SECRETS OF THE TITANIC This National Geographic exclusive, narrated by Martin Sheen, highlights the century's most celebrated underwater expedition. After years of research and exploration, Dr. Robert Ballard of Woods Hole Oceanographic Institution and a team of researchers located the final resting place of the ill-fated S.S. Titanic, nearly two-and-one-half miles beneath the surface of the icy Atlantic. Armed with sophisticated equipment, including the submersible deep-sea-craft Alvin and a myriad of remote video cameras, Dr. Ballard and his team became the first humans to see and photograph the Titanic since its sinking more than 85 years ago. Now the breathtaking footage of this exploration, as well as the intriguing story of the ship's discovery, is presented in its entirety. SEARCH FOR THE 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, who discovered the sunken S.S. Titanic, searched the Atlantic for the infamous Bismarck. On June 8, 1989, he located the sunken ship, 600 miles off the coast of France. National Geographic looks back at the first - and last - mission of the Bismarck and talks with survivors of the notorious World War II battle. Then, in its climactic chapter, SEARCH FOR THE BATTLESHIP BISMARCK reveals exclusive footage of this remarkable undersea exploration. THE LOST FLEET OF GUADALCANAL In 1942, World War II raged around a previously obscure island in the southwest Pacific called Guadalcanal. Six months of savage fighting transformed the channel north of the island into a final resting place for some fifty Allied and Japanese warships. Fifty years later, Dr. Robert Ballard, the explorer who found the wrecks of the Titanic and Bismarck, leads a joint National Geographic Society/U.S. Navy expedition to explore this watery graveyard. Join in his discovery of ships unseen for half a century! Retrace the brutal events at Guadalcanal that changed the course of the war. Share the vivid, searing memories of those who fought and survived, and witness their touching reunions with their ships and former enemies. And experience the excitement and life-threatening dangers of undersea exploration. With a special introduction by former President Bush, relive some incredible moments in the histories of war and exploration as you discover THE LOST FLEET OF GUADALCANAL.