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