Walking with Monsters (also distributed as Before the Dinosaurs - Walking with Monsters or Walking with Monsters - Life Before Dinosaurs) is a three-part British documentary film series about life in the Paleozoic, and briefly into the Mesozoic, bringing to life extinct arthropods, fish, amphibians, synapsids, and reptiles. As with previous Walking with... instalments, it is narrated by Kenneth Branagh. Using state-of-the-art visual effects, this prequel to Walking with Dinosaurs shows an epic 300 million year war between creatures before the dinosaurs. The series draws on the knowledge of over 600 scientists and depicts Paleozoic history, from the Cambrian Period (530 million years ago) to the Early Triassic Period (248 million years ago). It was written and directed by Tim Haines. As wit