Deep beneath the Indian Ocean, a team of explorers embarks on a bold scientific mission to capture one of nature’s rarest survivors — the coelacanth, a fish unchanged for 400 million years. Narrated by David Attenborough, the film follows NHK’s deep-sea crew aboard the OceanX vessel as they attempt the world’s first 72-hour observation of this living fossil. Using cutting-edge submersibles, they descend into an ancient realm where time itself seems frozen. As the cameras reveal the coelacanth’s slow, graceful movements, scientists uncover vital clues about evolution’s greatest leap — the moment life crawled from sea to land. Blending adventure, technology, and breathtaking natural history, this deep-ocean odyssey illuminates how a single fish still holds the key to understanding our own beginnings.
In the second episode, Will Smith descends 3,300 feet to the bottom of the ocean in a deep-water submersible, where even fewer people have gone than outer space. Along the way down, Will and explorer Diva Amon investigate how colour is used in the natural world and the role of bioluminescence. In the oceans, nearly 80 percent of animals use bioluminescence in some way, possibly the most common form of communication on the planet.
As the cameras reveal the coelacanth’s slow, graceful movements, scientists uncover vital clues about evolution’s greatest leap — the moment life crawled from sea to land. Blending adventure, technology, and breathtaking natural history, this deep-ocean odyssey illuminates how a single fish still holds the key to understanding our own beginnings.