WWII: Hell Under the Sea

December 1943. Fuelled by the loss of mentor Dudley "Mush" Morton, Richard Hetherington O'Kane and his submarine USS Tang set out to assault Japanese shipping. (S1, ep 2) 7+

June, 1944. Six allied commandos spying on Japan's merchant ships fall under threat when their covert operation is discovered by the enemy. (S1, ep 3) 7+

July 1940. In the North Atlantic, a British escort pins down one of Germany's top U-boat captains. Otto Kretschmer and crew face a barrage of underwater bombs. 7+

Following the Japanese assault on Pearl Harbor, five Nazi U-boats set out to attack ships off the shores of the United States to thwart the American war effort. 7+

In 1943, two Allied convoys carrying vital supplies for the war effort set out for Britain. What followed was the largest convoy battle of the Second World War.