A mute young woman is stalked by a serial killer at her uncle's mansion.
Jacqueline Bisset
as Helen Mallory
Christopher Plummer
as Dr. Joe Sherman
John Phillip Law
as Steven Sherman
Sam Wanamaker
as Lieut. Fields
Mildred Dunnock
as Mrs. Sherman
Gayle Hunnicutt
as Blanche
Elaine Stritch
as Nurse Baker
John Ronane
as Dr. Rawley
Sheila Brennan
as Mrs. Oates
Ronald Radd
as Oates
Heather Lowe
as Blind Girl
Christopher Malcolm
as Policeman
