Knight Without Armour finds Robert Donat as a British agent, fluent in Russian, sent to spy on the revolutionary movement even before World War I started. Such things were done I'm sure as farsighted folks in the Foreign Office probably saw Europe headed for general war and Russia would have been the United Kingdom's ally in that case.
Donat plays his part all too well, he's captured as a revolutionary and sent to Siberia and spends most of World War I there. Whatever else it does it certainly helps his cover. The original revolution that brought Kerensky to power frees the political prisoners and Donat now has to try and make his way home.
In a parallel story aristocrat Marlene Dietrich gets the shock of her life when one day she wakes up and her servants have fled because the Russian Revolution has come to town. From hero{ine} to zero overnight, she's got to get out of a country that's now shooting her kind on general principles.
They become allies of convenience and of course the shared experience of escape forges a romance as well. Both turn out to be pretty clever at taking advantages of breaks as they are captured a couple of times during the film.
Robert Donat was one of the few of her leading men to not fall under Dietrich's amorous sway. But they became good friends and according to a recent biography of Marlene, Dietrich helped Donat with a special breathing technique she learned about to help control his asthma. Donat suffered from asthma all his life and it eventually killed him.
The film is based on a lesser known work of British novelist James Hilton who also wrote Random Harvest and Lost Horrizon and of course Goodbye Mr. Chips for which Donat won his Academy Award for. It seems as though Hilton wrote his books with either Robert Donat or Ronald Colman in mind for the screen, they played his heroes so well.
On screen Knight Without Armour suits the images and talents of Robert Donat and Marlene Dietrich well and fans of both will appreciate it.
