"HOMR" (styled as "HOMЯ") is the ninth episode of the twelfth season of the American animated sitcom The Simpsons. The 257th episode overall, it originally aired on the Fox network in the United States on January 7, 2001. In the episode, 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 six years old. He decides to have it removed to increase his IQ, but soon learns that being intelligent is not always the same as being happy.
The episode was written by Al Jean and directed by Mike B. Anderson. Its plot takes inspiration from Flowers for Algernon and its film adaptation Charly. "HOMR" was viewed in 10.2 million households, and it received positive reviews from television critics. In 2001, the episode won an Emmy Award for Outstanding Animated Program, while Al Jean received a nomination in the category "Outstanding Individual Achievement for Writing in an Animated Television Production".