Kawagebo (6740m), the highest mountain in Yunnan, lies in the Hengduan range.  This episode profiles the rich biodiversity of south-western Yunnan province. Forming the eastern boundary of the Himalaya, the Hengduan Mountains have buckled into a series of parallel ridges running north-south.

Madagascar, the world’s oldest island, broke off from Africa and India and has been on its own for more than 70 million years. In splendid isolation, it has evolved its very own wildlife – more than 80 per cent of it is found nowhere else. And that wildlife is quite extraordinary. In this episode, we reveal the island’s most bizarre and dramatic places, and the unique wildlife that has made its home in each, thanks to the geology and isolation of this Alice-in-Wonderland world.