Diplodocus herds fight for mating rights, Liopleurodon patrols Jurassic seas, and a Tyrannosaurus stalks its prey across landscapes rebuilt through computer graphics and animatronics. Broadcast in 1999, the series set out to portray prehistoric animals with more scientific grounding than anything attempted on television before it, mixing paleontological fact with informed speculation about behavior nobody actually witnessed: how dinosaurs bred, hunted, migrated, and died. The production took two years to complete, combining full-scale animatronic models for close-up detail with CGI for movement and scale, a hybrid approach that was unusual for the time. Kenneth Branagh's narration treats extinct animals as if they were being filmed like any nature documentary subject, describing herd dynamics and predator strategy in the same register a wildlife series would use for lions or elephants. The result reconstructs the Mesozoic era continent by continent, era by era, betting that convincing visuals and confident narration can make animals gone for tens of millions of years feel like they were caught on camera.