Silent Enemy

This true story of British naval officer Lieutenant Crabb in Gibraltar during World War II follows him from his beginnings as a deep sea diver to his leadership of the British naval forces against a band Italian frogmen. The Italians during the war were infamous for sabatoging the Brits by sea, but the intelligence of Officer Crabb proved to be too much for the Italian navy to handle in the end. Based on the book "Commander Crabb" by Marshall Pugh.