Chris Packham and Michaela Strachan are live from the wilds of Scotland, deep in the Cairngorms National Park and surrounded by Caledonian pine trees. Gillian Burke has been on the trail of a surprising winter insect spectacle, whilst Iolo Williams is hoping to track down one of Scotland's rarest and most iconic mammals, the wildcat. The team also looks at the Cairngorm Mountains through the eyes of one of its most famous literary residents, Nan Shepherd, who brought the area to life in her book The Living Mountain.