“The Thing and I”: Bart and Lisa hear strange noises emanating from the attic and decide to investigate. Upstairs, the children discover an empty cage with steel bars. Later, Homer and Marge admit that Bart has an evil Siamese twin brother named Hugo. Everyone, except Bart, races out of the house to search for the missing twin. Bart realizes too late that Hugo is still inside the house. Armed with a steak knife, Hugo describes his hideous plan to surgically reconnect Bart to his side. In the nick of time, Dr. Hibbert appears and cold cocks Hugo. Hibbert notices that Hugo’s surgical scar is on the wrong side of his body... meaning that it is Bart, and not Hugo, who is actually the incarnation of evil.

“The Genesis Tub”?: Lisa uses a baby tooth that fell out her mouth to conduct a science fair project. She places the tooth inside a margarine tub and then pours soda over it. The next morning, Lisa examines the tooth with a microscope, and discovers evidence of a tiny society. Bart mistakes the culture for a miniature model and crushes a building with his finger. That night, the tiny world deploys space ships that attack Bart in his bed. Later, a series of energy rings shrinks Lisa to microscopic size. The tiny townspeople mistake Lisa for God, and question her about “the Dark One.” Lisa explains that Bart is her brother. Later, Bart steals the margarine tub from his sister’s room and wins the science fair for “his” miniature universe.

“Citizen Kang”: Homer is interogated by aliens Kang and Kodos about the identity of Earth’s leaders. Homer identifies Bill Clinton as our president, but cautions that Bob Dole might replace him if he wins the election. The aliens kidnap both men, place them in suspended animation, and then morph into their exact duplicates. Homer interrupts a political debate between both alien “candidates,” hoping to expose their sinister plan. But secret service men quickly whisk him away. As a last resort, Homer rushes the candidates and rips off their skin, exposing Kang and Kodos. But the aliens insist that a two-party system insures that one of them will win election.