Storyline:
Each 50 minute episode features a global overview of a different biome or habitat on Earth (Polar, Mountain, Cave, Desert, Plains, Fresh Water, Seas, Ocean, Forest), followed by a ten-minute featurette which takes a behind-the-scenes look at the challenges of filming the episode.

Cast:
David Attenborough (as Himself - Narrator), Sigourney Weaver (as Narrator - US Version)