The Simpsons (1989– )
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Treehouse of Horror IX 

Homer receives an evil hair transplant, Bart and Lisa get trapped in an Itchy and Scratchy cartoon, and Maggie is revealed to be an alien.


(as Steven 'Demon' Moore)


(created by) (as Rat Groening), (developed by) (as Veins Hell Brooks) | 5 more credits »

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Episode cast overview:
Homer Simpson / Barney / Krusty / Itchy / Poochie / Kodos (voice) (as ?)
Marge Simpson (voice) (as Gloulie Kavner)
Bart Simpson (voice) (as Nancy 'Killer Actor' Cartwright)
Lisa Simpson (voice) (as The Canker)
Moe Szyslak / Snake / Apu / Chief Wiggum / Dr. Nick Riviera / Lou (voice) (as Yank My Area)
Jason Voorhees / Announcer / Kent Brockman / Scratchy / Dr. Hibbert / Kang / Maggie / 'Dracula Got His Groove' Announcer (voice)
Freddy Krueger (voice)
Ed McMahon (voice)
Regis Philbin (voice)
Jerry Springer (voice)
Lady in Audience (voice)


Homer receives an evil hair transplant, Bart and Lisa get trapped in an Itchy and Scratchy cartoon, and Maggie is revealed to be an alien.

Plot Summary | Add Synopsis


Animation | Comedy


TV-14 | See all certifications »




Release Date:

25 October 1998 (USA)  »

Filming Locations:

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
See  »

Did You Know?


In Hell Toupee, David Cohen used his "Scary Treehouse Name" to promote Futurama. If you look at the credits as Snake picks a comb, his name pops up as "David "Watch Futurama" Cohen. See more »


Homer receives a hair transplant from Snake after the latter is executed in the electric chair, which then causes Homer to be possessed with the spirit of Snake. The problem is, before a prisoner is executed in the electric chair, the prisoner's head is shaved, in order to facilitate direct contact between the electrode and the head. See more »


Lady in Audience: Yeah, I got a question for that gross thing, whatever it is.
Jerry Springer: Homer.
Lady in Audience: Nah, the green dude.
See more »


Referenced in The Simpsons: Treehouse of Horror X (1999) See more »

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User Reviews

One of the best episodes of Season 10
18 November 2007 | by (Australia) – See all my reviews

This is not only one of the best episodes of Season 10, but one of the greatest Treehouse of Horror's of all time. It delivers some great jokes, some that are mostly absent from the rest of this season.

This episode is just a breath of fresh air after the last two disappointing efforts (VII, VIII), which were actually quite bad.

But above all else, it's just a clever episode. Quite consistently good. The first two segments were the best, but the third one was still watchable.

If all Season 10 episodes were as good as this, it might just be better than Season 9. If you're a fan of the prime, classic seasons (how couldn't you be?) then I'm quite sure you'll enjoy this episode, if only on a few levels.

10 of 16 people found this review helpful.  Was this review helpful to you?

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