The oceans cover 70 percent of the planet and contain 90 percent of life on earth, yet they remain the most treacherous and alien part of our environment. Vast, chaotic storms can unleash almost inconceivable power.
Cameras follow technical experts as they investigate why oceanic events happen.
Meet communities that depend on the sea and people who live in amazing circumstances, such as commercial fishermen who have one of the riskiest jobs on earth. The series goes on to look to the future, and to undersea mysteries we have only begun to unravel. On the aptly named Cape Disappointment off the Pacific coast, ships can be literally torn apart by the surf. There, young U.S. Coast Guard students are put to the test in the deadly waves and spray. In China, the Black Dragon is a terrifying tidal bore that roars upriver at heights of up to 20 feet.