Venetia Baker as Sister Mary Bonaventure

Anita Hill as Sarah Carn

Doreen Atkinson as Sister Josephine

Kay Russell as Mother Superior

Edward Hood, Jr. as Willy Pentridge

John King as Dr. Jeffreys

Marianne Van-de-Core as Nurse Phillips

Elizabeth Brooker as Nurse Brent

John Lynn as Melling, the Policeman

Eileen Banfield as The Policewoman

Ivy Oborne as Martha Pentridge