The Worst Episodes of Our Planet

Be it buffalo, polar bears, humpback whales or albatross chicks, migration is a vital survival strategy for animals to feed, reproduce and find homes.

Director: Toby Nowlan

Writer: N/A

As summer spreads across our solar-powered planet, honey bees toil, snow geese breed, tadpoles awaken and lions stalk wildebeest in search of lush grass.

Director: Ed Charles

Writer: N/A

As snow geese, antelope, army ants and gray whales dodge predators and pollution, get a closer look at how the modern world impacts animal migration.

Director: Ed Charles

Writer: N/A

From fearsome sharks to lowly urchins, 90 percent of marine creatures live in coastal waters. Protecting these habitats is a battle humanity must win.

Director: Hugh Pearson

Writer: N/A

Cameras follow desert elephants seeking sustenance, bison roaming North America grasslands and caterpillars living the good life underground.

Director: Adam Chapman

Writer: N/A

The need for fresh water is as strong as ever. However, the supply is becoming increasingly unpredictable for all manner of species.

Director: Mandi Stark

Writer: N/A

Left to fend for themselves until they find their footing, baby sea turtles, elephant seal pups, pumas and crabs bravely trek towards adolescence.

Director: Toby Nowlan

Writer: N/A

Witness the planet's breathtaking diversity -- from seabirds carpet-bombing the ocean to wildebeests eluding the wild dogs of the Serengeti.

Director: Adam Chapman

Writer: N/A

Venture into the deep, dark and desolate oceans that are home to an abundance of beautiful -- and downright strange -- creatures.

Director: Hugh Pearson

Writer: N/A

On the unforgiving frontier of climate change, polar bears, walruses, seals and penguins find their icy Edens in peril.

Director: Sophie Lanfear

Writer: N/A

Jungles and rainforests are home to an incredible variety of species like preening birds, intelligent orangutans and remarkable ambitious ants.

Director: Huw Cordey

Writer: N/A

Examine the fragile interdependence that exists between forests' wide variety of residents, including bald eagles, hunting dogs and Siberian tigers.

Director: Jeff Wilson

Writer: N/A