S1, E1: Spring arrives in the lands of the North, and as the weather begins to change, so too do the movements of the animals who call the northern edges of Scotland, Iceland, and Norway home. Narrated by award-winning actor Ewan McGregor, we follow the creatures as they wake from "the great darkness" and face the challenges ahead, from an Arctic fox searching for his mate after a long hibernation to a mother otter desperate to keep her new family together to a large reindeer migration battling through a blizzard to find a place to give birth.