The Invisible Man's grandson uses his secret formula to spy on Nazi Germany in this comedy-thriller.

A convicted thief in Dartmoor prison hides the location of the stolen Bank of England printing plates inside three music boxes. When the innocent purchasers of the boxes start to be murdered, Holmes and Watson investigate.

British hunter Thorndike vacationing in Bavaria has Hitler in his gun sight. He is captured, beaten, left for dead, and escapes back to London where he is hounded by German agents and aided by a young woman.