A very good movie by Ernst Lubitsch made in 1942, about a troupe of actors in Poland just after the Nazis have invaded the country. Their theater is then closed, but they become involved in espionage, and have to put their skills to a good use.
This movie is witty, though it is dark humor that makes us laugh. Lubitsch proves that yes, it is possible to laugh about concentration camps. It was Carole Lombard's last movie, she died in a plane crash before its release. A remake was made in 1983 by Mel Brooks