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