Chris Packham, Michaela Strachan and Martin Hughes-Games broadcast from their base in the Cairngorm Mountains, where they reveal the winter survival strategies of the UK's wildlife. The team catches up with the golden eagles, red deer and pine martens in the area, and look at how garden birds around the country are coping with this challenging season. Martin Hughes-Games braves the icy waters of the River Dee, as he explores the watery home of otters and dippers.