Maria Schell as Ruth Leighton

Stuart Whitman as Jim Fuller

Rod Steiger as Doctor McNally

Brenda De Banzie as Gertrude Cartwright

Donald Houston as Austin

Paul Rogers as Roy Milne

Donald Wolfit as Clive

Maurice Denham as Arnold Cartwright

Eddie Byrne as Akers

Amanda Black as Janie

Bandana Das Gupta as Inez

Harry Baird as Cole

Al Mulock as Another Convict

Anne Monaghan as Mrs. Fontaine

Marie Devereux as Ellen

Josephine Frayne as Patricia

Geoffrey Goulden as Detective

James Kent as Policeman

John Welsh as 1st Plain Clothes Officer

Russell Napier as 2nd Plain Clothes Officer