Barbara Shelley as Leonora Johnson / Leonora Brandt

Robert Ayres as Dr. Brian Marlowe

Kay Callard as Dorothy Marlowe

Ernest Milton as Edmund Brandt

Lily Kann as Anna

Jack May as Richard Johnson

Paddy Webster as Cathy

John Lee as Allan

Edward Harvey as Doorman

Martin Boddey as Cafferty

Selma Vaz Dias as Nurse

John H. Watson as Roberts

John Baker as Male Nurse (uncredited)

Selma Vaz Dias as Nurse (uncredited)

Jim Tyson as Barman (uncredited)

Frank Atkinson as Guard (uncredited)

Geoffrey Tyrrell as Caretaker (uncredited)