Episode 2

S1 E2: Jules Hudson explores how an airbase in Derry-Londonderry provided the vital air cover that the Allies needed to win the Battle of the Atlantic. At sea, the divers uncover the German U-boat wrecks that reveal how the battle finally swung in the Allies' favour, locate the remains of submarines sunk as part of the German surrender and dive to the wreck of Hitler's deadliest U-boat.