The third and final season of the American surrealist superhero thriller television series Legion premiered on FX on June 24, 2019, and concluded August 12, totaling eight episodes. The series is based on the Marvel Comics character David Haller, a mutant diagnosed with schizophrenia at a young age, who learns that his illness may actually be powerful psychic abilities. In the final season, David recruits a time-traveling mutant to help him rewrite the past to fix his life, all while his former friends hunt him down. It was produced by FX Productions in association with Marvel Television, with Noah Hawley serving as showrunner.