S10E22The Simpsons season 10 episode 22: They Saved Lisa's Brain
Aired 9 May 199923 minRated TV-PG
Where to watch The Simpsons Season 10 in Australia
The Simpsons season 10 is streaming in Australia on Disney+ (subscription, listed for the whole show). You can also buy it on Apple TV from $3.49.
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Availability checked 16 November 2026.
What happens in “They Saved Lisa's Brain”
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.
Episode summary: TMDB.
Before you watch
- It is episode 22 of 23 of season 10, so watch episodes 1 to 21 first.
- It runs about 23 minutes.
- Directed by Pete Michels, written by Matt Selman.
- TMDB users rate it 6.9 out of 10 (34 votes).
The Simpsons trailer
The official trailer for the series (no preview of this episode has been published).
Play video: The Simpsons trailer
Cast and crew of this episode
- Director
- Pete Michels
- Writer
- Matt Selman
- Guest stars
- Stephen Hawking as Stephen Hawking (voice)
Credits: TMDB.
More from The Simpsons Season 10
Every episode of Season 10The Simpsons episode guide
Episode names, air dates, runtimes, stills and ratings: TMDB. Air dates are the first broadcast anywhere; where it streams is our daily Australian check.