The Simpsons - 'Treehouse of Horror #21'
American iTunes Chart Performance

• Release date: 07 Nov 2010
• Chart debut: #16 (08 Nov 2010)
• Highest Position: #16 (08 Nov 2010)
• Most recent chart position: #96 (17 Nov 2010)
• Days on US TV Episodes Chart: 10

'Treehouse of Horror #21' has charted in the following countries:
United States and Canada.

Episode Synopsis: In this annual terror-filled trilogy, the old board games in the Simpson attic come to life and wreak havoc in Springfield, Marge and Homer's romantic cruise is interrupted by a mysterious, handsome stranger who Homer believes is trying to kill them, and Lisa falls in love with a tweenage vampire, only to run afoul of his old-school vampire father.

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US TV Episodes chart performance history for Treehouse of Horror #21

• Pranks & Greens
• Oh Brother Where Bart Thou
• O Brother, Where Bart Thou?
• HOMR
• Lost Verizon
• Mr. Plow
• Thursdays With Abie
• Once Upon a Time In Springfield
• Million Dollar Maybe
• Boy Meets Curl
• The Color Yellow
• Homer VS the 18th Amendment
• Whacking Day
• Postcards From the Wedge
• Stealing First Base
• The Greatest Story Ever D'ohed
• American History X-Cellent
• Chief of Hearts
• The Squirt & the Whale
• The Surveil with Love
• Moe Letter Blues
• The Bob Next Door
• Judge Me Tender
• Elementary School Musical
• Loan-a-Lisa
• Moneybart
• Treehouse of Horror XVII
• Treehouse of Horror XIV
• Treehouse of Horror #21
• Lisa Simpson This Isn't Your Life
• The Fool Monty
• How Munched Is That Birdie In the Window
• The Fight Before Christmas
• Donnie Fatso
• Simpsons Roasting On an Open Fire
• Moms I'd Like to Forget
• Flaming Moe
• Homer the Father
• The Blue and the Gray
• Angry Dad: The Movie
• The Scorpion's Tale
• Midsummer's Nice Dreams
• Love Is a Many Strangled Thing
• The Great Simpsina
• The Real Housewives of Fat Tony
• Homer Scissorhands
• 500 Keys
• The Ned-Liest Catch
• The Falcon and the D'Ohman
• Bart Stops to Smell the Roosevelts
• Treehouse of Horror XXII
• Replaceable You
• The Food Wife
• The Book Job
• Simpsons Christmas Stories
• The Man in the Blue Flannel Pants
• The Ten-Per-Cent Solution
• Holidays of Future Passed
• Politically Inept, With Homer Simpson
• The D'Oh-cial Network
• Moes Goes from Rags to Riches
• The Daughter Also Rises
• At Long Last Leave
• Exit Through the Kwik-E Mart
• How I Wet Your Mother
• Them, Robot
• Beware My Cheating Bart
• Totally Fun Thing That Bart Will Never Do
• The Spy Who Learned Me
• Ned 'n Edna's Blend Agenda
• Lisa Goes Gaga
• Stark Raving Dad
• Moonshine River
• Treehouse of Horror XXIII
• Adventures in Baby-Getting
• Gone Abie Gone
• Penny-Wiseguys
• A Tree Grows in Springfield
• The Day the Earth Stood Cool
• To Cur With Love
• Homer Goes to Prep School
• A Test Before Trying
• The Changing of the Guardian
• Love is a Many-Splintered Thing
• Gorgeous Grampa
• Blake-Eyed Please
• Dark Knight Court
• What Animated Women Want
• Pulpit Friction
• Whiskey Business
• The Fabulous Faker Boy
• The Saga of Carl
• Dangers On a Train
• Homerland
• Treehouse of Horror XXIV
• Four Regrettings and a Funeral
• Yolo
• Labor Pains
• The Kid Is All Right
• Yellow Subterfuge
• White Christmas Blues
• Steal This Episode
• Married to the Blob
• Specs and the City
• The Winter of His Content
• The War of Art
• You Don't Have to Live Like a Referee
• Lucas
• Days of Future Future
• What to Expect When Bart's Expecting
• Brick Like Me
• Pay Pal
• The Yellow Badge of Cowardge
• Clown in the Dumps
• The Wreck of the Relationship
• Super Franchise me
• Treehouse of Horror XXV
• Opposites a-Frack
• Simpsorama
• Blazed and Confused
• Covercraft
• I Won't Be Home for Christmas
• The Man Who Came to Be Dinner
• Bart's New Friend
• The Musk Who Fell to Earth
• Walking Big & Tall
• My Fare Lady
• The Princess Guide
• Waiting for Duffman
• Peeping Mom
• The Kids Are All Fight
• Let's Go Fly a Coot
• Bull-E
• Mathlete's Feat
• Every Man's Dream
• 'Cue Detective
• Puffless
• Halloween of Horror
• Treehouse of Horror XXVI
• Friend with Benefit
• Lisa with an 's'
• 'paths of Glory
• Barthood
• The Girl Code
• Teenage Mutant Milk-Caused Hurdles
• Much Apu About Something
• Love Is in the N2-O2-Ar-Co2-Ne-He-Ch4
• Gal of Constant Sorrow
• Lisa the Veterinarian
• The Burns Cage
• How Lisa Got Her Marge Back
• Fland Canyon
• To Courier with Love
• Simprovised
• Orange is the new Yellow
• Monty Burns' Fleeing Circus
• Friends and Family
• The Town
• Treehouse of Horror XXVII
• Trust but Clarify
• There Will Be Buds
• Havana Wild Weekend
• Dad Behavior
• The Last Traction Hero
• The Nightmare After Krustmas
• Pork and Burns
• The Great Phatzby
• The Great Phatsby
• Fatzcarraldo
• The Cad and the Hat
• Kamp Krustier
• A Father's Watch
• The Caper Chase
• Looking for Mr. Goodbart
• Moho House
• Dogtown
• The Serfsons
• Springfield Splendor
• Whistler's Father
• Treehouse of Horror XXVIII
• Grampy Can Ya Hear Me
• The Old Blue Mayor She Ain't What She Used to Be
• Singin' in the Lane
• Mr. Lisa's Opus
• Gone Boy
• Haw-Haw Land
• Frink Gets Testy
• Homer Is Where the Art Isn't
• 3 Scenes Plus a Tag from a Marriage
• Fears of a Clown
• No Good Read Goes Unpunished
• King Leer
• Lisa Gets the Blues
• Forgive and Regret
• Left Behind
• Throw Grampa from the Dane
• Flanders' Ladder
• Bart's Not Dead
• Heartbreak Hotel
• My Way or the Highway to Heaven
• Treehouse of Horror XXIX
• Baby You Can't Drive My Car
• From Russia Without Love
• Werking Mom
• Krusty the Clown
• Daddicus Finch
• 'tis the 30th Season
• Mad About the Toy
• The Girl On the Bus
• I'm Dancing as Fat as I Can
• The Clown Stays in the Picture
• E My Sports
• Bart vs. Itchy & Scratchy
• D'oh Canada
• Woo-Hoo Dunnit?
• The Winter of Our Monetized Content
• Go Big or Go Homer
• The Fat Blue Line
• Treehouse of Horror XXX
• Gorillas On the Mast
• Marge the Lumberjill
• Livin' la Pura Vida
• Thanksgiving of Horror
• Todd, Todd, Why Hast Thou Forsaken Me?
• Bobby, It's Cold Outside
• Hail to the Teeth
• The Miseducation of Lisa Simpson
• Frinkcoin
• Bart the Bad Guy
• Screenless
• Better Off Ned
• Highway to Well
• The Incredible Lightness of Being a Baby
• Warrin' Priests
• Warrin' Priests Part Two
• The Hateful Eight-Year-Old
• The Way of the Dog
• Undercover Burns
• I, Carumbus
• Now Museum, Now You Don't
• Treehouse of Horror XXXI
• The 7 Beer Itch
• Podcast News
• Three Dreams Denied
• The Road to Cincinnati
• Sorry Not Sorry
• A Springfield Summer Christmas for Christmas
• The Dad-Feelings Limited
• Wad Goals
• Yokel Hero
• Manger Things
• The Star of the Backstage
• Bart's in Jail!
• Treehouse of Horror XXXII
• The Wayz We Were
• Lisa's Belly
• A Serious Flanders
• A Serious Flanders Part 2
• Portrait of a Lackey On Fire
• Mothers and Other Strangers
• Goo Goo Gai Pan
• A Made Maggie
• The Longest Marge
• Pixelated & Afraid
• Boyz N the Highland
• You Won't Believe What This Episode Is About - Act Three Will Shock You!
• Bart the Cool Kid
• Pretty Whittle Liar
• The Sound of Bleeding Gums
• My Octopus and a Teacher
• Girls Just Shauna Have Fun
• Marge the Meanie
• Meat is Murder
• Poorhouse Rock
• Black-Eyed Please
• Habeus Tortoise
• One Angry Lisa
• Lisa the Boy Scout
• The King of Nice
• Not It
• Treehouse XXXIII
• From Beer To Paternity
• Step Brother From the Same Planet
• When Nelson Met Lisa
• Game Done Changed
• Top Goon
• My Life as a Vlog
• The Many Saints of Springfield
• Treehouse of Horror XX
• Carl Carlson Rides Again
• Bartless
• Pin Gal
• Fan-ily Feud
• Write Off This Episode
• The Very Hungry Caterpillars
• Clown V. Board of Education
• Homer's Adventures Through the Windshield Glass
• Homer's Paternity Coot
• Homer's Crossing
• A Mid-Childhood Night's Dream
• McMansion & Wife
• Thirst Trap: A Corporate Love Story
• Treehouse of Horror XXXIV
• Iron Marge
• It's a Blunderful Life
• Ae Bonny Romance
• Murder, She Boat
• Do the Wrong Thing
• Frinkenstein's Monster
• Night of the Living Wage
• Cremains of the Day
• The Tell-Tale Pants
• The Tipping Point
• Bart's Brain
• Marge vs. the Monorail
• Bart to the Future
• Bart's Birthday
• The Yellow Lotus
• Desperately Seeking Lisa
• Shoddy Heat