Join famed underwater explorer Dr. Robert Ballard as a rare find off the coast of Israel sends him, a team of experts, and a National Geographic crew on a quest to solve an archaeological mystery. See the oldest shipwrecks ever found in the deep Mediterranean, relive the excitement of an ancient wreck discovered by a U.S. Navy nuclear sub, and probe the secrets of these unprecedented archaeological 'time capsules' and the clues they offer to an extraordinary, ancient civilization that dates back to biblical times.