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