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The Simpsons

1989 · Season 22 · Episode 21

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The Simpsons - S22 E21

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21. 500 Keys

23 min · ★ 7.0

500 Keys

After finding the keys to every door in Springfield, Lisa finds a hidden room beneath the elementary school.

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Season 22⌄
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Season 22 · All Episodes

Elementary School Musical
EPISODE 1

Elementary School Musical

23 min

Loan-a-Lisa
EPISODE 2

Loan-a-Lisa

23 min

MoneyBART
EPISODE 3

MoneyBART

22 min

Treehouse of Horror XXI
EPISODE 4

Treehouse of Horror XXI

23 min

Lisa Simpson, This Isn't Your Life
EPISODE 5

Lisa Simpson, This Isn't Your Life

23 min

The Fool Monty
EPISODE 6

The Fool Monty

23 min

How Munched Is That Birdie in the Window?
EPISODE 7

How Munched Is That Birdie in the Window?

22 min

The Fight Before Christmas
EPISODE 8

The Fight Before Christmas

23 min

Donnie Fatso
EPISODE 9

Donnie Fatso

23 min

Moms I'd Like to Forget
EPISODE 10

Moms I'd Like to Forget

22 min

Flaming Moe
EPISODE 11

Flaming Moe

23 min

Homer the Father
EPISODE 12

Homer the Father

22 min

The Blue and the Gray
EPISODE 13

The Blue and the Gray

23 min

Angry Dad: The Movie
EPISODE 14

Angry Dad: The Movie

23 min

The Scorpion's Tale
EPISODE 15

The Scorpion's Tale

23 min

A Midsummer's Nice Dream
EPISODE 16

A Midsummer's Nice Dream

22 min

Love Is a Many Strangled Thing
EPISODE 17

Love Is a Many Strangled Thing

22 min

The Great Simpsina
EPISODE 18

The Great Simpsina

23 min

The Real Housewives of Fat Tony
EPISODE 19

The Real Housewives of Fat Tony

23 min

Homer Scissorhands
EPISODE 20

Homer Scissorhands

23 min

500 Keys
EPISODE 21

500 Keys

23 min

The Ned-liest Catch
EPISODE 22

The Ned-liest Catch

23 min