The Simpsons - Season 22 Episode 21
After finding the keys to every door in Springfield, Lisa finds a hidden room beneath the elementary school.
First Air Date : 1989-12-17
Last Air date : 2025-05-04
Runtime : 57 minutes
Genre : Family, Animation, Comedy
Cast : Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria, Harry Shearer
Crew : Danny Elfman (Main Title Theme Composer)
Quality : 
Subtitles :
- Season 22 : Episode 12010-09-26
- Season 22 : Episode 22010-10-03
- Season 22 : Episode 32010-10-10
- Season 22 : Episode 42010-11-07
- Season 22 : Episode 52010-11-14
- Season 22 : Episode 62010-11-21
- Season 22 : Episode 72010-11-28
- Season 22 : Episode 82010-12-05
- Season 22 : Episode 92010-12-12
- Season 22 : Episode 102011-01-09
- Season 22 : Episode 112011-01-16
- Season 22 : Episode 122011-01-23
- Season 22 : Episode 132011-02-13
- Season 22 : Episode 142011-02-20
- Season 22 : Episode 152011-03-06
- Season 22 : Episode 162011-03-13
- Season 22 : Episode 172011-03-27
- Season 22 : Episode 182011-04-10
- Season 22 : Episode 192011-05-01
- Season 22 : Episode 202011-05-08
- Season 22 : Episode 212011-05-15
- Season 22 : Episode 222011-05-22
