
Psycho III (1986)
When Maureen Coyle, a suicidal nun who resembles Norman's former victim, Marion Crane, arrives at the motel, all bets are off and "Mother" is less than happy.
Cast

Anthony Perkins
Norman Bates

Diana Scarwid
Maureen Coyle

Jeff Fahey
Duane Duke

Roberta Maxwell
Tracy Venable

Hugh Gillin
Sheriff John Hunt

Lee Garlington
Myrna

Patience Cleveland
Sister Margaret

Juliette Cummins
Red

Katt Shea
Patsy

Brinke Stevens
Body Double

Donovan Scott
Kyle

Virginia Gregg
Norma Bates (voice)