For fifteen million years orangutans roamed tropical forests from China to South East Asia. In Borneo, one of their last island outposts, lives one today who is a legend. He's won more than just a kingdom, he's won human hearts. They gave him the name Kusasi. The Orangutan King is the story of Kusasi's life told to us by a remarkable witness. Dr Birute M. Galdikas has been researching orangutans in Borneo for over 40 years. Under the guidance of Louis Leakey, Galdikas joined Jane Goodall and Dian Fossey to become a pioneer of Great Ape field research. Together they were known as the 'trimates', or 'Leakey's Angels'. Yet while Goodall's chimpanzees and Fossey's gorillas were made familiar through films, the orangutans are still largely unknown to television audiences. Their solitary lives high in the tree canopy have made them difficult to follow and film. Now, for the first time, Dr Galdikas will draw audiences deep into the orangutan universe. With enthusiasm and insight she tells us...