This is a film that came out in 1940 and stars Jimmy Stewart and Margaret Sullivan.
It's a movie that I always remember as being one that stands out from many other films of 1940 because it talks about the politics in Germany at the time.
The film shows how a family breaks apart due to their political differences and affiliations.
Robert Stack co-stars as a relative who turns to the Nazi party, to the dismay of his relatives who align with the resistance. Frank Morgan plays a professor and the patriarch of the family.
Jacqueline of Another Old Movie Blog wrote a very good blog entry on this movie here.