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From (season 8 Episode 1) "Treehouse of Horror VII"
A Halloween special which is divided into three short stories:
The Thing and I – Bart discovers he has an evil twin, who is living in the Simpsons' attic.
The Genesis Tub – After intending to prove that sugary drinks will rot teeth, Lisa creates her own miniature universe.
Citizen Kang – Kang and Kodos impersonate presidential candidates Bill Clinton and Bob Dole in order to invade Earth.
Guest star: Phil Hartman