How Awful About Allan (1970) is a suspenseful psychological thriller starring Anthony Perkins as Allan, a troubled man suffering from psychosomatic blindness after a tragic fire killed his father and scarred his sister. Released from a mental institution, Allan returns home only to become increasingly convinced that a mysterious boarder is stalking him, blurring the line between paranoia and reality. As guilt, family secrets, and unsettling whispers close in, Allan must uncover the truth before his fragile grip on sanity slips away.