3/3. Professor Alice Roberts goes on the trail of the great beasts of the ice age. As the world warmed up again, many species became extinct. Alice finds out why. Also in HD. [S,AD]
2/3. Professor Alice Roberts goes on the trail of the great beasts of the Ice Age. This time she visits Europe and Siberia, which were hit hardest by the cold. Also in HD. [S,AD]
1/3. Professor Alice Roberts goes on the trail of the great beasts of the Ice Age, beginning in North America - the hunting ground of the sabre-toothed cat. Also in HD. [S,AD]