The Simpsons
500 Keys
Season 22, Episode 21 · Aired 2011-05-15
Synopsis
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.
In the series
This episode is part of The Simpsons (1989–present) on Fox.
Yellow family, infinite couch gags, and the longest-running joke about America itself.
Key cast
- Dan Castellaneta as Homer Simpson
- Julie Kavner as Marge Simpson
- Nancy Cartwright as Bart Simpson
- Yeardley Smith as Lisa Simpson
- Hank Azaria as Moe / Chief Wiggum
- Harry Shearer as Mr. Burns / Ned Flanders