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.
| Title | The Simpsons - Season 22 Episode 21 : 500 Keys |
|---|---|
| Alternative Titles | Os Simpson, Os Simpsons, Al-Shamshoon, Los Simpsons, 심슨 가족, 심슨네 가족들, Os Simpson, Os Simpsons, Simpsonlar oilasi |
| Subtitle Available |
 ETC.
|
| First Air Date | 1989-12-17 |
| Last Air Date | 2023-03-19 |
| Number of Episodes | 750 |
| Number of Seasons | 34 |
| Genres | Family, Animation, Comedy, |
| Networks | FOX, |
| Casts | Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria, Harry Shearer |
| Plot Keywords | , |
Episodes List
-
The Simpsons Season 22 :Episode 1 Elementary School Musical
2010-09-26Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 2 Loan-a-Lisa
2010-10-03Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 3 MoneyBART
2010-10-10Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 4 Treehouse of Horror XXI
2010-11-07Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 5 Lisa Simpson, This Isn't Your Life
2010-11-14Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 6 The Fool Monty
2010-11-21Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 7 How Munched Is That Birdie in the Window?
2010-11-28Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 8 The Fight Before Christmas
2010-12-05Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 9 Donnie Fatso
2010-12-12Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 10 Moms I'd Like to Forget
2011-01-09Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 11 Flaming Moe
2011-01-16Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 12 Homer the Father
2011-01-23Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 13 The Blue and the Gray
2011-02-13Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 14 Angry Dad: The Movie
2011-02-20Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 15 The Scorpion's Tale
2011-03-06Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 16 A Midsummer's Nice Dream
2011-03-13Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 17 Love Is a Many Strangled Thing
2011-03-27Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 18 The Great Simpsina
2011-04-10Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 19 The Real Housewives of Fat Tony
2011-05-01Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 20 Homer Scissorhands
2011-05-08Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 21 500 Keys
2011-05-15Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
-
The Simpsons Season 22 :Episode 22 The Ned-liest Catch
2011-05-22Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa...
