Jonathan Scott narrates the extraordinary story of the leopard - the one big cat that still survives across half the world while tigers, cheetahs and lions are all struggling. By following the lives of leopard mothers and their cubs in East Africa the film investigates what it is about the natural history of these cats that makes them born survivors. Perhaps the most extraordinary revelation is that leopards are living undercover on farms and even in cities across Africa and Asia.

Since 2003, nine giant pandas from China's Wolong Nature Reserve have been reintroduced into the bamboo forest of the Qinling Mountains. Born in the breeding and research station of the reserve, they did not have close contact with humans before their relocation to the natural environment. For three years, a team of scientists followed one of them, from its birth to the discovery of its new environment.

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.