Ever wonder what's happening inside your head? From dreaming to anxiety disorders, discover how your brain works with this illuminating series. The first episode looks at how memory works and examines the way in which the brain stores, processes, and retrains memories. It also looks at the ways in which memory can fail and discusses how memories can warp over time. It talks to neuroscientists and a memory champion who explains her techniques.

This episode includes footage of wildlife inhabiting underwater kelp forests, 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.

Putin returns to power under a storm after a four-year absence, but his attempts to improve his popularity are hobbled by accusations of corruption. The final part of this sinister history doesn’t quite come up to date with Vladimir Putin’s recent moves to 'reset' the Russian constitution so he can rule, theoretically, until at least 2036 – longer than Stalin. But it does walk us through some of his other moves to entrench power, including vote-rigging in parliamentary elections that was so brazen, his approval ratings fell amid mass street protests. Leading the protests was opposition leader Boris Nemtsov, who was then simply gunned down on a street near the Kremlin.
These days, we are told, the world stage interests Putin more than the Russian one, and with various 'mini-Putins' installed around the world, his legacy looks safe.

A humpback whale mother and calf embark on an epic journey from tropical coral paradises to storm ravaged polar seas. Newly discovered coral reefs in Indonesia reveal head-butting pygmy seahorses, flashing 'electric' clams and bands of sea kraits, 30-strong, which hunt in packs. Elsewhere plagues of sea urchins fell forests of giant kelp. Huge bull fur seals attack king penguins, who despite their weight disadvantage, put up a spirited defence.

Valeant Pharmaceuticals was a multinational specialty pharmaceutical company based in Canada. It grew rapidly through a series of mergers and acquisitions under the leadership of J. Michael Pearson. The company was involved in a number of controversies surrounding drug price hikes and the use of a specialty pharmacy for the distribution of its drugs, which led to an investigation by the U.S. Securities and Exchange Commission and caused its stock price to plummet more than 90 percent from its peak while its debt surpassed $30 billion.
Wall Street short-sellers exposed a scam that regulators overlook: how Big Pharma gouges patients in need of life-saving drugs.

It begins by examining the shift in the language and sound of music from the melodies and harmonies of giants such as Mozart, Haydn and Brahms into the fragmented, abstract, discordant sound of the most radical composers of the new century - Schoenberg, Webern, Stravinsky and beyond. It examines how this new music was a response to the huge upheaval in the world at the start of the 20th century, with its developments in technology, science, modern art and the tumult of the First World War. Featuring performances of some of the key works of the period, performed by the London Sinfonietta, members of the Aurora Orchestra and composer and pianist Timothy Andres, the story of this episode in music history is brought to life through the contributions of the biggest names in modern classical music, among them Steve Reich, John Adams, Michael Tilson Thomas, Pierre Boulez, George Benjamin and Alex Ross, music critic of the New Yorker.