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)
Ernest Butcher (Tom, lab assistant)
Gladys Henson (Attendant)
Paul Hardtmuth (Priest)
Michael Hordern (Lab Director Owens)
George Benson (Sandwich Stand Customer)
Eric Pohlmann (Joe, the bartender)
John Horsley (Customs Officer)
Patric Doonan (Customs Man)
Joan Haythorne (Judy)
Jill Balcon (Wardress)
Anton Diffring (Officer At Station Check Point)
John Gabriel (Night Field Telephone Officer)
Noel Johnson (Frank Conway, Voice)
Anthony Newley (Operator)
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)
Ernest Butcher (Tom, lab assistant)
Gladys Henson (Attendant)
Paul Hardtmuth (Priest)
Michael Hordern (Lab Director Owens)
George Benson (Sandwich Stand Customer)
Eric Pohlmann (Joe, the bartender)
John Horsley (Customs Officer)
Patric Doonan (Customs Man)
Joan Haythorne (Judy)
Jill Balcon (Wardress)
Anton Diffring (Officer At Station Check Point)
John Gabriel (Night Field Telephone Officer)
Noel Johnson (Frank Conway, Voice)
Anthony Newley (Operator)
A lady entomologist in a Balkan country is suspected of spying, but manages to outwit her enemies.(40 pictures)
