The Killing Tide

It was the U-boat submarine that spearheaded the German attempt to destroy the allied war effort, and they very nearly succeeded - over 3,500 allied ships bringing vital supplies from the United States and Canada to Europe were lost to their fire power. The programme follows a team of divers and historians as they explore the U-boat wrecks which have remained untouched for nearly 70 years, telling the stories of the U-boat war - the key events, the heroes and villains, and the changing tide of technological advances. Motion graphics, moving first-hand testimony and detailed expert analysis brings the most important battle of World War Two back to life.