Before the Dinosaurs: Walking With Monsters

Many people think of the dinosaurs as the first inhabitants of the earth, but this prequel to Walking With Dinosaurs puts viewers in the midst of a host of strange creatures that inhabited the earth millions of years before the dinosaurs ever existed.

With the help of complex computer animation and the research of hundreds of paleontologists, the BBC presents an extremely realistic picture of the earth's earliest, most primitive aquatic inhabitants and chronicles their evolution to the precursors of man himself and the mighty dinosaurs.