This mini-series, featuring 4 episodes, looks at the far-reaching underwater world of submersibles. THE HIDDEN THREAT serves as an introduction to the submarine and the life the submariner leads. SUBMARINERS offers a “day in the life” of a submariner and profiles the amazing teamwork constantly performed, particularly in the nuclear sub, where safety is of vital importance. THE HUNTER AND THE HUNTED outlines the true history of the submarine and wartime strategies with the assistance of well-known German U-Boat commanders, their British counterparts and American veterans. IN THE BELLY OF THE BEAST reveals a history of submarines and a basic overview of submariner emergency and weapons training in the United States, Russia and the United Kingdom.