Walking with Dinosaurs (1999)

S01E01 New Blood

Set during the mid-Triassic era, the reign of reptiles is drawing to a close as the sun sets on their dominance. Once the preeminent lifeforms on Earth, reptiles are now dwindling in number, with only a handful of species remaining. However, as this era fades, a new group of creatures is emerging. Among them are the pioneering ancestors of a groundbreaking lineage: the dinosaurs, poised to take their place in the evolutionary narrative.