The Simpsons — 500 Keys (S22 E21)

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

Watch The Simpsons — 500 Keys (S22 E21) Episode Free

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

Original title

The Simpsons

Genres

Animation · Comedy

Release date

2011-05-15

Rating

7.0/10

Runtime

23 min

Status

Returning Series

Production countries

United States of America

Seasons

38

Episodes

816

Networks

FOX