2. Cambodia

Sue Perkins continues her epic journey up the Mekong. In Cambodia, animal lover Sue is confronted by the most emotionally challenging and complex world of wildlife trafficking.

3. Laos

Sue Perkins continues her journey up the Mekong, south east Asia's greatest river. She reaches Laos, one of the poorest and least developed of the nations the Mekong flows through.

4. China

Sue Perkins's journey up south east Asia's greatest river concludes as she reaches China. She travels through Yunnan province to the Tibetan Plateau, home of the Mekong's source.