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