Dangerous Moonlight (aka Suicide Squadron) 1941 DVD (Region 1 - Playable in North America - The US, Canada, Mexico, etc.) Black and White.
Starring: Anton Walbrook, Sally Gray, Cecil Parker.
Anton Walbrook plays a famed Polish composer who refuses to leave his homeland when the Nazis march in. His friends literally have to hoodwink him into leaving so that he will avoid extermination. Still anxious to avenge his countrymen, Walbrook joins a Polish air squadron headquartered in England. The film's romantic angle is personified by Sally Gray, an American newswoman whom Walbrook marries after a whirlwind courtship.
The film has remained etched in the collective memory of wartime filmgoers thanks to its omnipresent utilization of The Warsaw Concerto on the soundtrack.