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The Simpsons S22E21 poster

Watch The Simpsons – Season 22 Episode 21: 500 Keys

The Simpsons • Season 22, Episode 21 • 23 min • 1989 • ⭐ 8.0/10 • Animation , Comedy , Family

Cast: Dan Castellaneta , Julie Kavner , Nancy Cartwright , Yeardley Smith , Hank Azaria , Harry Shearer

Directors: Matt Groening

Watch The Simpsons – S22E21

Episode Overview

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

Episode Navigation

← Previous Episode Back to Season 22 Series Overview Next Episode →

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