 1989 and has been going strong ever since. The show is currently on its 34th season and has been adapted into other forms of media like movies, video games, and comic books. Hamill has appeared as a guest star on the show, voicing both himself and the character Leavelle in the season 10 episode «Mayored to the Mob.»
The theory that the characters are clones has been going for a long time now. It's supported by look-alike characters like Bart and Lisa's rivals Lester and Eliza, the fact that flashbacks are inconsistent, and the constant return of dead characters, as is the case with Hans Moleman. Hans is a minor background character who constantly gets killed off or seriously injured, but always shows up again unharmed and very much alive. There's no doubt that he's a clone, but why would there be multiple Hans Molemans? Luckily, a 2001 Simpsons comic has the answer.
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The story «Catastrophe in Substitute Springfields!» appears in Bart Simpson's Treehouse of Horror #7. In this short comic story written by Hamill with art by Bill Morrison, Professor Frink and Comic Book Guy invent a cloning machine that eventually ends up in the hands (tentacles?) of the aliens Kang and Kodos. They use it to create a «ship in a bottle» version of Springfield to serve as their intergalactic petting zoo for indefinite study, whose residents are more humanoid versions of the series' colorful cast of characters. This Treehouse of Horror short
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