Specials — Episode 3

Planet Earth: Extreme Journeys

This original special features all the remarkable stories of global animal migrations filmed for "Planet Earth" gathered in a single show for the first time. Learn why animals need to move and find out about the vast distances they cover and how they never give up.

The need to travel produces some of nature's most amazing feats and spectacles: vast herds of caribou in Alaska, the challenges of the wildebeest in Kenya and the incredible flight of the demoiselle cranes across the Himalayas. Plus, the incredible journey of a humpback whale and its baby across the oceans in their search for food in the rich waters of the polar seas.