Cast
Margaret Lockwood
Frances Gray
Dane Clark
Bill Casey
Anton Diffring
Officer at Station (uncredited)
Richard Marner
Soldier on Train (uncredited)
Emile Stemmler
Soldier at Station Checkpoint (uncredited)
George Benson
Sandwich Stand Customer
Sam Kydd
Customs Man (uncredited)
Ewen Solon
Enemy Scientist (uncredited)
John Horsley
Customs Officer
Eugene Deckers
Alf
Olaf Pooley
Detective-Interrogator
Michael Hordern
Lab Director Owens
Naunton Wayne
Mr. Hedgerley
Jill Balcon
Wardress (uncredited)
Gladys Henson
Attendant
John Gabriel
Night Field Telephone Officer (uncredited)
Anthony Newley
Operator (uncredited)
Ernest Butcher
Tom - Lab Assistant (uncredited)
Philo Hauser
Waiter (uncredited)
John G. Heller
Soldier at Station Check Point (uncredited)
Marius Goring
Commandant Anton Razinski
Paul Hardtmuth
Priest
Dinah Sheridan
Train Passenger at Checkpoint (uncredited)
Wilfrid Hyde-White
Mr. Luke
Patric Doonan
Customs Man
Noel Johnson
Frank Conway (uncredited)
Eric Pohlmann
Joe - the bartender