Blue Planet Now

In Mexico, Chris pairs up with scientists at the world's biggest whale nursery to witness the arrival of gray whale mothers and their babies. Steve drops anchor in the Bahamas to take the plunge with some enormous ocean predators, including tiger sharks.

As the sun rises over the Great Barrier Reef, Liz joins scientists to find out how temperature increases are impacting the reef and how plastic is putting the future of the planet's turtles at risk.

Steve, Chris and Liz join scientists to further understand the importance of migrations, long and short, and understand how human demands on the oceans have made an impact on these wild journeys.

Steve, Chris and Liz look to understand what the future holds for all life within our blue planet and the extraordinary efforts scientists are making to protect our seas. In Mexico, Chris searches for the iconic humpback whale.