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The Simpsons: Season 22

22x21 500 Keys
TV-PG

Episode

Wikisimpsons IMDB TMDB

Aired2011-05-16T00:00:00Z on FOX
Runtime23m
DirectorBob Anderson

WriterJohn Frink
CountryUnited States
LanguagesEnglish
GenresAnimation, Comedy, Family

After finding the keys to every door in Springfield, Lisa finds a hidden room beneath the elementary school.

Private Notes

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Actors
All Cast & Crew

Season Regulars
6

Guest Stars
1

Albert Brooks
Hank Scorpio (voice)

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