S5.E18 ∙ Stroud

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.

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.

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.

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."

Obesity has become one of the most overwhelming diseases in our modern society, even now considered to be of epidemic proportions. This documentary film dives into this sensitive, but socially powerful topic and exposes shocking statistics of the fattening of our culture. Kenny Saylors, overweight himself, faces his own fat in his life as he embarks upon a 55 day, Doctor supervised, water fast to see the effects of this ancient practice on our bodies today and to examine if healing properties truly do exist within our own bodies in this extreme method of food restriction.

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.