John Mills
Phillip Davidson
Acting
John McCallum
Supt. Bob Lowther
Acting
Elizabeth Sellars
Fay Lowther
Acting
Eva Bergh
Ilse
Acting
Geoffrey Keen
Craig
Acting
Michael Martin Harvey
Jackson
Acting
John Chandos
Boyd
Acting
John Slater
Pewsey
Acting
Thora Hird
Mrs Pewsey
Acting
Vida Hope
Alice Gedge
Acting
John Glyn-Jones
Gedge
Acting
Mary Mackenzie
Gladys
Acting
Harold Lang
Boyd's Chauffeur/Receptionist
Acting
John Horsley
Bletchley
Acting
Fred Johnson
Driver
Acting
Laurence Naismith
Hasbury
Acting
Peter Jones
Fisher
Acting
Christopher Beeny
Mickie
Acting
Denis Shaw
Shaw (uncredited)
Acting