This series explores the fascinating dark side of the Ocean. Four episodes present the complete and definitive story of the worlds oceans through the prism of it's Five Deadly Forces... Ties and Currents, Pressure, Waves, and Predators. These are the Oceans unpredictable governing powers, deadly forces that have brought terror and destruction throughout history. Each episode explores a different deadly force while mapping it's awesome past and contemporary presence throughout the Pacific, Atlantic, Indian, Southern, and Arctic Oceans.