THE SIMPSONS “500 Keys” Season 22 Episode 21 Photo

THE SIMPSONS 500 Keys

Check out a photo from THE SIMPSONS Season 22 Episode 21 titled “500 Keys” which airs Sunday May 15 at 8pm on FOX. You can read all our coverage of The Simpsons here.

Episode Synopsis: THE SIMPSONS “500 Keys” Season 22 Episode 21 – When the Simpsons discover a collection of keys to every door in Springfield, Lisa stumbles upon an eerie hidden classroom beneath Springfield Elementary School in the all-new “500 Keys” episode of THE SIMPSONS airing Sunday, May 15 (8:00-8:30 PM ET/PT) on FOX.

Click Any Photo Below To Enlarge