Monsters Inside: The 24 Faces of Billy Milligan Episode Rating Graph

In 1977, after Billy Milligan is accused of multiple rapes near Ohio State University, experts question if he has multiple personality disorder.

Billy's troubled youth comes into focus via interviews with his siblings and childhood friends. At trial, his lawyers mount an unusual defense.

As Billy's celebrity rises, a new doctor disagrees with his diagnosis and alters his treatment. Later, Billy takes his care into his own hands.