1. Elephants

A thousand elephants, from magnificent bulls to vulnerable orphans, come together in a crucial annual gathering in Samburu National Reserve, Northern Kenya. Using the latest satellite tracking technology a team of wildlife cameraman and scientists follow individual elephants day by day to reveal the challenges they face.

2. Caribou

Over 100,000 caribou face starving bears and wolves, deadly frozen rivers and rugged mountains, as they undertake the world’s longest land migration - 3,000 miles through the frozen Arctic wilderness of Canada and Alaska. Joining them are a team of scientist and wildlife filmmakers who, with the help of satellite tracking collars, will attempt to follow the caribou on foot as they undertake the most challenging part of their migration.