The third episode looks at anxiety and explores why it is so common. It talks to neuroscientists who explain the physiological and evolutionary basis of anxiety. Although it can help animals escape predators, anxiety can cause serious problems for human beings. It talks to sufferers of anxiety and examines the different types of anxiety people can feel. It also looks at how social media can cause anxiety.

The series about the man, myth and legend - founder of Microsoft and co-founder of the Bill and Melinda Gates Foundation - reflects on his trailblazing work with computer software, starting the largest private philanthropic foundation. Bill Gates opens up about his childhood, business career and passion for improving the lives of people in the developing world.
When Bill Gates stepped down from Microsoft in 2008, he was worth more than 58 billion dollars. He built that fortune thinking about computer software, operating systems, spreadsheets and the Internet. What was on his mind?

For the past 42 years Director Jon Alpert has been following Fidel Castro and three Cuban families affected by his policies. Their lives put us right in the roller coaster of the Cuban Revolution. Because of Alpert's unique access to the island, and the trust and friendships earned over decades, this film is a candid and revealing never-before-seen portrait of Cuba.

Millions of tourists photograph the ancient monuments of Rome every year. But is there more to them than people guess? There's new evidence that these ruins were once machines, designed by Rome's emperors to connect their power with the sun. Did Roman emperors harness the power of the universe to awe and terrify the people of Rome? We uncover the last, great mysteries of the ancient world's greatest empire.

Brian Jones, Jimi Hendrix, Janis Joplin and Jim Morrison all died at the age of 27 between 1969 and 1971. At the time, the coincidence gave rise to some comment, but it was not until the death of Kurt Cobain, about two and a half decades later, that the idea of a '27 Club' began to catch on in public perception, reignited with the death of Amy Winehouse in 2011.
Through interviews with people who knew them, such as music stars, critics, medical experts and unseen footage, the lives, music, and artistry of those who died at 27 are investigated with a bid to find answers.

Astrology, the celestial movements of the Sun, Moon, and planets among the stars, governing our personality and destiny. For centuries, millions of people, from paupers to powerful world leaders, have relied on the ancient system for answers. This episode examines whether tracking astronomical phenomena can actually predict the future.