Hell Below - Season 1 (2016)

March 1943. Two Allied convoys, HX.229 and SC.122 leave North America bound for Britain. They total nearly 100 ships carrying vital food and raw materials to supply the Allied war effort. John Gordon Luther commands the short-handed escort group charged with protecting convoy HX.229. Short at least two ships, he lacks adequate defenses for the mid-Atlantic U-boat attack that the Karl Donitz, Gross Admiral of the German Navy, has in store for them. For three days the convoys are hammered by a merciless litany of torpedo attacks and an Atlantic winter storm. Many ships ...

June, 1944. Six allied commandos spying on Japanese ship movement fall under threat when their covert operation is discovered by the enemy. Stuck in the jungles of occupied Borneo, the only hope for rescuing them is USS Harder, an American Gato Class submarine. To save the operatives, Commander Sam Dealey and his crew ply through waters guarded by a key Japanese Naval base, an act that pits the single submarine against dozens of warships. The daring rescue puts USS Harder's strength and stealth to the test.

December, 1943. Fueled by the loss of mentor and friend Dudley "Mush" Morton, Richard Hetherington O'Kane and his submarine USS Tang set out to assault Japanese shipping. In four patrols O'Kane rises to the ranks of America's top submarine commander. But in the Formosa Strait his last Mark 18 torpedo turns against him. As O'Kane's submarine meets its end, an unforgettable fight to survive begins.