The Simpsons

Series 22 - 21. 500 Keys

About this programme

21/22. Lisa gets her hands on a collection of keys to every door in Springfield, and soon uncovers a hidden classroom beneath the school, telling Principal Skinner about her discovery. He confiscates the key from her, but she remains determined to investigate the mysterious room.

Cast and crew

Cast

Homer Simpson
Dan Castellaneta
Marge Simpson
Julie Kavner
Bart Simpson
Nancy Cartwright
Lisa Simpson
Yeardley Smith
Principal Skinner
Harry Shearer