It’s a wonder-filled environment that covers seven-tenths of the Earth’s surface, but one that few people get to see close up. This sprawling BBC documentary series, produced over five years, takes viewers around the world to explore this undersea kingdom and the varied and unusual creatures who call it home. Narrated by David Attenborough and Pierce Brosnan.

8 episodes on 3 discs. 6 1/2 hrs. Widescreen; Soundtrack: English Dolby Digital 5.1; Subtitles: English (SDH); featurette; interviews; more.