Polar bear

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3. Frozen Planet: Summer

Polar animals race to rear their young during times of plenty under the midnight sun.

5. Frozen Planet: Winter

The story of the few extreme survivors who remain in the polar regions during winter.

4. Frozen Planet: Autumn

Autumn brings epic journeys for polar wildlife as most hurry to escape the refreeze.

2. Frozen Planet: Spring

Spring arrives in the polar regions, and the sun appears after an absence of five months.

1. Frozen Planet: To the Ends of the Earth

Looking at the Arctic and Antarctic, the greatest and least-known wildernesses of all.

Polar Bear: Spy on the Ice

Spy cameras get closer than ever to the world's greatest land predator, the polar bear.