TV Guide BBC Three Thursday

After conquering traffic, dangerous mud slides and dubious map reading, Jeremy Clarkson, Richard Hammond and James May conclude their quest to find the definitive source of the River Nile in Africa. The trio use a small raft to cross crocodile-infested waters and progress to Lake Victoria, where they hope to find a boat that will take them to the vast plains of the Serengeti. Then, after hundreds of punishing miles in their tired estate cars, the petrolheads make one final push to home in on their target

Documentary exploring how a father and son from a small town in north Wales built one of the UK's biggest underground steroid empires, selling to gym-goers around the world. Son Macaulay recalls his first experience with steroids and how his father Andrew, a former fisherman and cockle picker, was left broke, raising children alone and desperate to change his circumstances