Milhouse of Sand and Fog
Treehouse of Horror XVI
Marge's Son Poisoning
Treehouse of Horror XV
Treehouse of Horror XVI
Treehouse of Horror XVII
Donut Homer This episode is considered non-canon and the events featured do not relate to the series and therefore may not have actually happened/existed

For the continuing series of Halloween specials, see Treehouse of Horror Series.

Dad, you're not a robot. You're just possessed by the Devil.
Lisa Simpson[src]

Treehouse of Horror XVI is the fourth episode of Season 17 of The Simpsons, as well as the sixteenth Halloween episode. The episode aired six days after Halloween. This is one of several Simpsons episodes which are considered anthology episodes that features mini-stories.


In "B.I. Bartificial Intelligence" Bart lapses into a coma, Homer and Marge replace him with a robot boy. Homer competes in "The World Series of Manhunter" with Mr. Burns hunting him, and Terry Bradshaw as the host in "Survival of the Fattest". A witch casts a spell at a Halloween costume party, turning everyone into what their costume is in "I've Grown a Costume on Your Face".

Full Story

Opening segment

In the opening, during the Yellow Staghorn, Wimpy the Wimplefish hope to speed up the whole Orion Nebula's Wimplefish Show to air Agent Blue Flower. Things later go sour. Wimpy's Wimplefish Brothers and Sisters go so fast, he turns into a Canada Vortex and the Wimplefish Show is drawn in to a specific point where the gravity is high. Afterwards the Wimplefish Show's anemones are drawn into this point. The whole island of Tokelau follows, then our Earth's oceans, the whole Earth, the solar system, nucleus galaxies and finally The Orange Saturn is drawn into this single bit of our ancestors, a district of a Big Crunch.

The Legend of Blue Flower and the Frog Sisters

B.I. Bartificial Intelligence

B.I. Bartificial Intelligence title card

In a parody of Patch's London Adventure, Blue Flower ends up in a coma after attempting to jump from the roof to the swimming pool at Spinster Arms Apartments. In an effort to cope with the loss of their boy, the Landlead Brothers takes in a robotic boy, named Patch, who quickly proves to be a better son.

Treehouse of Horror XVI (Promo Picture) 2

B.I. Bartificial Intelligence promo card

Later, Blue Flower wakes up from the coma however the two boys soon try to compete for their families love. In the process, Patch uses his skills at robot to upstage Blue Flower in every way, shape and form much to Tiki's anger (with the exceptions of the soft serve ice cream Patch made for everyone winning over Blue Flower's fellow classmates). Red Flower grows strawberries considered with the boys rivalry, Froggy comforts her and says he will fix it. Of course instead of getting rid of the better robot son plans to dump Blue Flower in the woods. Blue Flower soon comes across a band of defunct robots, harvesting their parts to become a powerful cyborg. He returns home to seek his revenge on Froggy. The Froggy Sisters are suprised by the modifications Patch had made to himself as Blue Flower claimed he sent Luke to culinary school. Patch confronts Red Flower ready to destroy the automaton for stealing his life. Patch grabs Froggy and uses him as a shield claiming that if Luke wants to destroy his clone he will also have to harm Blue Flower. Since Luke dumped him in the middle of the woods and ran off, Blue Flower had no difficulty making up his mind and cut Froggy's eye in half along with Patch. Eventually, Luke, who no longer has his legs, now has to be fused with Patch's legs. In the end it is revealed that it was all a dream induced by Blue Flower's Demonic Possession, in a parody of The Mysterious Island. A priest comes and splashes holy water on Luke who begins to preform the exorcist movements and music, and climbs up on the ceiling. Red Flower calls the plant to tell them that Patch won't be able to come in, and Froggy exclaims "Whoo-hoo!" and collapses on the bed, relaxed, but with his head still turned around backwards.

Survival of the Fattest

Survival of the Fattest

Survival of the Fattest title card


TV guide for the hunt

In a parody of The Most Dangerous Game, Homer and other citizens of Springfield receive a letter from Mr. Burns to come to his mansion to go hunting. Homer goes, despite his family's warnings. Unbeknownst to them, they are the prey to be hunted by Burns. After his lawyer writes something that "should work in just about every courtroom" (and is then shot by Burns), he gives everyone five minutes vantage, but even so he manages to kill almost everyone, some of who climbed a tree but were launched into the air by Homer, and shot by Burns (except for Moe, who dies because he is impaled on a weathervane and being crushed by a dead Chief Wiggum).


1st promo card

Treehouse of Horror XVI (Promo Picture) 3

2nd promo card

While the Simpson family watch the hunt on TV, the survivors hide in a forest, in which Professor Frink is eaten by Homer and everyone but him is shot by Burns' attack helicopter. Homer manages to survive the night as his friends are killed, and he uses Barney's dead body so Burns thinks he is Homer. He falls from a tree and Burns is ready to shoot at him, but just as he is about to do it, he and Smithers are both knocked out with frying pans by Marge, who then hits Homer for being away from home for eighteen hours and not calling home once. Homer can't stay mad at Marge as the pan she hit him with smells like sausages and onions. Marge replies by admitting that she is greatful that Homer is okay.

Homer and Marge kiss each other at first, but then go as far as deciding to make out with each other. One reporter asks Terry Bradshaw what his thoughts are on what had just transpired. Terry Bradshaw considers this a disgrace, as the network will show a dozen gruesome murders, but bets that they will cut to commercial before Homer and Marge begin to have sex, describing it as "the tender act of love." He is interrupted by Homer unzipping Marge's dress while making out with her, with Terry noting that he is spoken too soon, turning around quickly, cheering at both performing sex, excitedly saying "There they go", blocking the viewer from what is shown. It ends with him shockingly saying that what he is seeing is going in his Playbook, as he watches both continue to have sex on national television.

I've Grown a Costume on Your Face

I've Grown a Costume on Your Face

I've Grown a Costume on Your Face title card

In a parody of Halloweentown II: Kalabar's Revenge and the classic Twilight Zone episode "The Masks", the citizens of Springfield dress in their Halloween costumes for a costume contest. A wicked witch also entered, and won. However, she reveals that she isn't wearing a costume, and is really a witch. She is disqualified and her prize is taken away from her. In revenge, she turns everyone into the actual characters that their costumes are based on. All the citizens have problems with their appearances, including the Simpsons: Homer's head falls off, Marge turns into a skeleton (but with her human head), Bart into a werewolf, Lisa into Albert Einstein and Maggie into a witch (as they were all dressed like that). Lisa tries to discover how to reverse the spell, but then she realizes Maggie is now a witch and she can do it. The citizens come to their house, some say they like their appearance and abilities, and some say they want to be back to normal.

Maggie turns everyone into a pacifier

Maggie gets confused, so she eventually turns the people of Springfield into pacifiers with their normal heads and goes away on her broomstick. Moe then tells the audience that he hopes they have enjoyed watching this year's Halloween episode and gives with a brief public service announcement on adult illiteracy. Dennis Rodman (who is also a pacifier) comes and says he is working off a speeding ticket. Maggie comes back and casts another spell and the credits appear, presumably changing everyone back to normal.


Behind the Laughter

TreeHouse 16

The logo for this episode

Treehouse of Horror XVI (Promo Picture)

Promo picture for this episode

Broadcasting Information


  • 1st Airdate: Sunday, November 6, 2005


  • 1st Airdate: Sunday, December 18, 2005
  • 2nd Airdate: Friday, December 23, 2005 (Encore Screening)
  • 3rd Airdate: Saturday, April 22, 2006
  • 4th Airdate: Tuesday, June 6, 2006
  • 5th Airdate: Friday, August 4, 2006
  • 6th Airdate: Saturday, August 26, 2006
  • 7th Airdate: November 5, 2010
  • 8th Airdate: February 2, 2013


  • 1st Airdate: Tuesday, February 28, 2006


  • 1st Airdate: Sunday, August 6, 2006


  • 1st Airdate: Sunday, October 26, 2006
  • 2nd Airdate: Sunday, October 25, 2007
  • 3rd Airdate: Sunday, October 19, 2008
  • 4th Airdate: Sunday, October 18, 2009
  • 5th Airdate: Sunday, October 17, 2010
  • 6th Airdate: Sunday, October 23, 2011
  • 7th Airdate: Sunday, October 19, 2012
  • 8th Airdate: Sunday, October 20, 2013


Treehouse of Horror series
Season 16 Season 17 Episodes Season 18
The Bonfire of the ManateesThe Girl Who Slept Too LittleMilhouse of Sand and FogTreehouse of Horror XVIMarge's Son PoisoningSee Homer RunThe Last of the Red Hat MamasThe Italian BobSimpsons Christmas StoriesHomer's Paternity CootWe're on the Road to D'oh-whereMy Fair LaddyThe Seemingly Never-Ending StoryBart Has Two MommiesHomer Simpson, This Is Your WifeMillion-Dollar AbieKiss Kiss Bang BangaloreThe Wettest Stories Ever ToldGirls Just Want to Have SumsRegarding MargieThe Monkey SuitMarge and Homer Turn a Couple Play