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
Rex Harrison
Paul Henreid
Basil Radford
Naunton Wayne
James Harcourt
Felix Aylmer
Wyndham Goldie
Roland Culver
Eliot Makeham
Raymond Huntley
Austin Trevor
Kenneth Kent
C. V. France
Frederick Valk
Morland Graham
Adolf Hitler
David Horne
Wilfred Walter
Winifred Oughton
John Wengraf
Charles Oliver
Allan Jeayes
Albert Lieven
Wally Patch
Arthur Denton
Ian Fleming
Howard Marion-Crawford
Bryan Herbert
Irene Handl
Ben Williams
Edward Baxter
Hugh Griffith
Howard Lang
Fletcher Lightfoot
Jack May
G.H. Mulcaster
J.H. Roberts
Billy Russell
Torin Thatcher
Pat Williams