Summary This is known as the Great Migration - the most breathtaking wildlife spectacle on earth. The Serengeti ecosystem supports the greatest remaining concentration of game in Africa, including more than three million large mammals. We join more than one and a half million wildebeest and hundreds of thousands of zebra on their annual pilgrimage through the plains of Tanzania. The endangered wildlife species of Africa include creatures once thought to be vermin. Believed to be a menace to farm animals, they were merciless hunted and killed, bringing their numbers close to extinction. In Africa, no other animal epitomizes this more than the wild dog. In this episode we find one of the few remaining packs in South Africa's Kruger National Park. We venture into the heat-hazed desert of the Karoo, in South Africa, to look for the forgotten town of Nieu Bethesda.

• Adventure
• Documentary