Once a rich wilderness teeming with lions, tigers and cheetahs, the Gangetic plains of northern India have been transformed into the most densely populated place on Earth. The film explores the impact of this tide of humanity on the wildlife of the plains - from the all-out war between elephants and villagers to worship of the deadly cobra.
At the southern tip of Africa, where two oceans collide, the flat-topped Table Mountain stands guard over a diverse metropolis of cultures and people. Take flight over the Western Cape and discover the breathtaking wonder of this province from above.
In this episode, Professor Brian Cox shows how Earth's basic ingredients, like the pure sulphur mined in the heart of a deadly volcano in Indonesia, have become the building blocks of life. Hidden deep in a cave in the Dominican Republic lies a magical world created by the same property of water that makes it essential to life. Clinging to a precipitous dam wall in Italy, baby mountain goats seek out Earth's chemical elements essential to their survival. In the middle of the night in a bay off Japan, Brian explains how the dazzling display of thousands of glowing squid shows how life has taken Earth's chemistry and turned it into the chemistry of life.
Svalbard in the Arctic spends many months of the year in complete darkness, an unrelenting frozen winter with temperatures down to -40 Celsius. But when the sun finally reappears, the landscape magically transforms from an ice world into a rich tundra, full of exotic plants, birds, arctic foxes, polar bears, walrus and reindeer. This film captures the changes in all their glory and reveals how this transformation is only possible thanks to some bizarre micro-organisms that feed on ice and the stunning abilities of migrating birds.