An Austrian prince flees his homeland when the Nazis take over and settles in London. He meets a beautiful Austrian émigré who makes him realize his mistake in leaving. He makes a deal with the Nazis to return in exchange for some Austrian prisoners, but discovers that the Nazis are not to be trusted.
George Brent
as Prince Kurt von Rotenberg
Martha Scott
as Marta Keller
Paul Lukas
as Baron von Helsing
Peter Cushing
as Sub-Lieutenant Blackler
Sig Arno
as Louis
Georgia Backus
as German Secretary
Edgar Barrier
as Capt. Wilhelm Ehrhardt
Don Beddoe
as Second Sailor
Nicholas Bela
as First Sailor (uncredited)
Leon Belasco
as Pierre
Roman Bohnen
as Baron Shafter
Nina Borget
as Stewardess
