A BBC Studios Natural History Unit Production co-produced with BBC America, ZDF and France Télévisions for BBC

Cinematographers: John Aitchison, Barrie Britton, Vladimir Filippov, Moritz Katz, Sergey Kolchin, Henry M Mix, Didier Noirot, Sam Oakes, Jacky Poon, Stas Tolstnev

Every year, the northern half of Asia is transformed by snow and ice. Here, an array of remarkable creatures defy some of the harshest conditions on Earth. Amidst relentless extremes, life not only endures, but flourishes in extraordinary ways.