Malcolm in the Middle S05E18 - Dewey's Special Class

Malcolm in the Middle (2000)
S05E18 Dewey's Special Class
Episode Overview
Malcolm persuades Dewey to intentionally sabotage his performance on an I.Q. test to avoid the embarrassment of being labeled a Krelboyne student. However, Dewey's attempt backfires spectacularly, landing him in a class for emotionally disturbed students. Meanwhile, Hal and Craig find themselves in a fierce rivalry as they compete against each other in a dance competition.