Chris Packham, Liz Bonnin and Steve Backshall explore our oceans and its wildlife, to find out how marine life is coping in the face of increasing environmental pressure.

In a race to find out what great pressures confront life in our ocean, the team continue their mission to investigate the effect human impact has had on our marine ecosystem.

As marine life around the world embarks on epic journeys across the planet’s oceans, we discover how ocean traffic, over-fishing and noise pollution could have an impact.

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