Walking With Beasts is an introduction to the animals (predominantly mammals) that roamed the earth from the extinction of the dinosaurs until the rise of early humans. The sequel to the BBC's acclaimed and highly successful series Walking With Dinosaurs, Beasts also uses a combination of clever special effects and computer-generated imagery to create a realistic world as it may have appeared millions of years ago. As to be expected from any BBC nature programme, the images are visually stunning; the prehistoric animals look impressively lifelike, interacting seamlessly with each other and their environment to create an entire world that could have been photographed only yesterday. Walking With Beasts has a host of little touches and flourishes that add to the feeling of realism (the animals knock over the cameras, pebbles hit the lens), which make this programme a success as a piece of pure entertainment and prehistoric escapism.