Kadro (40)
Margaret LockwoodFrances Gray
Dane ClarkBill Casey
Marius GoringCommandant Anton Razinski
Naunton WayneMr. Hedgerley
Wilfrid Hyde-WhiteMr. Luke
Eugene DeckersAlf
Olaf PooleyDetective-Interrogator
Gladys HensonAttendant
Paul HardtmuthPriest
Michael HordernLab Director Owens
George BensonSandwich Stand Customer
Eric PohlmannJoe - the bartender
John HorsleyCustoms OfficerPatric DoonanCustoms ManJoan HaythorneJudy
Jill BalconWardress (uncredited)Hyma BeckleyCafé Mimosa Patron (uncredited)John BoxerPolice Sergeant at Customs Café (uncredited)
Ernest ButcherTom - Lab Assistant (uncredited)Daniel BrownTrain Passenger (uncredited)
Robert CawdronSoldier at Station Checkpoint (uncredited)
Anton DiffringOfficer at Station (uncredited)Toni FrostStewardess (uncredited)John GabrielNight Field Telephone Officer (uncredited)Charles HammonTrain Passenger in Platform Line-up (uncredited)Philo HauserWaiter (uncredited)
John G. HellerSoldier at Station Check Point (uncredited)
Noel JohnsonFrank Conway (uncredited)
Sam KyddCustoms Man (uncredited)
Richard MarnerSoldier on Train (uncredited)Louis MattoCafé Mimosa Waiter (uncredited)
Anthony NewleyOperator (uncredited)Michael RittermanThe ‘Tail’ (uncredited)Lance SecretanAlan (uncredited)
Dinah SheridanTrain Passenger at Checkpoint (uncredited)
Ewen SolonEnemy Scientist (uncredited)Emile StemmlerSoldier at Station Checkpoint (uncredited)Robert VosslerDay Sentry at First Checkpoint (uncredited)John WilderCustoms Officer (uncredited)Billy WilmotCafé Mimosa Customer (uncredited)