Laurence Olivier was never the warmest of screen personalities, but he displays considerable charm in this pro-Soviet propaganda piece despite his unconvincing Russian accent. It seems odd to see such a British movie portraying the Soviets in such a positive light though, and it has to totally ignore their political ideology in order to do so. The supporting cast includes such familiar character actors as Felix Aylmer, Margaret Rutherford, Joyce Grenfell, George Cole and Harry Fowler.