S01E01 Mountains
Only the hardiest of beasts survive in Britain's mountains and uplands, including the golden eagle and its prey the mountain hare, plus 400,000 red deer and flamboyant black grouse.
On North Ronaldsay, one rare breed of sheep can subsist on a diet of only seaweed. In the Shetlands, otters benefit from a current of warm water flowing up from Spain.
Wildlife documentary series narrated by Hugh Bonneville revealing the hidden lives of the animals that live in various habitats around Britain.