At Popisms.com, we show you how pop culture (TV, movies, books, ads) is connected to other pop culture. For example, what song is in that Olympics commercial or TV episode? What book is that character reading? What music is another song sampling? We answer these questions and many more.

The Simpsons: 500 Keys / Season: 22 / Episode: 21 (NABF14) (2011)

The Simpsons: 500 Keys / Season: 22 / Episode: 21 (NABF14) (2011) (Television Episode)
Buy Television Episode Now

The Simpsons

500 Keys (Television Episode)

Season: 22
Episode: 21
Production Code: NABF14

May 15, 2011
 
  • Download on iTunes
  • Buy on Amazon.com
Lisa uncovers a secret classroom located under Springfield Elementary.