David Attenborough travels to the end of the earth, taking viewers on an extraordinary journey across the polar regions of our planet.
Looking at the Arctic and Antarctic, the greatest and least-known wildernesses of all.
Spring arrives in the polar regions, and the sun appears after an absence of five months.
Polar animals race to rear their young during times of plenty under the midnight sun.
Autumn brings epic journeys for polar wildlife as most hurry to escape the refreeze.
The story of the few extreme survivors who remain in the polar regions during winter.
What draws humans to the coldest and most hostile reaches of our planet?
David Attenborough investigates the effects of rising temperatures in the polar regions.
Special episode bringing together the very best highlights of the series.