The Internet enables us to connect with people, images and information in ways that were unimaginable 30 years ago. But with every click we are re-wiring the physical structure of our brains. Are we evolving or actively de-evolving down a dopamine-laced click-hole? In this episode meet a 17-year-old boy struggling with an addiction to online pornography; autistic technologists in Silicon Valley who are turning their genetic variation to an advantage; plus, Nootropics, a class of cognition-enhancing supplements that claims to rewire the brain.

Written and presented by David Attenborough, who said: 'One of the most wonderful things about filming plants is that you can reveal hidden aspects of their lives, you can capture the moment as one plant strangles another, and as they burst into flower. But whilst time-lapse photography allows you to see things that no human being has ever seen before". David begins his journey inside the magnificent Palm House, a unique global rainforest in London. Here, he explores the extraordinary plants that are so well adapted to wet and humid environments and unravels the intimate relationships between wet zone plants and the animals that depend on them. It was in the wet zones of the world that plants first moved on to land and in the Waterlily House David reveals how flowers first evolved some 140 million years ago. Watching a kaleidoscope of breath-taking time-lapses of these most primitive of flowers swelling and blooming in 3D, he is able to piece together the very first evolutionary steps that plants took to employ a wealth of insects to carry their precious pollen for the first time. David discovers clues to answer a question that even had Charles Darwin stumped: how did flowering plants evolve so fast to go on to colonise the entire planet so successfully?

Join us in a journey through space and time. Since the birth of modern science and technology, the true nature of universe has been known and at this point of time, universe is so huge that our hearts are filled with awe and reverence more deeply than our ignorant ancestors felt. This is a wonderful, magical and fascinating phenomena spread over the unimaginable vastness and this documentary takes us to its journey thanks to modern CGI technology in HD.

The inspirational story of Owen Suskind, a boy of considerable promise, until he developed autism at the age of 3. He was unable to speak until he and his family discovered a unique way to communicate by immersing themselves in the world of classic Disney animated films. This emotional coming-of-age story follows Owen as he graduates to adulthood and takes his first steps toward independence.

The fifth programme explores the alliances formed between the animal and plant worlds. Attenborough dives into Australia's Great Barrier Reef and contrasts the nocturnal feeding of coral, on microscopic creatures, with its daytime diet of algae. Some acacias are protected by ants, which will defend their refuge from any predator. Besides accommodation, the guards are rewarded with nectar and, from certain species, protein for their larvae as well. Fungi feed on plants but can also provide essential nutriment to saplings (Mycorrhiza). The connection is never broken throughout a tree's life and a quarter of the sugars and starches produced in its leaves is channelled back to its fungal partners. Meanwhile, fungi that feed on dead wood leave a hollow trunk, which also benefits the tree. Orchids enjoy a similar affiliation. Lichens are the product of a relationship between fungi and a photosynthetic associate, usually algae. They are extremely slow-growing, and a graveyard is the perfect location to discover their exact longevity. Mistletoe is a hemiparasite that obtains its moisture from a host tree, while using own leaves to manufacture food. Its seeds are deposited on another by the mistletoe tyrannulet, following digestion of the fruit. The dodder (Cuscuta) is also parasitic, generally favouring nettles, and siphons its nourishment through periodic 'plugs' along its stem. The rafflesia has no stem or leaves and only emerges from its host in order to bloom — and it produces the largest single flower: one metre across.

Ron Mann investigates the miraculous, near-secret world of fungi. Visionaries Gary Lincoff and Larry Evans lead us on a hunt for the wild mushroom and the deeper cultural experiences attached to the mysterious fungi. The oldest and largest living organisms recorded on Earth are both fungi. And their use by a new, maverick breed of scientists and thinkers has proven vital in the cleansing of sites despoiled by toxins and as a "clean" pesticide, among many other environmentally friendly applications. Combining material filmed at the Telluride Mushroom Fest with animation and archival footage, along with a neo-psychedelic soundtrack by The Flaming Lips, this film opens the doors to perception, taking the audience on an extraordinary trip where the fungi might well guide humanity to a saner, safer place.