The Simpsons S22E21

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The Simpsons Season 22 Episode 21 : 500 Keys

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.

NameThe Simpsons Season 22 : 500 Keys
Air DateMay 15th, 2011
GenresFamily, Animation, Comedy
NetworkFOX
Production CompaniesThe Curiosity Company, Gracie Films, 20th Century Fox Television
WriterJohn Frink
DirectorBob Anderson
Guest StarAlbert Brooks
Plot Keywordscartoon, satire, nuclear power plant, parody, middle class, dysfunctional family, social satire
Dan Castellaneta
Dan Castellaneta
Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)
Julie Kavner
Julie Kavner
Marge Simpson / Patty Bouvier / Selma Bouvier (voice)
Nancy Cartwright
Nancy Cartwright
Bart Simpson / Nelson Muntz / Ralph Wiggum (voice)
Yeardley Smith
Yeardley Smith
Lisa Simpson (voice)
Hank Azaria
Hank Azaria
Moe Szyslak / Chief Wiggum / Apu / Comic Book Guy / Carl (voice)
Harry Shearer
Harry Shearer
Ned Flanders / Mr. Burns / Smithers / Skinner / Lenny (voice)

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