The Simpsons Season 12 Episode 9 HOMЯ 2000

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While working as a human guinea pig (to pay off the family's lost savings after making a bad investment), Homer discovers the root cause of his subnormal intelligence: a crayon that was lodged in his brain ever since he was a boy. He decides to have it removed to increase his IQ, but discovers that being smart does not necessarily equal being happy.

Released: 2001-01-07
Runtime : 22 minutes
Genre : Family, Animation, Comedy
Stars : Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria
Director : Danny Elfman