The Mekong is Southeast Asia's greatest river, the ‘Mother of Water’ that brings life to millions of people from the paddy fields of Vietnam to the mountains of the Tibetan Plateau. In this series, Sue Perkins goes on an extraordinary journey, spanning nearly 3,000 miles, to explore lives and landscapes on the point of enormous change. Across four episodes, she travels upstream through Vietnam, Cambodia, Laos and China, towards the Mekong's source high in the Himalayan glacier.