Walking with Monsters

Narrator:
[last lines in the series] The unique ability to stand upright, and the agility this allowed, gives the early dinosaurs a competitive edge over our four-legged mammal ancestors. Repressed by these swift killers, our ancestors are reduced to small creatures hiding in the shadows. Their time will come... [The scene cuts ahead to the Jurassic, where the dinosaurs now rule the Earth] But for the next 170 million years, the world belongs to the dinosaurs!