Genetic breakthroughs have shed light on how life evolves in real-time. From filling in the missing links to creating a new species, in the last 50 years scientists have solved some of the biggest mysteries of evolution. In this episode, we look at revolutionary discoveries that shook the world and may shape our future.

Marine invertebrates are some of the most bizarre and beautiful animals on the planet, and thrive in the toughest parts of the oceans. Divers swim into a shoal of predatory Humboldt squid as they emerge from the ocean depths to hunt in packs. When cuttlefish gather to mate, their bodies flash in stroboscopic colours. Time-lapse photography reveals thousands of starfish gathering under the Arctic ice to devour a seal carcass. A giant octopus commits suicide for her young. A camera follows her into a cave which she walls up, then she protects her eggs until she starves. The greatest living structures on earth, coral reefs, are created by tiny animals in some of the world's most inhospitable waters.

The Sundarbans mangrove forest, in Bangladesh near the Indian border, is a tidal jungle where Ganges and Brahmaputra enter the Indian Ocean. Its has some 400 Bengal tigers - the largest population in the world, and the only to be hardly scared of men. The downside is tigers kill up the 50 Bangladeshis a year, even from neighbouring villages, so keeping them inside the reserve is key to long-term survival.
A recent project tries to train local mongrels, not pets but fiercely self-reliant dogs, to spot and even scare off tigers from villages. An individual tiger can turn into a man-eater in order to survive - this process may occur due to an injury or old age (and so cannot hunt agile prey) or even accidentally tasting human flesh.

The world's shipping industry is facing a major challenge. If global shipping were a country it would be the sixth largest producer of greenhouse gas emissions. At current growth rates, if we do nothing, those emissions could double or even triple by 2050. But shipping companies and engineers are creating remarkable new machines to make their industry greener, using a resource that has moved man across the world’s oceans for thousands of years…Wind.

The second episode dives deeper into the enigmatic world of octopuses, uncovering the extraordinary intelligence of these cephalopods. From their ability to change color and shape in an instant to their sophisticated use of tools, this documentary reveals how octopuses navigate and survive in the ocean's most challenging environments. The documentary explores the profound cognitive abilities of octopuses, highlighting their potential for future planning, problem-solving, and even dreaming.
Witness the coconut octopus's ingenious stilt-walking and shell-wielding tactics, and marvel at the giant Pacific octopus's intricate hunting strategies. Through stunning underwater footage and insights from leading scientists like Dr. Alex Schnell and Dr. C.E. O'Brien, viewers are invited to rethink what they know about intelligence in the animal kingdom. This captivating film showcases the remarkable adaptability and creativity of octopuses, making it a must-watch for anyone fascinated by the mysteries of the ocean.

Legendary oceanographer and TED prize winner Dr. Sylvia Earle is on a mission to save our oceans. Mission Blue is part action-adventure, part expose of an Eco-disaster. More than 100 scientists, philanthropists and activists gather in the Galapagos Islands to help fulfill Dr. Earle's lifelong wish: build a global network of marine protected areas, like underwater national parks, to protect the natural systems that keep humans alive.
As the expedition ends, the Deep water Horizon oil well explodes. With oil gushing into the Gulf of Mexico, Sylvia and an environmental dream team race around the world trying to defend her 'Hope Spots'.