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