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The Simpsons Season 21 Episode 22

Bart becomes convinced that his new neighbor, Walt, is his archenemy, Sideshow Bob, disguised and back for revenge. But when Marge tries to convince Bart otherwise by taking him to visit the state penitentiary, a disturbing truth is revealed.

Serie: The Simpsons

Episode Title: The Bob Next Door

Air Date: 2010-05-16