The Worst Episodes of Prehistoric Planet

Deep beneath the water's surface, the world's largest predator—the Mosasaurus—lies in wait to ambush unsuspecting prey.

Director: Adam Valdez

Writer: Amber Cherry Eames

On a small island, a monumental display takes place as the giant Hatzegopteryx reveals his gentler side to woo a mate.

Director: Andrew R. Jones

Writer: Paul D. Stewart

Not many can intimidate North America's top predator, T. rex, whose size and bite are a deadly combo—except for a giant winged foe.

Director: Andrew R. Jones

Writer: Paul Thompson

Trudging through a scorching desert, two young Tarchia find relief at an oasis and encounter an adult twice their size, ready to lay claim.

Director: Adam Valdez, Andrew R. Jones

Writer: Nick Lyon

In a drought-stricken basin where much has perished, an old Pachycephalosaurus bull defends his leadership against a young challenger.

Director: Krzysztof Szczepański

Writer: Alec Ginns

A pregnant Tuarangisaurus is in distress—and her young calf can sense it—as she travels waters that are home to the ocean's deadliest predators.

Director: Adam Valdez

Writer: Paul D. Stewart

Above the deserts of North Africa, aerial combat ensues as male Barbaridactylus pterosaurs fight for the attention of females below.

Director: Adam Valdez, Andrew R. Jones

Writer: Dom Walter

With its feathered body and duck bill, the eight-ton Deinocheirus wades through an Asian wetland in search of relief from pesky biting flies.

Director: Andrew R. Jones

Writer: Paul Thompson

Within the snow-covered forest, a tense standoff develops between ancient rivals, Pachyrhinosaurus and Nanuqsaurus.

Director: Adam Valdez

Writer: Simon Bell

A journey through an underground cave in North America turns perilous when a young Triceratops is separated from its mother.

Director: Adam Valdez, Andrew R. Jones

Writer: Matthew Wright