Step back in time by 40,000 years and the world is a very different place. Vast swathes of the northern hemisphere are covered by ice sheets, glaciers carve great valleys through the landscape and continents merge as sea levels fall. Hairy beasts and ferocious predators rule, while immense animals migrate across vast, unfamiliar landscapes. With unique access to excavations and state of the art forensic analysis and spectacular CGI, Ice Age Giants travels back to a land before time with Professor Alice Roberts to reveal the Ice Age through the eyes of the animals that lived there.

Ep 3 Last of the Giants - Even after thousands of years of ice crushing the northern hemisphere and temperatures of 20 degrees lower than those of today, many of the great giants of the ice age still walked the earth. It was only when the world had warmed up again that mammoths, woolly rhinos, sabre-toothed cats and giant ground sloths finally became extinct. Professor Alice Roberts sets off on her last voyage back to the Ice Age to discover why.