For the final Autumnwatch, Chris and Kate are in the Cairngorms to witness winter's arrival. These mountains in Scotland are home to ptarmigan, mountain hares and stoats - all of which perform one of nature's greatest tricks: they turn white, helping them blend in with their wintry surroundings.
Simon King is in the company of rooks, as thousands gather in a spectacular winter roost in a small patch of woodland in Norfolk.
Gordon Buchanan is on the trail of his own seasonal wildlife story, and Martin Hughes-Games shows how to look after garden birds this winter.
