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The Simpsons Season 22 Episode 21 : 500 Keys
7/10 by 9 users
Title:The Simpsons
Genre: Family, Animation, Comedy
Air Date: 2011-05-15
Season Number: 22
Episodes Number: 21
Overview: 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.
Stars: Dan Castellaneta (Homer Simpson), , Julie Kavner (Marge Simpson), , Nancy Cartwright (Bart Simpson), , Yeardley Smith (Lisa Simpson), , Hank Azaria (Apu), , Harry Shearer (Ned Flanders),