Primatologist Dr Julie Anderson and writer/adventurer/all round rugged sort Guy Grieve continue their two-part adventure in the African rainforest, as they study one of the world's rarest and little-known species of monkey - the red-capped mangabey. Julie takes to the trees to get a primate's eye view of the world, sleeping 60-feet above the forest in a special tree hammock. Back on the ground, Guy learns more about one of the jungle's most dangerous yet threatened animals, the forest elephant. He and a local scientist get a little too close for comfort to a mother and her calf, and are forced to beat a hasty retreat as she tells them in no uncertain terms to keep their distance. Julie, meanwhile, has a rather nerve-quivering encounter with a silverback gorilla.