The Noah Hawley produced and scripted pilot centers on Charles Xavier’s son David Haller. Introduced as a troubled young man bouncing in and out of mental hospitals most of his life, David’s latest bad stretch leads to an encounter with someone who tells him his visions may in fact be real.
Dan Stevens, Aubrey Plaza and Jean Smart were previously announced to play David, Lenny — an impossible optimist despite her rough demeanor — and a therapist. According to Deadline, Aselton joins as Amy.
Legion is one of two television series based on the the X-Men. The other, Hellfire is in development at Fox. It is unclear when either will make it to screens.