The Simpsons - 'Treehouse of Horror XXI'
Australian iTunes Chart Performance

• Release date: 07 Nov 2010
• Chart debut: #84 (27 Apr 2022)
• Highest Position: #84 (27 Apr 2022)
• Most recent chart position: #84 (27 Apr 2022)
• Days on Australian TV Chart: 2

'Treehouse of Horror XXI' has charted in the following countries:
Germany and Australia.

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 whom 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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Australian TV chart performance history for Treehouse of Horror XXI

• Lost Verizon
• Homer VS the 18th Amendment
• Whacking Day
• Stealing First Base
• See Homer Run
• The Bob Next Door
• Treehouse of Horror XIX
• Treehouse of Horror XVI
• Treehouse of Horror
• Treehouse of Horror XIII
• Sex, Pies & Idiot Scrapes
• Double Double Boy In Trouble
• Gone Maggie Gone
• Mypods & Boomsticks
• In the Name of the Grandfather
• Saturdays of Thunder
• Lisa's Substitute
• Lisa's Pony
• The Old Man and the Key
• The Dad That Knew Too Little
• The Good, the Sad and the Drugly
• Moneybart
• Treehouse of Horror IV
• Treehouse of Horror XVII
• Treehouse of Horror XIV
• Treehouse of Horror VII
• Treehouse of Horror II
• Treehouse of Horror X
• Treehouse of Horror V
• Treehouse of Horror XI
• Waverly Hills 9021-D'Oh
• The Fool Monty
• Coming to Homerica
• The Burns and the Bees
• Homer & Lisa Exchange Cross Words
• 4 Great Women & Manicures
• Simpsons Roasting On an Open Fire
• The Father, The Son and the Holy Guest Star
• Midsummer's Nice Dreams
• Trash of the Titans
• Sex, Pies and Idiot Scrapes
• Homer Scissorhands
• Bart Gets an F
• The Falcon and the D'Ohman
• Bart Stops to Smell the Roosevelts
• Treehouse of Horror XXII
• Replaceable You
• The Food Wife
• Simpsons Christmas Stories
• The Man in the Blue Flannel Pants
• Holidays of Future Passed
• Moes Goes from Rags to Riches
• The Daughter Also Rises
• How I Wet Your Mother
• Beware My Cheating Bart
• Lisa Goes Gaga
• Stark Raving Dad
• Bart the Murderer
• Moonshine River
• Treehouse of Horror XXIII
• Treehouse of Horror XVIII
• 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
• Hardly Kirk-ing
• Gorgeous Grampa
• Blake-Eyed Please
• Dark Knight Court
• Whiskey Business
• The Fabulous Faker Boy
• The Saga of Carl
• 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 Man Who Grew Too Much
• Diggs
• The Winter of His Content
• The War of Art
• You Don't Have to Live Like a Referee
• Days of Future Future
• What to Expect When Bart's Expecting
• Brick Like Me
• Pay Pal
• The Yellow Badge of Cowardge
• Luca$
• 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
• Sky Police
• 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'
• Barthood
• The Girl Code
• Teenage Mutant Milk-Caused Hurdles
• Much Apu About Something
• Paths of Glory
• Love Is in the N2-O2-Ar-Co2-Ne-He-Ch4
• Gal of Constant Sorrow
• Lisa the Veterinarian
• The Marge-Ian Chronicles
• The Burns Cage
• 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
• Fatzcarraldo
• 22 for 30
• The Serfsons
• Springfield Splendor
• Whistler's Father
• 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
• 3 Scenes Plus a Tag from a Marriage
• 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
• The Girl On the Bus
• E My Sports
• Bart vs. Itchy & Scratchy
• 101 Mitigations
• Mr. Lisa Goes to Washington
• I'm Just a Girl Who Can't Say D'oh
• D'oh Canada
• When Flanders Failed
• The Winter of Our Monetized Content
• Go Big or Go Homer
• The Fat Blue Line
• Treehouse of Horror XXX
• Gorillas On the Mast
• Burns Verkaufen Der Kraftwerk
• Todd, Todd, Why Hast Thou Forsaken Me?
• Homer Defined
• Bart the Bad Guy
• Screenless
• Better Off Ned
• Warrin' Priests Part Two
• The Otto Show
• 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
• Do Pizza Bots Dream of Electric Guitars?
• Manger Things
• Burger Kings
• Panic on the Streets of Springfield
• Diary Queen
• Mother and Child Reunion
• The Last Barfighter
• The Man From G.R.A.M.P.A.
• No Loan Again, Naturally
• Lisa the Drama Queen
• Treehouse of Horror XXI
• Principal Charming
• Dancin' Homer
• Treehouse of Horror XX
• One Fish, Two Fish, Blowfish, Blue Fish
• Dangerous Curves
• Treehouse of Horror XV
• Two Cars in Every Garage and Three Eyes On Every Fish
• Brush With Greatness