In the final episode of the series we go back 30,000 years to the middle of an ice age. The landscape is dominated by the mighty mammoths, living side by side with woolly rhinos, giant deer and two separate species of human. This programme follows the fate of a herd of mammoths in their annual struggle against the harsh ice age conditions. They spend every summer on the grassy plains of what will one day become the bottom of the North Sea. But every winter they are forced to head for the less exposed valleys further south. It is a journey fraught with danger as mammoths can get trapped in frozen bogs and the herd have to run the gauntlet of Ice Age hunters like cave lions and the deadly Neanderthals. Show less