The Simpsons

Smart & Smarter (Season 15, Episode 13)

TV-14

TV Episode | 30 min | Animation, Comedy

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.

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Cast	+ Add Cast
10 cast members

Name	Known for
Dan Castellaneta Homer Simpson / Grampa Simpson / Squeaky-Voiced Teen / Barney Gumble Homer Simpson / Grampa Simpson / Squeaky-Voiced Teen / Barney Gumble See fewer	The Simpsons (1989)
Julie Kavner Marge Simpson (voice) Marge Simpson (voice) See fewer	The Simpsons (1989)
Nancy Cartwright Bart Simpson / Maggie Simpson / Ralph Wiggum / Nelson Muntz (voice) Bart Simpson / Maggie Simpson / Ralph Wiggum / Nelson Muntz (voice) See fewer	The Simpsons (1989)
Yeardley Smith Lisa Simpson (voice) Lisa Simpson (voice) See fewer	The Simpsons (1989)
Hank Azaria Apu / Chief Wiggum / Comic Book Guy / Lou / Moe Szyslak (voice) Apu / Chief Wiggum / Comic Book Guy / Lou / Moe Szyslak (voice) See fewer	The Simpsons (1989)
Harry Shearer Dr. Hibbert / Principal Skinner / 'Bark' Narrator (voice) Dr. Hibbert / Principal Skinner / 'Bark' Narrator (voice) See fewer	The Simpsons (1989)
Simon Cowell Henry (voice) Henry (voice) See fewer	Scary Movie 3 (2003)
Pamela Hayden Milhouse Van Houten (voice) Milhouse Van Houten (voice) See fewer	The Simpsons Movie (2007)
Tress MacNeille Philippa (voice) Philippa (voice) See fewer	Animaniacs (1993)
Karl Wiedergott Additional Voices Additional Voices See fewer	The Simpsons Movie (2007)