S22E04The Simpsons season 22 episode 4: Treehouse of Horror XXI
Aired 7 November 201023 minRated TV-PG
Where to watch The Simpsons Season 22 in Australia
The Simpsons season 22 is streaming in Australia on Disney+ (subscription, listed for the whole show). You can also buy it on Apple TV from $24.99.
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Availability checked 16 November 2026.
What happens in “Treehouse of Horror XXI”
Worried about the effects of violent video games, Marge encourages Bart and Milhouse to play board games; Lisa becomes smitten with a new student, a vampire; while on a second honeymoon, Homer and Marge rescue a castaway who escaped from his ship.
Episode summary: TMDB.
Before you watch
- It is episode 4 of 22 of season 22, so watch episodes 1 to 3 first.
- It runs about 23 minutes.
- Directed by Bob Anderson, written by Joel H. Cohen.
- TMDB users rate it 6.3 out of 10 (32 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
- Bob Anderson
- Writer
- Joel H. Cohen
Credits: TMDB.
More from The Simpsons Season 22
Previous · S22E03MoneyBART10 October 2010
Next · S22E05Lisa Simpson, This Isn't Your Life14 November 2010Every episode of Season 22The 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.