Treehouse of Horror XXI/Gags

Episode

References

Gags

Appearances

Gallery

Quotes

Credits

Treehouse of Horror XXI

Lisa Simpson, This Isn't Your Life

◄	Treehouse of Horror XX

Treehouse of Horror XXI

Treehouse of Horror XXII

Title Screen Gag[]

The lady shushing and the girl screaming are replaced by Wilhelm's scream.

◄ Season 21	Season 22 Gags	Season 23 ►
Elementary School Musical • Loan-a Lisa • MoneyBART • Treehouse of Horror XXI • Lisa Simpson, This Isn't Your Life • The Fool Monty • How Munched is That Birdie in the Window? • The Fight Before Christmas • Donnie Fatso • Moms I'd Like to Forget • Flaming Moe • Homer the Father • The Blue and the Gray • Angry Dad: The Movie • The Scorpion's Tale • A Midsummer's Nice Dream • Love is a Many Strangled Thing • The Great Simpsina • The Real Housewives of Fat Tony • Homer Scissorhands • 500 Keys • The Ned-liest Catch