This is a fascinating film, with a great cast (and some wonderful supporting players, such as Cesar Romero as Tito Del Val the Italian provisional representative. The film with keep you wondering just what is going to happen next, and Ms. Francis is wonderful as the conflicted Elena. She and Howard are quite good together. though I believe this is the only time they appeared together on film (though they did the radio show Screen Guild Theatre together in 1939 (Never Of This World).
It's also interesting to see this somewhat sympathetic view of Lenin in 1939. This surely is NOT a pro-Communist film, but, as you will see at the end, Lenin is vindicated. So, anti-Communist - perhaps, but with a bit of a balance. Here's a trailer for this excellent movie: