Duration: 22m

TV-PG 7.1 Animation / Comedy

The Simpsons S15E13

When Maggie is revealed to have an IQ of 167, Lisa is no longer the genius of the family, causing a rivalry between the sisters.

Release Date: February 22, 2004 (USA)

Creator: Matt Groening

Cast: Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria, Harry Shearer, Pamela Hayden, Tress MacNeille, Marcia Wallace