Season 3 - Episode Guide

After being credited with the first official U-Boat kill of the Second World War, German U-Boat commander Gunther Prien is abruptly recalled from patrol early and offered a secret mission to strike the Royal Navy at its home port of Scapa Flow. Fighting heavy currents and dodging blockships, Prien breaks into the anchorage, but there is not guarantee he will make it out again.

As carrier groups deliver destruction to Japanese strongholds, American subs risk everything to surface in enemy waters and rescue downed aviators. Submarines featured are the USS Skate and USS Finback. Also covered is the Finback's rescue of future U.S. President George H. W. Bush.