In the third episode, a Velociraptor hunts pterosaurs on a cliffside by a waterfall. A battle-scarred Tyrannosaurus nurses his wounds and encounters a newcomer. With its feathered body and duck bill, the eight-ton Deinocheirus wades through an Asian wetland in search of relief from pesky biting flies.
A female Quetzalcoatlus builds and guards her nest. A mother Masiakasaurus and her family hunt crabs. Elasmosaurs enter an estuary in search of fish.

Travel back 66 million years to when majestic dinosaurs and extraordinary creatures roamed the lands, seas, and skies in the second season of this acclaimed series narrated by David Attenborough.
After a tropical storm, two Zalmoxes find themselves in a rafting event. On a small island, a monumental display takes place as several Hatzegopteryx ambush a herd of Tethyshadros. A female Majungasaurus hunts a group of Simosuchus. A mother Adalatherium raises her offspring in a burrow, hoping to keep them safe from predators like Masiakasaurus and Madtsoia. A pack of Imperobator pursue a Morrosaurus onto a frozen lake. A male Hatzegopteryx attempts to attract a mate.

Pterosaur hatchlings take flight to leave their island sanctuary, but are targeted by several Shamosuchus. Several Austroraptor hunt garfish and contend for the best fishing spots. A male Beelzebufo attempts to attract a mate, but his endeavor is interrupted by a herd of Rapetosaurus. A male Pachycephalosaurus must put an upstart youngster in his place. Two Tyrannosaurus brothers hunt Edmontosaurus under the cover of darkness.