George Brent ("Hanley") and Basil Rathbone ("Oliver") work quite well together in this fast moving, if very wordy, espionage thriller. Both are charged with working together to thwart a Nazi plot to interfere with the flow of vital aircraft from the USA to Britain during WWII. It takes all of their wit and guile to discover and penetrate this highly secretive and effective ring of saboteurs, but unfortunately we don't need to do much guessing ourselves which is a shame. There is a strong supporting cast from Ilona Massey ("Carla"), Gene Lockhart ("Grenner") and the usually reliable George Zucco...