Cast
James Mason
Richard Francis Heritage
Charles Victor
Pub Owner
Karl Stepanek
Riccardo
Anthony Dawson
2nd Code Expert
Brefni O'Rorke
Detective Inspector Burrows
Terence de Marney
Code Expert
Jack Melford
Defence Lawyer at Court Martial (uncredited)
Tom Walls
Christopher Child
Betty Warren
Fay
Walter Crisham
Charlie
Jeanne De Casalis
Lady with Dog
Patricia Medina
Mary, Manicurist (as Pat Medina)
Phyllis Stanley
Lily Bernard
David Farrar
Commander Lippinscott
Ian Fleming
Herbert Lomas
Van Driver
Hay Petrie
Waiter (uncredited)
Ronald Ward
Carter
Dennis Wyndham
George the Barman (uncredited)
Joyce Howard
Laura Verity
Edward Rigby
Mansel
George Robey
Pawnbroker
Finlay Currie
Merchant Captain
Kynaston Reeves
Naval Officer in Charge of Court Martial