They Saved Lisa's Brain
Mayor Quimby flees Springfield, leaving the town chapter of Mensa in charge. As the group's new power goes to their heads, they take their utopian plans too far and the townspeople revolt.
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More from this season
S10 E1
Lard of the Dance
Homer and Bart try to make money by selling used grease. Meanwhile, Lisa organizes a school dance but feels alienated when a new classmate and her friends try to act like adults.
S10 E2
The Wizard of Evergreen Terrace
A midlife crisis prompts Homer to quit his job and become an inventor.
S10 E3
Bart the Mother
Under Nelson's bad influence, Bart shoots a bird with a BB gun. Stricken with remorse, he tries to nurture the eggs from the bird's nest, which hatch into a species of lizard outlawed in Springfield.
S10 E4
Treehouse of Horror IX
In "Hell Toupée," Snake is sent to the electric chair, and his hair is transplanted onto Homer. In "The Terror of Tiny Toon," Bart and Lisa become cartoon characters in an episode of Itchy & Scratchy. In "Starship Poopers," a growth spurt casts doubt on Maggie's paternity, and the family goes on the Jerry Springer show.