- Dan Castellaneta (Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice))
- Julie Kavner (Marge Simpson / Patty Bouvier / Selma Bouvier (voice))
- Nancy Cartwright (Bart Simpson / Nelson Muntz / Ralph Wiggum (voice))
- Yeardley Smith (Lisa Simpson (voice))
- Hank Azaria (Moe Szyslak / Chief Wiggum / Apu / Comic Book Guy / Carl (voice))
- Harry Shearer (Ned Flanders / Mr. Burns / Smithers / Skinner / Lenny (voice))
The Simpsons — S10E22
Episode: They Saved Lisa's Brain
Air Date: 1999-05-09
Runtime: 23 min
Overview
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.