In the fourth episode, Professor Marcus du Sautoy concludes his investigation into the history of mathematics with a look at some of the great unsolved problems that confronted mathematicians in the 20th century. After exploring Georg Cantor's work on infinity and Henri Poincare's work on chaos theory, he sees how mathematics was itself thrown into chaos by the discoveries of Kurt Godel and Paul Cohen, before completing his journey by considering some unsolved problems of maths today, including the Riemann Hypothesis.

Zachary Quinto embarks on a journey to understand how artificial intelligence may already be a threat to humanity. He visits Facebook headquarters where he learns about a failed AI experiment where two chat boxes created a language that only they could understand. Zach also gets a firsthand look at the world's latest technology, including life-like dolls programmed with advanced AI, robots that learn and communicate telepathically, highly intelligent drones of war, and Uber self-driving cars.

Follows Vice journalists Shane Smith, Ryan Duffy and Suroosh Alvi as they go to different parts of the world telling us surprising and shocking stories. In Afghanistan, the Taliban has ramped up its use of children in suicide bombing terrorist attacks. Ranging from teenagers to children as young as six years old, they are routinely manipulated and lied to as they are sent to blow up their targets. The Philippines are the most dangerous place in the world to run for office, as politicians are routinely killed by their rivals.

In this revealing documentary, Giancarlo Granda, former pool attendant at the Fontainebleau Hotel, shares the intimate details of his 7-year relationship with a charming older woman, Becki Falwell, and her husband, the Evangelical Trump stalwart Jerry Falwell Jr. Directed by Billy Corben, the film outlines Granda's entanglement with the Falwell's seemingly perfect lives and the overarching influence this affair had on a presidential election.
The life of Jerry Falwell — the late Moral Majority televangelist who for decades helped catalyze the rightward shift of American evangelicals before his death in 2007 — is a quintessentially American story. But it’s in the next generation that the Falwell narrative becomes at once soap opera and morality tale. The film covers the graceless fall of Jerry Falwell Jr., who after the death of his father was placed in the presidency of the family’s conservative organ Liberty University. There, he seemed to remain painfully in thrall to his appetites. We hear testimony about his alleged tendency to drink on the job and discomfiting, slurry interviews between him and sympathetic media — but most crucially, we receive the testimony of Giancarlo Granda.
Granda was a pool attendant at a Miami hotel when he met Falwell and his wife, Becki, in 2012. Today, he alleges that he was persuaded to have sex with Becki while Falwell watched, and that the pair engaged in an ongoing campaign of communication with him that could be described as coercive. His energies were consumed with managing their tempers and occasionally threatening behavior, and he blames the swirl of scandal around them for derailing his professional future. Plainspoken and only occasionally visibly emotional, Granda is his own best advocate as he describes a couple who, he says, craved his body and were willing to discard the rest of him.

This documentary looks at the remarkable genius of Orson Welles on his centenary - the enigma of his career as a Hollywood star, a Hollywood director (for some a Hollywood failure), and a crucially important independent filmmaker. Orson Welles's life was magical: a musical prodigy at age 10, a director of Shakespeare at 14, a painter at 16, a star of stage and radio at 20, romances with some of the most beautiful women in the world, including Rita Hayworth. His work was similarly extraordinary, most notably Citizen Kane, (considered by many to be the most important movie ever made), created by Welles when he was only 25. In the years following Citizen Kane, Welles's career continued to change as he made film after film (some never finished, many dismissed) and acted in other projects often to earn money in order to keep making his own films. Magician features scenes from almost every existing Welles film, from Hearts of Age, (which he made in a day when he was only 18 years old) to rarely-seen clips from his final unfinished works like The Other Side of the Dream, The Deep, and Don Quixote, as well as his television and commercial work.

By our third year, most of us will have learned to count. Once we know how, it seems as if there would be nothing to stop us counting forever. But, while infinity might seem like an perfectly innocent idea, keep counting and you enter a paradoxical world where nothing is as it seems. Mathematicians have discovered there are infinitely many infinities, each one infinitely bigger than the last. And if the universe goes on forever, the consequences are even more bizarre. In an infinite universe, there are infinitely many copies of the Earth and infinitely many copies of you. Older than time, bigger than the universe and stranger than fiction. This is the story of infinity.