(Click CC for subtitles) Charged with overseeing Israel's war on terror-both Palestinian and Jewish- the head of the Shin Bet, Israel's secret service is present at the crossroad of every decision made. For the first time ever six former heads of the agency agreed to share their insights and reflect publicly on their actions and decisions. The Gatekeepers offers an exclusive account of the sum of their success and failures. It validates the reasons that each man individually and the six as a group came to reconsider their hard-line positions and advocate a conciliatory approach toward their enemies based on a two-state solution.

The contests between predators and prey are the most dramatic events in nature. Taking an intimate and detailed look at the remarkable strategies employed by hunters to catch their prey and the hunted to escape. Sir David Attenborough narrates. "The Hardest Challenge" reveals the extraordinary range of techniques predators use to catch their prey - from a leopard using all its powers of stealth to stalk impala in broad daylight to wild dogs, whose tactic is to wear down their prey over long distances; from Nile crocodiles, the planet's most patient predators, to killer whales who use teamwork and intelligence to take on humpback whales. But even with these finely tuned strategies, the outcome is far from certain. Surprisingly, most predators fail most of the time.

A documentary thriller about the world of cyberwar. For the first time, the film tells the complete story of Stuxnet, a piece of self-replicating computer malware (known as a worm for its ability to burrow from computer to computer on its own) that the U.S. and Israel unleashed to destroy a key part of an Iranian nuclear facility, and which ultimately spread beyond its intended target. This is the most comprehensive accounting to date of how a clandestine mission hatched by two allies with clashing agendas opened forever the Pandora's Box of cyberwarfare.

In the days of the Mayas, cenotes – deep, natural pits on the Yucatan peninsula - provided the only means of obtaining drinking water. But in the mythology of this advanced civilisation, these waterholes and caves were also the entrance to Xibalba – the underworld. All deceased were obliged to pass through Xibalba and wait there until they were called into heaven. It was a place in which one made sacrifices to the gods – objects of daily life, as well as bloody, human sacrifices. To this day, the relics of these acts are still in place preserved underwater for more than a thousand years. The entrance to the underworld begins at a dirty waterhole in the middle of the Mexican jungle overgrown and barely recognisable. But immediately after entry, a hall of breath-taking dimensions and beauty is revealed. As if they were sculptures, stalactites and stalagmites lend the underwater cave an almost sacred ambience. By now, one has succumbed to the fascination emanated by the world’s largest underwater cave system. We accompany four professional research divers to Yucatan – a team of specialists, able to squeeze their bodies through crevices and holes, barely larger than their bodies and who master dives that would push even the most experienced divers to their limits. With them, we penetrate worlds only a few people have ever ventured into. We encounter the remains of human victims, prehistoric fireplaces and primeval animal skeletons and undertake a dive, which takes us from the primeval forest to the open sea. We then enter Xibalba – the place of myths and the dead. In the days of the Mayas - a voyage of no return. Today, this is one of the greatest challenges one can face as a diver – the hidden world of the underwater caves of Yucatan – all filmed in 3D.

The story of how an eccentric French shop keeper and amateur film maker attempted to locate and befriend Banksy, only to have the artist turn the camera back on its owner with spectacular results. Billed as 'the world's first street art disaster movie' the film contains exclusive footage of Banksy, Shephard Fairey, Invader and many of the world's most infamous graffiti artists at work. No director or screenwriters are listed in "Gift Shop's" credits, just the words "A Banksy Film." Banksy is a graffiti artist with a global reputation whose work can be seen on walls from post—hurricane New Orleans to the separation barrier on the Palestinian West Bank. Fiercely guarding his anonymity to avoid prosecution, Banksy has so far resisted all attempts to be captured on film. Exit Through the Gift Shop tells the incredible true story of how an eccentric French shop keeper turned documentary maker attempted to locate and befriend Banksy, only to have the artist turn the camera back on its owner – with spectacular results. The film contains exclusive footage of Banksy, Shepard Fairey, Invader and many of the world's most infamous graffiti artists at work, on walls and in interview. As Banksy describes it, "It's basically the story of how one man set out to film the un—filmable. And failed."

This episode provides an overview of the nature of electromagnetism, as discovered through the work of Michael Faraday. Tyson explains how the idea of another force of nature, similar to gravitational forces, had been postulated by Isaac Newton before. Tyson continues on Faraday, coming from poor beginnings, would end up becoming interested in studying electricity after reading books and seeing lectures by Humphry Davy at the Royal Institution. Davy would hire Faraday after seeing extensive notes he had taken to act as his secretary and lab assistant. After Davy and chemist William Hyde Wollaston unsuccessfully tried to build on Hans Christian Ørsted's discovery of the electromagnetic phenomena to harness the ability to create motion from electricity, Faraday was able to create his own device to create the first electric motor by applying electricity aligned along a magnet. Davy, bitter over Faraday's breakthrough, put Faraday on the task of improving the quality of high-quality optical glass, preventing Faraday from continuing his research. Faraday, undeterred, continued to work in the Royal Institution, and created the Christmas Lectures designed to teach science to children. Following Davy's death, Faraday returned to full time efforts studying electromagnetism, creating the first electrical generator by inserting a magnet in a coil of wires. Tyson continues to note that despite losing some of his mental capacity, Faraday concluded that electricity and magnetism were connected by unseen fields, and postulated that light may also be tied to these forces. Using a sample of the optical glass that Davy had him make, Faraday discovered that an applied magnetic field could affect the polarization of light passing through the glass sample (a dielectric material), leading to what is called the Faraday effect and connecting these three forces. Faraday postulated that these fields existed across the planet, which would later by called Earth's magnetic field generated by the rotating molten iron inner core, as well as the phenomena that caused the planets to rotate around the sun. Faraday's work was initially rejected by the scientific community due to his lack of mathematical support, but James Clerk Maxwell would later come to rework Faraday's theories into the Maxwell's equations that validated Faraday's theories. Their combined efforts created the basis of science that drives the principles of modern communications today.