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Hell Below

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.

Part 1 The Wolfpack

The wolfpack tactic was made famous by Admiral Karl Donitz, Hitler's mastermind of submariners. His strategy to send teams of U-boats to bear against the convoys of ships heading from Canada to Britain, cut maritime lifelines, and starve the enemy into defeat. Take a deep dive into the North Atlantic as we go above and below sea level to relive one of the first attacks of Donitz's lethal subs in 1940, headed by leader of the pack Commander Otto Kretschmer. Then follow Britain's war strategists as they race to combat this new deadly attack.

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