Delving beneath the surface of the Earth's oceans to uncover a world of extraordinary extremes, including crushing depths, stormy coasts, vast blue deserts, and crowded reefs; how seals fend off sharks; how orcas fight to survive.
Three hundred and seventy miles off the coast of Mexico in the eastern Pacific, the waters surrounding Socorro Island are home to some of the world's largest marine life. Take a deep dive through surging currents and majestic coral reefs with whale sharks, giant manta rays, and more.
How have some plants managed to live 5000 years? They are masters of photosynthesis and have survived on trips into space. In fact, there are now "plantimals". Perhaps it is time we learned more from plants about our world and how to live in it as partners.
Footage of wildlife inhabiting underwater kelp forests, including thousands of giant cuttlefish spawning along a restricted area of rocky reef off the south coast of Australia. Males outnumber females 11 to one, which leads to fierce competition. Larger males use brute force to drive off competition, while their smaller rivals use deception by mimicking the appearance of females. The programme also features tiger sharks hunting for green turtles in fields of seagrass and spider crabs trying to avoid predators while they shed their shells.