The third part of the Highland wildlife saga narrated by Ewan McGregor.It's a still, clear autumn day in Glen Affric in the north west Highlands. The forests are flushed with gold, but it's a shallow beauty that marks the beginning of the Highlands' longest, darkest and most overwhelming seasons.Animals that can't migrate to milder climes have to be equipped to deal with an all-out assault from the weather. Reindeer, ptarmigan and mountain hare are all adapted for these arctic-like conditions, but this turns out to be one of the snowiest winters in living memory, driving the animals of the Highlands to the absolute limit.