The Simpsons - Season 22 Episode 21
The Simpsons - Season 22 Episode 21 - Family TV Shows 22:14. story about 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.
Released: Dec 17, 1989
Runtime: 22:14
Genre: Family, Animation, Comedy
Stars: Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria, Harry Shearer
Networks: FOX
- 1. Elementary School Musical2010-09-26
- 2. Loan-a-Lisa2010-10-03
- 3. MoneyBART2010-10-10
- 4. Treehouse of Horror XXI2010-11-07
- 5. Lisa Simpson, This Isn't Your Life2010-11-14
- 6. The Fool Monty2010-11-21
- 8. The Fight Before Christmas2010-12-05
- 9. Donnie Fatso2010-12-12
- 10. Moms I'd Like to Forget2011-01-09
- 11. Flaming Moe2011-01-16
- 12. Homer the Father2011-01-23
- 13. The Blue and the Gray2011-02-13
- 14. Angry Dad: The Movie2011-02-20
- 15. The Scorpion's Tale2011-03-06
- 16. A Midsummer's Nice Dream2011-03-13
- 17. Love Is a Many Strangled Thing2011-03-27
- 18. The Great Simpsina2011-04-10
- 19. The Real Housewives of Fat Tony2011-05-01
- 20. Homer Scissorhands2011-05-08
- 21. 500 Keys2011-05-15
- 22. The Ned-liest Catch2011-05-22