«The Simpsons» – Season 22 Episode 21 watch online
Episode Title: «500 Keys»
Episode Released: 05.15.2011
Season number: 22
Episode number: 21
Episode Description: Beware, spoilers! To read - hover over the text.
Maggie is accidentally locked in the car with the key inside. In search of a spare car key, the Simpsons find a set of keys to each door. However, Maggie is released from the machine. After that, the family begins to use keys. At school, Lisa opens one of the keys locked the door with the sign "Banned band books" and finds the room is equipped with a few classes.