With cutting edge tools and amazing new camera technologies, National Geographic embarks on a first-ever voyage of deep ocean exploration - thousands of feet beneath the waves - to a hidden world of new ecosystems, new species, and new wonders never seen before. This landmark 5-part series follows legendary ocean explorer and discoverer of the Titanic Dr. Robert Ballard as he travels to the deepest and most remote parts of the world's oceans in search of ancient relics and archaeological and natural wonders that have remained unseen and undisturbed for thousands of years.