Cast & Crew
The story of a voyage to the bottom of the sea. Forty years ago, U.S. Navy Lieutenant Don Walsh and Swiss scientist Jacques Pickard defied the laws of science and descended seven miles to the deepest part of the Earth -- the Marianas Trench -- 35,800 feet below sea level. The dive was so risky that nobody has tried it since. This behind-the-scenes account reveals the dangers that the dive presented, how they were able to survive and the deep-sea mysteries they uncovered.