Treehouse of Horror ("skräckens koja") är det avsnitt av TV-serien Simpsons som varje år visas runt Halloween sedan den andra säsongen. Varje avsnitt består av tre korta berättelser där familjen Simpson medverkar i, eller personer som efterliknar dem i utseende och röster. Under de första säsongerna gick avsnittet under namnet "The Simpsons Halloween Special".
Treehouse of Horror är också en serietidning utgiven av Bongo Comics i USA som till 2007 gick under namnet "Bart Simpson's Treehouse of Horror". Ett antal historier ur serietidningarna finns samalade i Treehouse of Horror Reprint som även delvis innehåller nytt material.
Avsnitten utspelar sig utanför seriens normala handling och förändrar inte seriens ordinarie historia eller handling. Första avsnittet sändes på tv-kanalen Fox den 25 oktober 1990 under namnet ”The Simpsons Halloween Special.
Vinjetten skiljer sig också från originalet och delar av namnet på creditlistan är förändrade till mer "skrämmande". Vissa av avsnitten har haft en hög åldersgräns i en del länder. Temat i avsnitten är ofta parodier på nuvarande händelser i USA och filmer, romaner, pjäser samt TV-program.
The Simpsons: Night of the Living Treehouse of Horror är ett plattformsspel utvecklat av Software Creations för THQ till Game Boy Color som utspelar sig i avsnitten.
Avsnitt TV-avsnitt Nr Säsong Avsnitt Prod. kod Sändes på FOX Titel Författare RegissörI216 - 2037F0425 oktober 1990 "Bad Dream House" John Swartzwelder Wes Archer "Hungry are the Damned" Jay KogenWallace Wolodarsky Rich Moore "The Raven" Sam SimonEdgar Allan Poe David SilvermanII342 - 3078F02 31 oktober 1991 "Lisa's Nightmare"Attrocious Al JeanMorbid Mike ReissJittery Jeff Martin Gasping George MeyerSlithering Sam SimonSpooky John Swartzwelder Jim Rondo Reardon "Bart's Nightmare" "Homer's Nightmare"III 4 64 - 405 9F04 29 oktober 1992 "Clown Without Pity" Attrocious Al JeanMorbid Mike ReissJohnny Katastrophe KogenWarped Wally WolodarskyScarifying Sam SimonVicious Jack Vitti Bloodcurdling Carlos Baeza "King Homer" "Dial 'Z' For Zombies"<big>IV | rowspan=4 style="text-align: center;" | 5 | rowspan=4| 86 - 505 | rowspan=4| 1F04 | rowspan=4| 28 oktober 1993 | "Wraparounds" | Watch Conan O'Brien | rowspan=4| David "Dry Bones" Silverman |- | "The Devil and Homer Simpson" | Greg "It's Alive!" DanielsDisfigured Dan McGrath |- | "Terror at 5½ Feet" | The Late Bill OakleyThe Estate of Josh Weinstein |- | "Bart Simpson's Dracula" | Bilious Bill Canterbury |- | rowspan=3 style="text-align: center; background-color:#fada00;" |V | rowspan=3 style="text-align: center;" | 6 | rowspan=3| 109 - 606 | rowspan=3| 2F03 | rowspan=3| 30 oktober 1994 | "The Shinning" | Blob Kushell | rowspan=3| Jaundiced Jim Reardon |- | "Time and Punishment" | Count Greg DanulaDearly Departed Dan McGrath |- | "Nightmare Cafeteria" | David Cohen's Severed Hand |- | rowspan=3 style="text-align: center; background-color:#fada00;" |VI | rowspan=3 style="text-align: center;" | 7 | rowspan=3| 134 - 706 | rowspan=3| 3F04 | rowspan=3| 29 oktober 1995 | "Attack of the 50-Foot Eyesores" | John Swartzwelder | rowspan=3| Bob Anderson |- | "Nightmare on Evergreen Terrace" | Steve Tompkins |- | "Homer³" | David S. Cohen |- | rowspan=3 style="text-align: center; background-color:#fada00;" |VII | rowspan=3 style="text-align: center;" | 8 | rowspan=3| 154 - 801 | rowspan=3| 4F02 | rowspan=3| 27 oktober 1996 | "The Thing and I" | Ken Keeler | rowspan=3| Mike B. Anderson |- | "The Genesis Tub" | Dan Greaney |- | "Citizen Kang" | David S. Cohen |- | rowspan=3 style="text-align: center; background-color:#fada00;" |VIII | rowspan=3 style="text-align: center;" | 9 | rowspan=3| 182 - 904 | rowspan=3| 5F02 | rowspan=3| 26 oktober 1997 | "The HΩmega Man" | Mike Scully | rowspan=3| Mark Kirkland |- | "Fly vs. Fly" | David S. Cohen |- | "Easy-Bake Coven" | Ned Goldreyer |- | rowspan=3 style="text-align: center; background-color:#fada00;" |IX | rowspan=3 style="text-align: center;" | 10 | rowspan=3| 207 - 1004 | rowspan=3| AABF01 | rowspan=3| 25 oktober 1998 | "Hell Toupée" | Donick Cary | rowspan=3| Steven Dean Moore |- | "The Terror of Tiny Toon" | Larry Doyle |- | "Starship Poopers" | David S. Cohen |- | rowspan=3 style="text-align: center; background-color:#fada00;" |X | rowspan=3 style="text-align: center;" | 11 | rowspan=3| 230 - 1104 | rowspan=3| BABF01 | rowspan=3| 31 oktober 1999 | "I Know What You Diddily-Iddily-Did" | Donick Cary | rowspan=3| Pete Michels |- | "Desperately Xeeking Xena" | Tim Long |- | "Life's a Glitch, Then You Die" | Ron Hauge |- | rowspan=3 style="text-align: center; background-color:#fada00;" |XI | rowspan=3 style="text-align: center;" | 12 | rowspan=3| 249 - 1201 | rowspan=3| BABF21 | rowspan=3| 1 november 2000 | "G-G-Ghost D-D-Dad" | rowspan=3| Rob LaZebnikJohn Frink Don PayneCarolyn Omine | rowspan=3| Matthew Nastuk |- | "Scary Tales Can Come True" |- | "The Night of the Dolphin" |- | rowspan=3 style="text-align: center; background-color:#fada00;" |XII | rowspan=3 style="text-align: center;" | 13 | rowspan=3| 270 - 1301 | rowspan=3| CABF19 | rowspan=3| 6 november 2001 | "Hex and the City" | Joel H. Cohen | rowspan=3| Jim Reardon |- | "House of Whacks" | John FrinkDon Payne |- | "Wiz Kids" | Carolyn Omine |- | rowspan=3 style="text-align: center; background-color:#fada00;" |<big>XIII 14 292 - 1401 DABF19 3 november 2002 "Send in the Clones" Marc Wilmore David Silverman "The Fright to Creep and Scare Harms" Brian Kelley "The Island of Dr. Hibbert" Kevin CurranXIV 15 314 - 1501 EABF21 2 november 2003 "Reaper Madness" John Swartzwelder Steven Dean Moore "Frinkenstein" "Stop the World, I Want to Goof Off"XV 16 336 - 1601 FABF23 7 november 2004 "The Ned Zone" Bill Odenkirk David Silverman "Four Beheadings and a Funeral" "In the Belly of the Boss"XVI 17 360 - 1704 GABF17 6 november 2005 "B.I.: Bartificial Intelligence" Marc Wilmore David Silverman "Survival of the Fattest" "I've Grown a Costume on Your Face"XVII 18 382 - 1804 HABF17 5 november 2006 "Married To The Blob" Peter Gaffney David SilvermanMatthew Faughnan "You Gotta Know When To Golem" "The Day the Earth Looked Stupid"XVIII 19 405 - 1905 JABF16 4 november 2007 "E.T., Go Home" Marc Wilmore Chuck Sheetz "Mr. & Mrs. Simpson" "Heck House"XIX 20 424 - 2004 KABF16 2 november 2008 "Untitled Robot Parody" Matt Warburton Bob Anderson "How to Get Ahead in Dead-vertising" "It's the Grand Pumpkin, Milhouse"XX 21 445 - 2104 LABF14 18 oktober 2009 "Dial M for Murder or Press # to Return to Main Menu"Daniel ChunMike B. AndersonMatthew Shofield "Don't Have a Cow, Mankind" "There's No Business Like Moe Business"XXI 22 468 - 2204 MABF16 7 november 2010 "War and Pieces"Sponge Bob Anderson PantsAs Predicted, Joel Cohen Just Died "Tweenlight" "Master and Cadaver"
Serietidning Nr Utgivning Titel Manus Teckning1september 1995"Little Shop of Homers"Mike Allred"Cool Costumes""Call me Homer"Jeff Smith"Bart People"James RobinsonBill Morrison2september 1996"Sideshow Blob!"Paul Dini"The Exorsister"Peter Bagge3september 1997"The Immigration of the Body Snatchers!"Evan Dorkin"Fatal Reception"Scott Gimple4september 1998"I faced Tahn-enn-bahm"Chuck Dixon"Rigel Four, Springfield Zero"Geof Darrow"The Illustrative Man"Batton Lash5september 1999"Dark Lisa"Jill Thompson"Xt'tapalatakettle's Day"Scott Shaw Sergio AraSergio Ara"Apu on Rigel 7"Doug TenNapel6september 2000"Hell-O-Ween"Ian Bothby Jim MahfoodSergio Ara"Metamorph Simpsons"Peter KuperPeter Kuper"Young Frinkenstein"Bill Morrison"From Duffs Till Dawn"Scott Morse7september 2001"In Springfield No-One Can Hear You Scream"Garth EnnisJohn Mccrea"I'm Not In Springfield Anymore"Stan SakaiStan Saki"Homererectus"Troy NixeyTroy Nixey"Catastrophe in Substitute Springfields!"Mark HamillBill MorrisonJason Ho Mike Rote8september 2002"Night of Nineteen Screams!"Ty TempletonTy Templeton"Tales From The Kwik-E-Mart"Gail SimoneJill Thompson"Krustine"Scott ShawScott Shaw"The Powerplant of Pain"Hilary Barta Stephen SullivanHilary Barta9september 2003"Ring Around the Simpsons"Ean BoothbyDanger Brereton"The Cask of Amontilla-D'oh"Paul Dini"From Hell and Back"Gary MillidgeGary Millidge10september 2004"Bart Simmons God of Thunder!"Chris Yambar"The Legend of Batterface"Chris Yambar"House of a Thousand Donuts"Ty Templeton"Scareway to Heaven"Bill Morrison11september 2005"The Sub-Basement of Dracula"Mary Wolfman"Squish Thing"Len WeinBernie Wrightson"Two Tickets to Heck!"Chris Bonham Steve RinggenbergBernie Wrightson12september 2006"Homer's Ark!"Terry MooreTerry Moore"Blood Curse of the Evil Fairies!"Kyle BakerKyle Baker"Willie: Portrait of a Groundskeeper"Eric PowellEric Powell13september 2007"Gnaws!"Brian Posehn Gerry DugganHilary Barta"They Draw"Patton Oswalt"Prop, Prop, Whiz, Whiz!"Ian Boothby Pia GuerraPia Guerra"The Pygmy Elixir"Thomas Lennon14september 2008"30 Days of D'oh"Glenn Fabry Steve NilesGlenn Fabry"Murder He Wrote"Ian Boothby"Homerstein Conquers The World! Part II: War of the Gargantua Homersteins"Gilbert Hernandez15september 2009"Cloud 13"Tim Hensley"The Call of Vegulu!"Matthew ThurberKevin Huizenga"Blurst Again!"Jordan Crane"Mo' Bodies Moe Problems"Ted MaySammy Harkham"The Gods Must Be Lazy!"Will Sweeney"Contributors of the Damned"Jon VermilyeaSammy Harkham"C. H. U. M."Jon Vermilyea"Three Little Kids"John Kerschbaum"Boo-tleg"Ben Jones"Bad Milhouse"Jeffrey Brown"The Slipsons"C. F.16september 2010"I Screwed Up Big-Time And Unleashed The Glavin On An Unsuspecting World! I Totally Saved The Earth's Butt And Made The Glavin Cry Like A Little Wuss!"Evan DorkinEvan Dorkin"The Coff-Diddly-Offin"Kelvin MaoKelley Jones"Tell-Tale Bart"Peter KuperPeter Kuper"Homer Goes To Hell!"Lemmy KilmisterTom PeyerTone Rodriguez"Marge Attacks!"Nathan KaneJason HoNathan Kane
Treehouse of Horror Reprint Nr UtgivningHeebie-Jeebie Hullabalooseptember 1999Spine-Tingling Spooktacularseptember 2001Fun-Filled Frightfestseptember 2003Hoodoo Voodoo Brouhahaseptember 2006Dead Man's Jestaugusti 2008
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