Recap / The Simpsons S 12 E 9 HOMR
After losing the family's life savings in the stock market, Homer gets a job as a test subject for scientific experiments, one of which reveals the true reason behind his stupidity: a crayon that got stuck in his brain when he was a child. When Homer gets the crayon surgically removed, he becomes a more intelligent man — and soon learns that being smart doesn't equal being happy.

This episode contains examples of: