The hot weather is having a draining effect on woolly mammoth Martha. Nigel prescribes a haircut before heading back 135 million years to prehistoric China in search of a winged dinosaur called Microraptor.

Disaster strikes when a pack of vicious dinosaurs called Mei Long ambush the team. But Nigel continues and locates the Microraptors, following a herd of enormous Titanosaurs forging a path through the forest en route to their egg-laying sites. A volcanic eruption forces Nigel to rescue not only the Microraptors, but the huge Titanosaurs too.

Back at the park, the two T-rex are separated after a territorial scuffle — but there's good news when one of the Ornithomimus lays a clutch of eggs. The park is going to have its first babies!