Synopsis: Based on William Harrison's biographical novel this is the tale of one of the greatest adventures of the 19th Century, the search for the source of the Nile. John Hanning Speke (Iain Glen) and Richard Burton (Patrick Bergin) lead two expeditions.The first ends in tragedy and both men are injured by tribesmen, the second takes over two years, culminates in the discovery of the source but also betrayal and death.