Malcolm in the Middle: Season 5, Episode 18
5 - 18: Dewey's Special Class
Malcolm tries to keep Dewey from scoring high on an IQ test so he doesn't end up with the Krelboyne's, but scheme backfires and Dewey is diagnosed as mentally disturbed.
Malcolm tries to keep Dewey from scoring high on an IQ test so he doesn't end up with the Krelboyne's, but scheme backfires and Dewey is diagnosed as mentally disturbed.