From the vast Gobi Desert to the jungles of Borneo, and from the polar wilderness of Siberia to the coral seas of the Indian Ocean, showcasing the breath-taking variety of Asia's wildest places.

Sir David Attenborough unveils the two stunning underwater realms of Saudi Arabia - the flamboyant Red Sea and the contrasting hot muddy Gulf, capturing for the first time the rare event of Palolo worms spawning at night.