Legion is an American Sci-Fi TV series created by Noah Hawley for FX and in association with marvel Studios. The TV series is based on the comic book of the same name. David Haller, AKA Legion, is a troubled young man who can be more than human. Diagnosed as a schizophrenic, David has been in and out of psychiatric hospitals for years. But after a strange encounter with another patient, he faces the possibility that the voices he hears and the visions he sees may be real.