This one's an oddity. It feels as if it had some potential, with a sound start and development, but then the finale feels so rushed, it's almost as if they could see that the war was about to start and they needed to get the shoot finished before everything went crazy. Niven has never been more charming and De Havilland never more luminously beautiful, but it doesn't make the film entertaining enough, except as a historical document. Definitely only for students of film history.