Type
Scripted
Premiered
Dec. 17, 1989
Status
Returning Series
Runtime
30 min.
Country
USA
Network
FOX TV Network
Genre

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The Simpsons » Season 22
The Simpsons - 22x21 500 Keys

22x21 500 Keys

ratingratingratingratingrating
4.75/5 (4 votes)
First Aired: May. 15, 2011 on FOX

Summary: 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…
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