In Episode 1, the dive team discover the wreck of an allied escort vessel sunk in battle forty miles off Donegal. They also discover the wrecks of the German U-boats that prowled Northern Ireland's coastline looking for targets. Meanwhile, in Derry, presenter Jules Hudson uncovers the remains of a massive US military base. And the residents of the city remember the war years, recounting their memories of life on the front line
In this episode, Jules explores how an airbase in Derry provided the vital air cover the Allies needed to win the Battle of the Atlantic. And at sea, the divers uncover the German U-boat wrecks that reveal how the battle finally swung in the Allies favour. They also find the remains of submarines sunk as part of the German surrender in Derry, and dive to the wreck of Hitler's deadliest U-boat
