Stars

Dan Stevens, Mackenzie Gray, Scott Lawrence

Not all superheroes wear capes, as evidenced in “Legion.” Based on the Marvel Comics character of the same name, the show stars Dan Stevens as David Haller, aka Legion, who was diagnosed with schizophrenia at a young age and has been in and out of psychiatric hospitals ever since. After a fateful encounter with a fellow patient, he realizes that the voices and visions he deals with might just be real. “Legion,” by the way, is connected to the “X-Men” film series, making it the franchise’s first step into TV.