The Simpsons (1989– )
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Smart & Smarter 

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.


Steven Dean Moore


Matt Groening (created by), James L. Brooks (developed by) | 4 more credits »


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Episode cast overview:
Dan Castellaneta ... Homer Simpson / Grampa Simpson / Squeaky-Voiced Teen / Barney Gumble (voice)
Julie Kavner ... Marge Simpson (voice)
Nancy Cartwright ... Bart Simpson / Maggie Simpson / Ralph Wiggum / Nelson Muntz (voice)
Yeardley Smith ... Lisa Simpson (voice)
Hank Azaria ... Apu / Chief Wiggum / Comic Book Guy / Lou / Moe Szyslak (voice)
Harry Shearer ... Dr. Hibbert / Principal Skinner / 'Bark' Narrator (voice)
Simon Cowell ... Henry (voice)
Pamela Hayden ... Milhouse Van Houten (voice)
Tress MacNeille ... Philippa (voice)
Karl Wiedergott Karl Wiedergott ... Additional Voices (voice)


After a quarrel with Dr. Hibbert, Homer decides to enlist Maggie for a pre-nursery school. Maggie doesn't get tested because she can't talk. Back home Lisa discovers Maggie can make words and the family goes back to the pre-nursery school. This time Maggie passes the test gloriously and turns out to have an IQ of 167. This is more than Lisa's IQ (159) which makes her unsure about her identity. Written by Marco van Hoof <>

Plot Summary | Add Synopsis

Plot Keywords:

2d animation | child prodigy | See All (2) »


Animation | Comedy


TV-PG | See all certifications »






Release Date:

22 February 2004 (USA) See more »

Filming Locations:


Company Credits

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Technical Specs


Sound Mix:

Dolby | Dolby SR (seasons 3-19)



Aspect Ratio:

1.33 : 1
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Did You Know?


The title is based off the film "Dumb and Dumber". See more »


The tongue in the giant model digestive system is divided into different areas for different tastes. This is inaccurate; the various taste receptors are spread all over the tongue. See more »


Henry: Meet Maggie Simpson; IQ 165
Mrs Wickerbottom: 165? That's amazing for a Christian!
See more »

Crazy Credits

Simon Cowell comments and criticizes on the credits. See more »


References Dumb and Dumber (1994) See more »


Who's That Girl?
Written by Annie Lennox and David A. Stewart
Performed by Eurythmics
See more »

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User Reviews

A Simple, Fun Episode,
3 November 2016 | by lesleyharris30See all my reviews

Smart & Smarter is a great Simpsons episode with a well written plot and plenty of very funny scenes. It's an enjoyable episode as we focus on Lisa and Maggie's relationship, something that we see seldom on the show, as Lisa struggles with the possibility that Maggie may be more intelligent than she is. Normally Lisa episodes are quite weak, but I found this one Intriguing as we see the character feeling truly lost, and we gain more sympathy for her than we would in episodes where she is trying to save the environment or becoming a vegetarian.

I did feel, however, that the plot does not go as deep as it should have, as if the writers were holding back. We should have seen Maggie achieving in her genius more, while Lisa stumbles far more, the most we ever see of Maggie doing well is with her teachers, we never get a proper showcase.

Simon Cowell adds an extra boost and spirit to the episode, serving as a parody of his own judging background by criticising the intelligence of young children. The highlight for me was the closing credits, as he judges the cast and crew of the Simpsons.

It is a sweet, different show as we get a closer look at the bond between Lisa and Maggie's bond, which is what I mainly took away. Funny and heartwarming, Smart & Smarter is a very enjoyable Simpsons.

Lisa enters a crisis when she discovers she may no longer be the smartest member of the family.

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