Legion is an American superhero television series created by Noah Hawley for FX, based on the Marvel Comics character David Haller / Legion. Set in an alternate timeline of the X-Men film series, it was produced by FX Productions in association with Marvel Television, and ran for three seasons from 2017 to 2019, with Hawley serving as showrunner.

Noah Hawley is an American screenwriter, director, producer, author, and singer. He is best known for creating and writing the FX series Fargo (2014–present) and Legion (2017–2019). He also worked on the series Bones (2005–2008), The Unusuals (2009), and My Generation (2010).