Season 1

Embarking on an epic journey for food, a mother whale leads her calf on the longest migration of any mammal.

2023-04-21

A four-ton elephant seal returns to his breeding beach on the cusp of summer—and quickly learns the competition for females is fierce.

2023-04-21

In the Brazilian Pantanal—a wetland larger than England—a six-foot otter attempts to raise her cubs in the shadow of hungry jaguars.

2023-04-28

Makumba is one of the best studied gorillas in the world. Now past his prime, he must find new ways to maintain his status as king of the jungle.

2023-05-05

In Earth's largest inland delta, Africa's deadliest mammal fights to keep his family afloat as the dry season approaches.

2023-05-05

Rocky Mountain summers are fleeting, leading local bears to gain weight, sharpen defenses, and engage in a dynamic fight for domination.

2023-05-05

A blazing sun scorches the African savanna, where the planet's biggest bird protects his eggs and giraffes struggle to fuel their towering bodies.

2023-05-12

In Borneo, apes and monkeys train their babies in the treetops, but with gravity against them, the stakes are high—and crocodiles lurk below.

2023-05-12

Monsoon season drives giants toward higher ground, and big cats battle it out to claim dwindling territory in an Indian valley.

2023-05-19

Subzero temperatures force polar bears to bulk up—but as summer returns and the planet grows warmer, they find themselves on thin ice.

2023-05-19