<P> Legion is an American cable television series created for FX by Noah Hawley, based on the Marvel Comics character David Haller / Legion . It is connected to the X-Men film series, the first television series to be so, and is produced by FX Productions in association with Marvel Television . Hawley serves as showrunner on the series . </P> <P> Dan Stevens stars as Haller, a mutant diagnosed with schizophrenia at a young age . Rachel Keller, Aubrey Plaza, Bill Irwin, Jeremie Harris, Amber Midthunder, Katie Aselton, and Jean Smart also star . FX and Marvel Television announced a new collaboration to create a television series based on the X-Men character Legion in October 2015, with Hawley signed on to write, and direct the pilot . Casting began by January 2016, and filming took place in Vancouver . Hawley wanted to show Haller as an "unreliable narrator", including mixing 1960s design with modern - day elements, and filming the series through the title character's distorted view of reality . </P> <P> The eight - episode first season of Legion premiered at the Pacific Design Center on January 26, 2017, ahead of its FX debut on February 8 . The series received critical acclaim, particularly for its visuals and departure from superhero genre standards . A ten - episode second season was ordered in March 2017 and is planned for a February 2018 release . </P> <P> David Haller was diagnosed with schizophrenia at a young age and has been a patient in various psychiatric hospitals since . After Haller has an encounter with a fellow psychiatric patient, he is confronted with the possibility that there may be more to him than mental illness . </P>

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