Oceans

Revealing the hidden stories of the deep, a team of four marine experts voyaged across the globe to explore our planet's last true wilderness - its oceans. Paul Rose, Philippe Cousteau Jr, Dr Lucy Blue and Tooni Mahto explore how a unique ocean paradise is under threat. They investigate how the Humboldt squid is invading the sea and carry out pioneering science on the 20-metre long sperm whale.

The team investigate why parts of the Southern Ocean are warming twice as fast as the rest of the world's oceans, and take a look at the impact of this phenomenon. They also go in search of the weedy sea dragon, and explore kelp forests to investigate how they're threatened. Plus, the team dive one of the thousand shipwrecks in these waters, and in a sunken valley, they search for mysterious deep ocean creatures.

The team explore the remote Southern Red Sea, teeming with marine life and home to some of the warmest waters on the planet. With unique access, expedition leader Paul Rose, environmentalist Philippe Cousteau Jr, maritime archaeologist Dr Lucy Blue and marine biologist and oceanographer Tooni Mahto investigate whether the vibrant coral here can help other coral reefs threatened by global warming.

The team explores a corner of the Atlantic Ocean. This ocean is the youngest of the great oceans and critical in influencing our climate. The team make a dangerous dive into a `black hole' to discover how different our planet's earliest oceans were 3.5 billion years ago.

In the first of two episodes in the rich tropical waters of the Indian Ocean, the team explores its remote and pristine underwater worlds. The team investigates how schools of manta ray suffering from shark bites are treated by the inhabitants of a remarkable reef, and they go in search of one of the Indian Ocean's most elusive creatures, the dugong.

The team explores the coastal waters of the Indian Ocean to discover what happens when its power collides with the edge of a continent. The team also search for one of the ocean's most mysterious creatures, the seahorse, to see how the population is fairing amid increasing demand from the eastern medicine market. Plus, there's a dive in search of the sunken remains of a medieval village, dragged into the sea by a cyclone.