The team investigates why parts of the Southern Ocean are warming twice as fast as the rest of the world's oceans and looks at the impact of this phenomenon.

The team explores the remote and unexplored Southern Red Sea, teeming with marine life and home to some of the warmest waters on the planet.

The team explores a corner of the Atlantic Ocean. This ocean is the youngest of the great oceans and critical in influencing our climate.

In the first of two episodes in the rich tropical waters of the Indian Ocean, the team explore its remote and pristine underwater worlds.

The team explores the coastal waters of the Indian Ocean to discover what happens when the powerful Indian Ocean collides with the edge of a continent.

The team embarks on an expedition to explore the profound effect that man is having on the Mediterranean Sea. Western civilisation developed around its shores, but now human activity is threatening to destroy it.

The team ventures into one of the world's most hostile environments, the Arctic Ocean, which plays a crucial role in controlling our climate.