This landmark David Attenborough series presents the most comprehensive portrait of the natural world ever seen on television. To produce it, camera teams journeyed for three years from high Himalayan valleys to the depths of the ocean; from the sands of the Sahara to the humid jungles of Borneo. Everywhere they travelled they chronicled the many different ways that animals and plants have evolved in order to defend themselves against the elements - and often - one another.

Episode 1: The Building of the Earth
Episode 2: The Frozen World
Episode 3: The Northern Forests
Episode 4: Jungle
Episode 5: Seas of Grass
Episode 6: The Baking Deserts
Episode 7: The Sky Above
Episode 8: Sweet Fresh Water
Episode 9: The Margins of the Land
Episode 10: Worlds Apart
Episode 11: The Open Ocean
Episode 12: New Worlds