Dangerous Moonlight

Dangerous Moonlight also known as Suicide Squadron in the USA is a 1941 British film, starring Anton Walbrook, best known for its score written by Richard Addinsell with orchestrations by Roy Douglas, which includes the Warsaw Concerto. Among the costumes, the gowns were designed by Cecil Beaton.

Some while later, Radetzky is in a London hospital, recovering from his injuries. He begins to remember his past, recalling composing the Warsaw Concerto, while Germans bomb the city, and when he first met his wife. Sitting at the piano, Radetzky sees Carole and says, Carole, its not safe to go out with you when the moon is so bright, repeating the first words he ever spoke to her.Dangerous Moonlight was produced by the British unit of RKO, which financed it. Since music was such a key element in the film, Walbrook, who was an accomplished amateur pianist, is seen playing in the film, although the music on the soundtrack is played by the professional pianist Louis Kentner. Kentners involvement was initially uncredited, as he thought that being seen to be playing film music would not help his career. He changed his mind on seeing the films success. Aerial scenes were actually filmed in combat and feature the No 74 Squadron Squadron lettering ZD Supermarine Spitfire fighters that flew in the Battle of Britain. ........

Source: Wikipedia