SEARCH FOR BATTLESHIP BISMARCK: 'Sink the Bismarck!' was the cry as British forces searched the Atlantic for the German navy's most powerful vessel. The pursuit ended on May 27, 1941, in a battle that plunged the Bismarck into waters nearly three miles deep, taking with it more than 2,000 lives. Almost half a century later, explorer and scientist Dr. Robert D. Ballard, discoverer of the Titanic, searches the Atlantic for the infamous Bismarck. THE SINKING OF THE BELGRANO: Act of war or war crime? This is the question that surrounded the most controversial event of the 1982 Falklands/ Malvinas War: was the Belgrano outside the Falkland Islands 'exclusion zone' and therefore immune from attack as Argentina claims? Or was it actively threatening British forces in the area? This programme journeys to find the Belgrano and tries to answer the puzzling questions about her mission, her location and her sinking on that fateful day. GALLIPOLI'S DEEP SECRETS: Dr. Ballard, discoverer of the Titanic, examines one of the greatest turning points of the 20th century, the Battle of Gallipoli. In what was to become one of the bloodiest and most futile battles of the modern era, Ballard wants to examine how it went so horribly wrong. The answers lie not only on the battlefields but beneath the waves. On this extraordinary and poignant journey, Ballard unlocks Gallipoli's deep secrets. SINKING OF THE LUSITANIA: Why on 7th May 1915, 9 months into World War 1, did a German U-Boat torpedoes the Lutisania, one of the largest luxury liners in the world. Why did it take just eighteen minutes to sink trapping nearly 1,500 passengers. Take a plunge beneath the Irish Channel and relive one of the century's most mysterious maritime tragedies.