"Treehouse of Horror XX" is the twentieth Halloween episode of The Simpsons, first aired on October 18, 2009 on FOX. It is the first "Treehouse of Horror" episode to air in HD, and also the first "Treehouse of Horror" episode since 1999's "Treehouse of Horror X" to actually premiere in time for Halloween.



Traditional horror movie characters such as Frankenstein's Monster, the Mummy, the Wolf Man, and Dracula roam the streets of Springfield on Halloween night. After they are teased by Dolph, Jimbo, and Kearney, they get new, more modern costumes from a Halloween store, with Frankenstein's monster as SpongeBob SquarePants, Dracula as Iron Man, The Wolf Man as Harry Potter and The Mummy as Captain Jack Sparrow. They then go to an adult Halloween party thrown by Homer and Marge, but are soon confronted by their wives, who are angry that their husbands lied about going to kill children. Homer tries to intervene as the wives begin to assault their husbands, only to be decapitated.

Dial 'M' for Murder or Press '#' to Return to Main MenuEdit

In this black and white segment, Lisa wants revenge after being sent to detention by Ms. Hoover for disrupting class as she claims another student topped her through a tutor. Bart hatches a "criss-cross" plan and tells Lisa that if she pulls a "ding-dong ditch" on Mrs. Krabappel, he will do the same to Ms. Hoover. Lisa thinks this means ringing the bell at Mrs. Krabappel's apartment and leaving. However, Lisa soon learns that Bart meant for her to kill Mrs. Krabappel (and dump the corpse in a ditch), as he has killed Ms. Hoover. Bart attempts to coax Lisa into killing Mrs. Krabappel with a paper cutter, but she refuses. Eventually, Bart decides to blackmail her into it with help from Groundskeeper Willie, who would frame Lisa for the decapitated Skinner to honor his side of the "criss-cross" in which Bart killed Skinner. Realizing that Bart would frame her for these incidents, Lisa tricks him into belief that she was submitting at his will only to get a knife from his hands and attempts to kill Bart in self-defense, beginning a chase sequence. Bart finally finds shelter at a crowded playground carousel, but is left at Lisa's mercy when the other children leave to get ice cream. Lisa, however, recognizing that she would not be better than Bart, says she will never be a murderer, and attempts to throw the knife away. The knife cycles out of control and ends up nailing Bart in the head just as Mrs. Krabappel appears, pleased at his death. Despite her shock for accidentally killed Bart, Lisa agrees that it's better this way and she and Krabappel walk away smiling, leaving the murdered Bart to spin around on the carousel.

Don't Have a Cow, MankindEdit

Krusty the Clown introduces a new version of his Krusty Burger, the Burger2, made from cattle that have eaten other cattle in their feed. Upon eating a burger on live television, Kent Brockman begins to comment on the taste before turning, gray, red-eyed, and cannibalistic, starting a chain reaction of people getting eaten. Twenty-eight days later, Springfield has become overrun by a zombies (again and for the third time, not counting a Halloween-themed couch gag) -- only this time, they're referred to as "munchers." The Simpsons are established to be one of the few survivors.

One day, Bart, tired of eating fruit, so he escapes from his family's barricaded house and eats one of the burgers, but turns out to be immune to its effects. Over the phone, a besieged Dr. Hibbert (who is fighting back quite well until the end of the phone call) tells them that Bart's immunity may be the key to developing a cure to the epidemic, a genetic "chosen one", and that they must bring Bart to a so-called "safe zone" outside the city. The Simpsons are attacked by the munchers after a failed attempt to sneak out. They are saved by Apu (after Rainier Wolfcastle failed his attempt at being the Simpsons' savior (Come with me if you want to live!) and got eaten almost immediately after his entrance), driving an armored off-road truck. Apu explains that he was never infected because, as a vegan and a Hindu, he is morally opposed to eating anything that was once an animal, and, as a convenience store clerk, he's "armed to the teeth" in case of a store robbery or a zombie apocalypse.

The group tries to leave Springfield, but Apu winds up crashing the truck on top of a pile of smashed cars. Apu goes to push the car off the pile, but the Simpsons drive away thinking Apu sacrificed himself, when he actually wanted the Simpsons to wait for him. After Apu gets killed, the Simpsons drive on but run out of gas, walking the rest of the way to the safe zone. During their journey, Homer is bitten by a muncher Mr. Burns after picking off his nose, thinking he was dead, thus turning him into a muncher himself. The family decide not to kill him in the hopes of finding a cure. They reach the safe zone, where Bart – being immune to the muncher virus – is worshiped as the "chosen one". However, the people there believe that cannibalizing Bart will save them from the virus. The Simpsons, however, think of another solution: vaccinating the remaining populace (including Ralph Wiggum) by having Bart bathe in their food before eating it.

There's No Business Like Moe BusinessEdit

In a segment presented like a Broadway musical, Moe Szyslak is lonely and upset that he does not have a girlfriend and is jealous when he sees Homer and Marge together. When Homer falls into the basement of the bar and is impaled by the microbrew pipes, his blood becomes the secret ingredient in Moe's new beer. Everyone loves this new beer, saying that it makes them feel warm, secure and cozy on the inside. Moe uses this to his advantage and woos Marge, (Moe, it tastes like coffee mixed with rainbow!) tricking her into thinking that Homer came out of the closet as a homosexual and left Marge, when in reality, Homer is slowly dying from losing blood. Homer emerges, alive, despite being impaled by Moe's microbrew machine, hurls a dummy of Moe across the room, and reunites with Marge. The special ends with the whole audience (except Kang and Kodos) gathering onstage to sing a song.


  • This is the first Treehouse of Horror episode since "Treehouse of Horror X" to air in October.
  • The segment, "Don't Have a Cow Mankind", is the third time Springfield has been over run by zombies (the first two being Treehouse of Horror III and Treehouse of Horror XIII).
  • Even after turning into a Muncher, Homer is never seen trying to attack his family.
  • At the end of the second segment, Homer still hasn't been changed back to normal (Bart probably wanted Homer to stay that way.)
  • The ending song is the first time the main theme has been used for a song sung by the Simpsons
  • Due to the entire first segment being black and white (including the scary name credits near the beginning), The closing credits are the same and white text, Therefore this is the only Treehouse of Horror episode to not use green closing credits.


Voice actor Character
Dan Castellaneta Homer Simpson
Count Dracula
Groundskeeper Willie
Squeaky Voiced Teen
Mr. Teeny
Barney Gumble
Grampa Simpson
Julie Kavner Marge Simpson
Selma Bouvier
Nancy Cartwright Bart Simpson
Ralph Wiggum
Todd Flanders
Dracula's Wife
Yeardley Smith Lisa Simpson
Hank Azaria Moe Szyslak
Carl Carlson
Window Pane Man
Eye-patch Man
Harry Shearer Frankenstein's Monster
Principal Skinner
Kent Brockman
Lenny Leonard
Dr. Hibbert
Rainier Wolfcastle
Reverend Lovejoy
Marcia Wallace Edna Krabappel
Jimbo Jones
Dracula's Wife
Rod Flanders
Tress MacNeille Dolph
Agnes Skinner
Mrs. Muntz
The Mummy's Wife
Maggie Roswell Wolfman's Wife
Miss Hoover
Helen Lovejoy
Karl Wiedergott Zombie Nurse
The Simpsons Treehouse of Horror


See also: Halloween of Horror