Neil Oliver travels back to ice age Britain as he begins the epic story of the evolution of the land and its occupants over thousands of years of ancient history. In this episode he describes a struggle for survival in a brutal world of climate change and environmental catastrophe.

Neil Oliver continues his epic story of how Britain and its people came to be. Diving for 3,000-year-old treasure and pot-holing through an ancient copper mine, he discovers how a golden age of bronze collapsed into social and economic crisis set against a period of sharp climate change and would eventually be replaced by a new era, of iron.