The Simpsons (1989– )
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Lisa the Simpson 

Lisa fears she is losing her intelligence when she learns about the fabled Simpson gene. Meanwhile, Jasper freezes himself in the Kwik-E-Mart freezer.


Susie Dietter


Matt Groening (created by), James L. Brooks (developed by) | 3 more credits »


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Episode cast overview:
Dan Castellaneta ... Homer Simpson / Grampa Simpson / Kenny / Man at Jazz Hole / Rich Texan / Male Simpson Relatives (voice)
Julie Kavner ... Marge Simpson (voice)
Nancy Cartwright ... Bart Simpson / Nelson Muntz / Ralph Wiggum / Billy (voice)
Yeardley Smith ... Lisa Simpson (voice)
Hank Azaria ... Apu Nahasapeemapetilon / Dr. Nick Riviera / Chief Wiggum / 'When Buildings Collapse' Narrator / Technician (voice)
Harry Shearer ... Principal Skinner / Jasper / Dr. Hibbert / FOX Announcer / Channel 6 Announcer / Otto / Station Manager / Kent Brockman (voice)
Phil Hartman ... Troy McClure (voice)
Pamela Hayden ... Milhouse Van Houten / Jimbo Jones (voice)
Tress MacNeille ... Violinist / Dr. Simpson / Environmental Lawyer Simpson (voice)
Maggie Roswell ... Miss Hoover / Architect Simpson / Sales Coordinator Simpson (voice)
Russi Taylor ... Martin Prince (voice)


Lisa fears she is losing her intelligence when she learns about the fabled Simpson gene. Meanwhile, Jasper freezes himself in the Kwik-E-Mart freezer.

Plot Summary | Plot Synopsis

Plot Keywords:

2d animation | See All (1) »


Animation | Comedy


TV-PG | See all certifications »






Release Date:

8 March 1998 (USA) See more »

Filming Locations:


Company Credits

Show more on IMDbPro »

Technical Specs

Sound Mix:

Dolby | Dolby SR (seasons 3-19)



Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


Before the film ends, the boy asks Troy what DNA stands for, and but Troy has no idea. DNA stands for deoxyribonucleic acid. See more »


Homer Simpson: I rounded up every Simpson in the tri-city area so I can prove to you there's nothing wrong with the Simpson genes. This is your great uncle Chet. Go ahead, Chet, tell her what you do.
Great Uncle Chet: I run an unsuccessful shrimp company.
Homer Simpson: [nervously] Oh... but you *run* it, right?
Great Uncle Chet: [smugly] Oh, yeah.
Homer Simpson: Okay... uh, this is your second cousin, Stanley!
Cousin Stanley: Um, I shoot birds at the airport.
Homer Simpson: [More nervously] Everybody hates birds, right?
See more »

Crazy Credits

The episode has a 1997 copyright date, despite airing in 1998. This is presumably due to the fact it was a holdover episode with Bill Oakley and Josh Weinstein as show-runners, who by 1998 had already left The Simpsons to work on Mission Hill. See more »


References 2001: A Space Odyssey (1968) See more »


1812 Overture
Composed by Pyotr Ilyich Tchaikovsky
See more »

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User Reviews

Slow, Different Episode,
9 September 2015 | by lesleyharris30See all my reviews

Lisa the Simpson is a great Simpsons episode with a well written storyline and plenty of very funny moments. It's a very slow episode that is very dialogue based and dosen't rely a whole lot on story, but more so on characters, and the performances of the voice actors are very important here, thankfully they all did a great job. It's definitely a weaker episode in the ninth season, with very exciting episodes like the City of New York vs Homer Simpson and Trash of the Titans, this one dosen't deliver as much entertainment or high energy as they do. The scene towards the end in which we are introduced to several new Simpsons family members is outstanding, it's a ton of fun and the best few minutes of this episode, all of the once off characters are hilarious and I would have no problem with seeing them again some day. While it's definitely not as interesting as other parts of the ninth season, Lisa the Simpson is still an enjoyable Simpsons episode.

Lisa fears she is losing her intelligence when Grampa informs her on the family's history with school grades.

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