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X-Episodes > The Simpsons > Season 22 > Episode 21: 500 Keys
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Watch The Simpsons: 500 Keys

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.

Airdate: 2011-05-15
Viewed: 187779x Link to this page:

Comments 31 comment(s)

  1. Gramoz12
    Gramoz12 wrote:Flag4 Feb 2012 13:54

    BEST...EPISODE...EVER!

  2. doofman
    doofman wrote:Flag23 Jan 2012 2:54

    lisa has a violin in the intro ?

  3. mattlou87
    mattlou87 wrote:Flag6 Dec 2011 2:16

    I like cheese.

  4. titut123
    titut123 wrote:Flag2 Dec 2011 17:15

    i liked the part wen he said and the day after that

  5. thelastmexican
    thelastmexican wrote:Flag27 Nov 2011 1:17

    i liked the end XD it was funneh

  6. Goat777Face
    Goat777Face wrote:Flag14 Nov 2011 9:52

    Maybe we'll fall real slow like Inception...

  7. Daniel_21
    Daniel_21 wrote:Flag4 Nov 2011 7:08

    This was a good ep one of the best since a couple of seasons ago!

  8. EVERYONE-KNOWS-ITS
    EVERYONE-KNOWS-ITS wrote:Flag20 Oct 2011 4:38

    I DON'T GET IT

  9. tyrone13
    tyrone13 wrote:Flag9 Oct 2011 13:06

    i love the kimponts

  10. Bawlsack
    Bawlsack wrote:Flag23 Sep 2011 21:29

    "Maybe we'll fall real slow like Inception" xD ahaha

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