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The_Simpsons_405_Treehouse_of_Horror_III - An evil Krusty doll and a King Kong parody. Need I say more?
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The_Simpsons_505_Treehouse_of_Horror_IV - Homer sells his soul for a donut, a gremlin only Bart can see vandalises a moving bus and Mr Burns is a vampire.
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606_Treehouse_of_Horror_V - No TV and no beer makes Homer something something...