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"Trilogy of Error" is the eighteenth episode of the twelfth season of the American animated television series The Simpsons, and the 266th episode overall. It originally aired on the Fox network in the United States on April 29, 2001. In the episode, Homer's rush to the hospital to re-attach his severed thumb, Lisa's rush to school to win the science fair, and Bart's run-in with an illegal fireworks scheme are interconnected as each act tells the events of the same day, but from a different point of view.