Alaska: Earth's Frozen Kingdom Season 1

E1: Spring

A mother sea otter nursing her fluff-ball baby through the early, chilly days of spring and black bear cubs emerge from their den.

E2: Summer

Some grizzly bears come up with an ingenious way to fatten up during the short summer months whilst a young caribou calf joins a vast herd on its huge migration.

E3: Winter

The eight month-long winter takes a grip on Alaska as we discover how life survives in 24 hours a day darkness until the sun returns.