Barbara Shelley
Leonora Johnson / Leonora Brandt
Robert Ayres
Dr. Brian Marlowe
Kay Callard
Dorothy Marlowe
Ernest Milton
Edmund Brandt
John Baker
Male Nurse (uncredited)
Selma Vaz Dias
Nurse (uncredited)
Jim Tyson
Barman (uncredited)
Frank Atkinson
Guard (uncredited)
Geoffrey Tyrrell
Caretaker (uncredited)