The Spy in Black
Starring Conrad Veidt, Sebastian Shaw, Valerie Hobson, Marius Goring, June Duprez, Athole Stewart, Agnes Lauchlan, Helen Haye, Cyril Raymond, George Summers
It's a war and thriller movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Germany.