Richard Basehart

as Joe Blake

Simone Simon

as Michele Blanchard

Josephine Griffin

as Toni Howard

Laurence Naismith

as Kurt Vorn

Sid James

as Barney West

George Baker

as Steven Marlow

Beryl Reid

as Beryl

Shani Wallis

as Shirley

Dennis Lotis

as Ronnie Baker

Philip Ray

as Mr. Bliss

Olga Lindo

as Mrs. Bliss

Jill Bennett

as Susan

John Humphrey

as Guy

Joan Hickson

as Mrs. West

David Hannaford

as Buster West

Colin Gordon

as Sir George

Bryan Forbes

as Harry

Charles Victor

as Bert

Patrick Cargill

as Cashier

Frank Williams

as Sid

Glenda Jackson

as Extra (uncredited)