This groundbreaking series exposes the ocean's most guarded secrets - the sea at its most fearsome and alluring. Our camera crew follows stories of survival against the odds, penetrate alien enviroments beyond the reach of the sun, discover ten species previously unknown to science and capture 50 other creatures on film for the first time. This gift set features the episodes: "Ocean World"; "Frozen Seas"; "Open Ocean"; "The Deep"; "Seasonal Seas"; "Coral Seas"; "Tidal Seas"; "Coasts."