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.

Alejandro Jodorowsky's daring and psychedelic films of the early 1970's, 'El Topo' and 'The Holy Mountain', cemented his status as the Godfather of the Midnight Movie. In 1974, he began work on his next film, possibly the most ambitious film ever attempted. In the pre-Star War era, Jodorowsky’s adaptation of Frank Herbert’s classic sci-fi novel DUNE was poised to change cinema forever. His DUNE would star Brontis Jodorowsky, Alejandro's own 12 year old son, alongside Orson Welles, Mick Jagger, David Carradine and even Salvador Dali. The team of assembled visual artists were some of the most provocative talents of the era, including H.R. Giger, Chris Foss, and Jean ‘Moebius’ Giraud. The groundbreaking special effects were under the control of Dan O'Bannon and the soundtrack would be created by Pink Floyd and the French prog-rock masters, Magma.
For two years, Jodorowsky and his team of 'Spiritual Warriors' worked night and day on the massive task of creating the fabulous world of DUNE. In order to secure the necessary Hollywood funding, they created over 3,000 storyboards, numerous paintings, incredible costumes, and an outrageous, moving, and powerful screenplay. In the words of Jodorowsky’s producer, Michel Seydoux, 'It should have been enough. But it wasn’t.' Through intimate and honest conversations with Jodorowsky, filmed over the span of three years, plus interviews with legends and luminaries including H.R. Giger (artist, ALIEN), Gary Kurtz (producer, STAR WARS) and Nicolas Winding Refn (director, DRIVE and THE NEON DEMON), as well as never-before-seen realizations of Jodorowsky’s mind-blowing psychedelic space opera, director Pavich's film finally unearths the full saga of 'THE GREATEST MOVIE NEVER MADE'.

Andrew Marr tells the story of the first empires which laid the foundations for the modern world. From the Assyrians to Alexander the Great, conquerors rampaged across the Middle East and vicious wars were fought all the way from China to the Mediterranean. But this time of chaos and destruction also brought enormous progress and inspired human development. In the Middle East, the Phoenicians invented the alphabet, and one of the most powerful ideas in world history emerged: the belief in just one God. In India, the Buddha offered a radical alternative to empire building - a way of living that had no place for violence or hierarchy and was open to everyone. Great thinkers from Socrates to Confucius proposed new ideas about how to rule more wisely and live in a better society. And in Greece, democracy was born - the greatest political experiment of all. But within just a few years, its future would be under threat from invasion by an empire in the east...

The Pythagorian philosopher Plato hinted enigmatically that there was a golden key that unified all of the mysteries of the universe. It is this golden key that we will return to time and again throughout our exploration. The golden key is the intelligence of the logos, the source of the primordial om. One could say that it is the mind of God. With our limited senses we are observing only the outer manifestation of the hidden mechanics of self similarity. The source of this divine symmetry is the greatest mystery of our existence.

Adam Rutherford meets a new creature created by American scientists, the spider-goat. It is part goat, part spider, and its milk can be used to create artificial spider's web. It is part of a new field of research, synthetic biology, with a radical aim: to break down nature into spare parts so that we can rebuild it however we please. This technology is already being used to make bio-diesel to power cars. Other researchers are looking at how we might, one day, control human emotions by sending 'biological machines' into our brains.

Alex Gibney explores the charged issue of pedophilia in the Catholic Church, following a trail from the first known protest against clerical sexual abuse in the United States and all the way to the Vatican. The title is derived from the Latin phrase "mea maxima culpa". It is taken from the Confiteor that is part of the Roman Catholic Mass. It translates into English as "My most grievous fault" The film examines the abuse of power in the Catholic Church system through the story of four deaf men who set out to expose the priest who abused them during the mid-1960s. Each of the men brought forth the first known case of public protest against clerical sex abuse, which later lead to the sex scandal case known as the Lawrence Murphy case. Through their case the film follows a cover-up that winds its way from the row houses of Milwaukee, Wisconsin, through Ireland's churches, all the way to the highest office of the Vatican.