S1, E2: Following a wildebeest calf making a spectacular year-long journey, an arduous 3,000km round trip across Tanzania's Serengeti and Kenya's Masai Mara, filmed using Dungcam, Bouldercam, Croccam, Skullcam, Tortoisecam and other spycams. The migration reaches the Masai Mara where, for the calf, the river presents his greatest challenge yet.