S12E01The Simpsons season 12 episode 1: Treehouse of Horror XI
Aired 1 November 200023 minRated TV-PG
Where to watch The Simpsons Season 12 in Australia
The Simpsons season 12 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 “Treehouse of Horror XI”
This year's Halloween story sees The Simpsons as "The Munsters" (with everyone except Lisa getting killed), Homer as a wandering spirit on the hunt for a good deed in "G-G-Ghost D-D-Dad," Bart and Lisa as peasants in a fairy tale forest in "Scary Tales Can Come True," and Lisa inadvertently dooming mankind by rescuing a dolphin in "Night of the Dolphin."
Episode summary: TMDB.
Before you watch
- It is the season premiere of season 12.
- It runs about 23 minutes.
- Directed by Matthew Nastuk, written by Rob LaZebnik, Don Payne, Carolyn Omine and John Frink.
- TMDB users rate it 7.1 out of 10 (33 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
- Matthew Nastuk
- Writers
- Rob LaZebnikDon PayneCarolyn OmineJohn Frink
- Guest stars
- Marcia Wallace as Edna Krabappel (voice)
Credits: TMDB.
More from The Simpsons Season 12
Every episode of Season 12The 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.