S4.E1 ∙ Riddle of Petra

Documentary examining claims that CS Lewis's Narnia Chronicles contain a hidden meaning. CS Lewis wrote the Narnia Chronicles over 50 years ago, yet they are more popular today than ever. When they were first published, many critics thought them little more than childish scribblings, replete with random characters and unexplained events. Even Lewis's good friend JRR Tolkien thought them confused and misconceived. Other scholars were sure there was something more, something hidden beneath the stories. Although many tried, none could find this secret key of Narnia - until now. Dr Michael Ward, a young academic and expert in all things Lewisian, claims he has found the answer at last: he has discovered the Narnia Code. Using dramatisations of Lewis's early life and career, the programme travels the world, from the Mid-West of modern America to the battlefields of the First World War, meeting experts, testing evidence and uncovering surprising questions and ideas that still challenge readers today.

When Ryan and Amy Green learned that their baby son Joel's rare cancer was terminal, Ryan, an indie game developer, found solace in the only creative outlet he knew: a video game, the critically acclaimed "That Dragon, Cancer."

Two eccentric scientists struggle to create eternal youth in a world they call "blind to the tragedy of old age." As they battle their own aging and suffer the losses of loved ones, their scientific journeys ultimately become personal.

DISTANT is a film that is made up of 13 sections, each comprised of a single long take. Each section tells a story about distance between different time and space, focusing on the subtle moments when people are suddenly confronted with modernity and gradually become lost in the transition between this and their present lives. Without any dialogue, simply working with image, sound and actions of the characters, these 13 dramatic, realistic and mysterious scenes are painted. It tries to describe today's human condition in an abstract way - its alienation, abandonment and eternal loneliness.

Norihito, who works at a company that cleans up the houses of people who die alone, begins to question his own life and past due to all the lonely deaths he saw.

The most ambitious project ever conceived on the Internet: Google's master plan to scan every book in the world and the people trying to stop them. Google say they are building a library for mankind, but they also have other intentions.