Walking with Dinosaurs Episode 1 - New Blood Episode Title:New Blood.Episode Description:A female Coelophysis is shown stalking a herd of dicynodonts called Placerias (a giant synapsid or mammal-like reptile), looking for weak members to prey upon. A male Thrinaxodon is shown downstream, returning to his burrow from the river. The last focus of the episode is a female rauisuchian Postosuchus (one of the largest carnivores alive in the Triassic) who is first shown attacking a Placerias herd and bites one of the members, driving the rest of the herd to retreat and leave the wounded and weakened member of the group to the carnivore.