Hell Below - Season 1 (2016)

They traveled alone and in packs. They collected intelligence and launched attacks. They rose above the ocean depths and ultimately changed the course of war. Chart some of the most dramatic and influential submarine patrols of World War II, from the perspective of the naval masterminds who plotted the strategies to the tenacious and aggressive commanders who carried them out. Follow the ongoing challenges the Axis and Allies faced as they pushed the limits of their vessels in pursuit or in escape.