The Simpsons - Season 22 Episode 21 : 500 Keys

The Simpsons
7.2/10 by 2262 users

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.

Title The Simpsons - Season 22 Episode 21 : 500 Keys
Alternative Titles Los Simpson, Die Simpsons, Los Simpson, Los Simpsons, The Simpsons, Simpsonlar oilasi
Subtitle Available south-korea.png france.png Germany.png italy.png espain.png belanda.png portugal.png hungaria.png ETC.
First Air Date 1989-12-17
Last Air Date 2019-12-01
Number of Episodes 672
Number of Seasons 31
Genres Animation, Comedy,
Networks FOX,
Casts Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria, Harry Shearer
Homer Simpson
Homer Simpson
Dan Castellaneta
Marge Simpson
Marge Simpson
Julie Kavner
Bart Simpson
Bart Simpson
Nancy Cartwright
Lisa Simpson
Lisa Simpson
Yeardley Smith
Apu
Apu
Hank Azaria
Ned Flanders
Ned Flanders
Harry Shearer
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