The Simpsons - Season 22 Episode 21 : 500 Keys

The Simpsons
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When the Simpsons discover a collection of keys to every door in Springfield, Lisa stumbles upon an eerie hidden classroom beneath Springfield Elementary School. When she shares her discovery with Principal Skinner, the secret room mysteriously disappears and he takes the only key away. A determined Lisa uses her detective skills to lead her back to the room to solve an old school mystery.

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Title The Simpsons - Season 22 Episode 21 : 500 Keys
Alternative Titles Os Simpson, Al-Shamshoon, Simpsonlar oilasi
First Air Date 1989-12-17
Last Air Date 2021-11-28
Number of Episodes 717
Number of Seasons 33
Genres Family, Animation, Comedy,
Networks FOX,
Casts , , , , ,
Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)
Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)
Dan Castellaneta
Marge Simpson / Patty Bouvier / Selma Bouvier (voice)
Marge Simpson / Patty Bouvier / Selma Bouvier (voice)
Julie Kavner
Bart Simpson / Nelson Muntz / Ralph Wiggum (voice)
Bart Simpson / Nelson Muntz / Ralph Wiggum (voice)
Nancy Cartwright
Lisa Simpson (voice)
Lisa Simpson (voice)
Yeardley Smith
Moe Szyslak / Chief Wiggum / Apu / Comic Book Guy / Carl (voice)
Moe Szyslak / Chief Wiggum / Apu / Comic Book Guy / Carl (voice)
Hank Azaria
Ned Flanders / Mr. Burns / Smithers / Skinner / Lenny (voice)
Ned Flanders / Mr. Burns / Smithers / Skinner / Lenny (voice)
Harry Shearer
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