James Mason

Character: Richard Francis Heritage

Joyce Howard

Character: Laura Verity

Tom Walls

Character: Christopher Child

Phyllis Stanley

Character: Lily Bernard

Edward Rigby

Character: Mansel

Ronald Ward

Character: Carter

David Farrar

Character: Commander Lippinscott

Karl Stepanek

Character: Riccardo

Betty Warren

Character: Fay

Walter Crisham

Character: Charlie

Jeanne De Casalis

Character: Lady with Dog

Patricia Medina

Character: Mary, Manicurist (as Pat Medina)

George Robey

Character: Pawnbroker

Ronald Chesney

Character: Max - Mouth Harmonica Player

Peggy Dexter

Character: Bobby

Finlay Currie

Character: Merchant Captain

Brefni O'Rorke

Character: Detective Inspector Burrows

Eric Mason

Character: Benson - Illusionist

Anthony Holles

Character: Hotel Hairdresser

Ian Fleming

Character:

Kynaston Reeves

Character: Naval Officer in Charge of Court Martial

Herbert Lomas

Character: Van Driver

Percy Walsh

Character: Police Sergeant

Terence de Marney

Character: Code Expert

Elizabeth Flatau

Character:

Charles Victor

Character: Pub Owner

Robert Sansom

Character: Petty Officer Bill Grant

Alvar Liddell

Character: Boothby - Radio Announcer

Anthony Dawson

Character: 2nd Code Expert

Alf Goddard

Character: One of Mansel's Tough Friends (uncredited)

David Keir

Character: Henry (uncredited)

Jack Melford

Character: Defence Lawyer at Court Martial (uncredited)

Hay Petrie

Character: Waiter (uncredited)

Leonard Sharp

Character: Bus Conductor (uncredited)

Dennis Wyndham

Character: George the Barman (uncredited)