Prof. Carl Mason — He Knows You're Alone Character Profile

About Prof. Carl Mason

Amy's philosophy professor who is secretly having an affair with Joyce. He investigates a power outage at his home and discovers Joyce's body, only to be immediately stabbed and killed by the killer.

Character Facts

Played by

James Rebhorn

Appears in

He Knows You're Alone (1980)

Role

Supporting

More characters from He Knows You're Alone

• Marvin (Don Scardino)
• Amy Jensen (Caitlin O'Heaney)
• Nancy (Elizabeth Kemp)
• Ray Carlton (Tom Rolfing)
• Det. Frank Daley (Paul Gleason)
• Det. Len Gamble (Lewis Arlt)
• Joyce (Patsy Pease)
• Girl in Car (Debbie Novak)
• Gamble's Bride (Dorian Lopinto)
• Boy in Car (Russell Todd)
• Ruthie (Robin Lamont)
• Phil (James Carroll)