Blue Planet Live

This first episode celebrates the amazing and diverse wildlife living in the seas around us, as Chris pairs up with scientists at the world's biggest whale nursery in Mexico. As around 300 mothers and calves arrive we gain a unique view of this spectacle from the air, and discover in real time how their condition and the population is faring.

As the sun rises over the Great Barrier Reef, Liz Bonnin joins scientists live to find out how temperature rises are impacting the reef, and how plastic is putting the future of the planet's turtles at risk. In a dramatic manoeuvre to capture coral spawning, we follow an ambitious attempt to restore the reef through IVF.

Liz joins scientists on the Great Barrier Reef to witness baby turtles taking their first steps and carries out a live weigh in on young shearwater chicks. Steve finds himself surrounded by stingrays as a team attempt to ultrasound some pregnant females, and over in Mexico's Seat of Cortez, Chris hooks up with whale experts in search for the return of a long lost visitor to these waters, the sperm whale.

In the final programme of this week-long ocean health check, we look to the future to find out what it could hold for the next generation of marine life and how we can help.

The team looks at how scientists across the world are embracing technology to find solutions to the pressures faced by wildlife at sea.