Czechoslovakia, March 1939, on the eve of World War II. As the German invaders occupy Prague, inventor Axel Bomasch manages to flee and reach England; but those who need to put his knowledge at the service of the Nazi war machine, in order to carry out their evil plans of destruction, will stop at nothing to capture him.
Margaret Lockwood
as Anna Bomasch
Rex Harrison
as Gus Bennett
Paul Henreid
as Karl Marsen
Basil Radford
as Charters
Naunton Wayne
as Caldicott
James Harcourt
as Axel Bomasch
Felix Aylmer
as Dr. Fredericks
Wyndham Goldie
as Dryton
Roland Culver
as Roberts
Eliot Makeham
as Schwab
Raymond Huntley
as Kampenfeldt
Austin Trevor
as Capt. Prada
