Episode 1

In the world's largest ocean, one mighty current brings the Pacific to life in astonishing ways, from enriching rainforests to sustaining coral reefs.

Episode 2

From the minute mantis shrimp to the mighty sperm whale, inhabitants of the tropical Indian Ocean use their ingenuity to find food and raise their young.

Episode 3

In the choppy, unpredictable Atlantic Ocean, fish and mammals must face down predators and navigate the fast-changing climate in order to survive.

Episode 4

With temperatures mounting and sea ice melting, the creatures of the Arctic Ocean must go to new extremes to survive in a new, warmer world.

Episode 5

In the most remote ocean on Earth, the Global Ocean Current is at its most powerful — and its cold waters are home to some extraordinary species.