Director
Roy Ward Baker
DIRECTOR
Stars (in credits order)
Margaret Lockwood
Frances Gray
Dane Clark
Bill Casey
Marius Goring
Commandant Anton Razinski
Naunton Wayne
Mr. Hedgerley
Wilfrid Hyde-White
Mr. Luke - British consul
Eugene Deckers
Alf - the 'contact'
Olaf Pooley
Detective-Interrogator
Gladys Henson
Snack Bar Attendant
Paul Hardtmuth
Priest
Michael Hordern
Owens - Lab Director
George Benson
Sandwich Stand Customer
Eric Pohlmann
Joe - the bartender
John Horsley
Customs Officer
Patric Doonan
Customs Man
Joan Haythorne
Judy
Jill Balcon
Wardressuncredited
Hyma Beckley
Cafe Mimosa Patronuncredited
John Boxer
Police Sergeant at Customs Cafeuncredited
Daniel Brown
Train Passengeruncredited
Ernest Butcher
Tom - lab assistantuncredited
Robert Cawdron
Soldier at Barrier During Fireuncredited
Anton Diffring
Officer At Station Checkpoint.uncredited
Toni Frost
Stewardessuncredited
John Gabriel
Night Field Telephone Officeruncredited
Charles Hammond
Train Passenger in Platform Line-upuncredited
Philo Hauser
Waiteruncredited
John G. Heller
Soldier at Station Check Pointuncredited
Noel Johnson
Frank Conwayuncredited
Sam Kydd
Customs Manuncredited
Richard Marner
Soldier on Trainuncredited
Louis Matto
Cafe Minosa Waiteruncredited
Anthony Newley
Operatoruncredited
Michael Rittermann
The 'Tail'uncredited
Lance Secretan
Alanuncredited
Dinah Sheridan
Train passenger at checkpointuncredited
Ewen Solon
Enemy Scientistuncredited
Emile Stemmler
Soldier at Station Checkpointuncredited
Robert Vossler
Day Sentry at 1st Checkpointuncredited
John Wilder
Customs Officeruncredited
Billy Wilmot
Café Mimosa Customeruncredited