Expedition: Search for the Nile S01 E02 Episode 2

Ben Fogle and Dwayne Fields conclude their documentary about the 19th-century explorers searching Africa for the source of the Nile. They pick up the story with Dr Livingstone's disappearance and how young journalist Henry Stanley was dispatched to find him, prompting the two men to team up and try to disprove one of their contemporary's theories