The Simpsons 22x21
500 Keys
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.
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The Simpsons season 22
22x1Elementary School Musical Sep 26, 2010
22x2Loan-a-Lisa Oct 03, 2010
22x3MoneyBART Oct 10, 2010
22x4Treehouse of Horror XXI Nov 07, 2010
22x5Lisa Simpson, This Isn't Your Life Nov 14, 2010
22x6The Fool Monty Nov 21, 2010
22x7How Munched is that Birdie in the Window? Nov 28, 2010
22x8The Fight Before Christmas Dec 05, 2010
22x9Donnie Fatso Dec 12, 2010
22x10Moms I'd Like to Forget Jan 09, 2011
22x11Flaming Moe Jan 16, 2011
22x12Homer the Father Jan 23, 2011
22x13The Blue and the Gray Feb 13, 2011
22x14Angry Dad: The Movie Feb 20, 2011
22x15The Scorpion's Tale Mar 06, 2011
22x16A Midsummer's Nice Dream Mar 13, 2011
22x17Love Is a Many Strangled Thing Mar 27, 2011
22x18The Great Simpsina Apr 10, 2011
22x19The Real Housewives of Fat Tony May 01, 2011
22x20Homer Scissorhands May 08, 2011
22x21500 Keys May 15, 2011
22x22The Ned-Liest Catch May 22, 2011