The Simpsons Episode 22.21 500 Keys
The Simpsons Photo

The Simpsons Episode 22.21 500 Keys

Episode Premiere
May 15, 2011
Genre
Animation, Comedy
Production Company
FOX, Gracie Films, Film Roman Productions
Official Site
http://www.thesimpsons.com/
Episode Premiere
May 15, 2011
Genre
Animation, Comedy
Period
1989 - now
Production Co
FOX, Gracie Films, Film Roman Productions
Distributor
FOX
Official Site
http://www.thesimpsons.com/
Director
Bob Anderson
Screenwriter
John Frink
Main Cast
  • Dan Castellaneta as Homer Simpson (voice)
  • Julie Kavner
  • Nancy Cartwright as Bart Simpson (voice)
  • Yeardley Smith
  • Harry Shearer
  • Hank Azaria as Chief Wiggum / Moe Szyslak (voice)
  • Pamela Hayden
  • Tress MacNeille
  • Karl Wiedergott

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.