BBC Four

A young squire accused of murdering a young girl that did not return his feelings of love reveals a supernatural secret at his trial.

Chaos theory has a bad name, conjuring up images of unpredictable weather, economic crashes and science gone wrong. But there is a fascinating and hidden side to Chaos, one that scientists are only now beginning to understand. It turns out that chaos theory answers a question that mankind has asked for millennia - how did we get here?

Documentary following the discovery and investigation of a 4,000-year-old body that was preserved in a peat bog in Cashel in the Irish midlands

Katherine Ryan presents a celebration of one of the biggest comedy talents to ever appear on the small screens – the razor-sharp-tongued first lady of laughter, Joan Rivers.

Kenneth Williams was the star of the Carry Ons and Round the Horne. Despite his fame, he led a life full of mental torture as he tried to overcome his homosexuality in 1950s Britain. This film follows his life and eventual death based on the many diaries he kept

Adrian Edmondson narrates a documentary chronicling the story of Stiff Records, a tiny independent that took music out of the boardroom and gave it back to the fans. Stiff's successes included Nick Lowe, the Damned, Elvis Costello, Ian Dury, Madness, Tracey Ullman and the Pogues. Contributors include Captain Sensible, Jonathan Ross, Suggs, Shane MacGowan and label founders Jake Riviera and Dave Robinson.

Professor Jim Al-Khalili looks at how we have created machines that can simulate, augment, and even outperform the human mind - and why we shouldn't let this spook us. He reveals the story of the pursuit of AI, the emergence of machine learning and the recent breakthroughs brought about by artificial neural networks. He shows how AI is not only changing our world but also challenging our very ideas of intelligence and consciousness. Along the way, we'll investigate spam filters, meet a cutting-edge chatbot, look at why a few altered pixels makes a computer think it's looking at a trombone rather than a dog and talk to Demis Hassabis, who heads DeepMind and whose stated mission is to 'solve intelligence, and then use that to solve everything else'. Stephen Hawking remarked 'AI could be the biggest event in the history of our civilisation. Or the worst'. Jim argues that AI is a potent new tool that should enhance our lives, not replace us.

Set and filmed at the iconic Maida Vale studios, The Dead Room tells the story of a long-running radio horror series and its veteran presenter and national treasure Aubrey Judd. But times are changing. Tastes are shifting. There’s a new young producer. Whatever happened to the classic ghost stories? The good old days? Aubrey soon discovers that all is not quiet in the eerie radio studio and that elements of his own past are not as dead and buried as he perhaps hoped…

An all star cast unite to perform a distinctive BBC Wales Television adaptation of Dylan Thomas's radio play, presented in collaboration with National Theatre Wales, to mark the centenary of Dylan Thomas' birth. The plot reveals the innermost thoughts of the residents of the small, Welsh fishing village Llareggub as it delves into the dreams of various townspeople including blind sailor Captain Cat, who is haunted by visions of drowned shipmates, Mog Edwards and Myfanwy Price, who dream of each other, and Mrs. Ogmore Pritchard, who dreams of her former husbands.

A witty and mind-expanding exploration of data, with mathematician Dr Hannah Fry. This high-tech romp reveals what data is and how it is captured, stored, shared and made sense of. Fry tells the story of the engineers of the data age, people most of us have never heard of despite the fact they brought about a technological and philosophical revolution.

The extraordinary story of comedian Bob Monkhouse's life and career, told through the vast private archive of films, TV shows, letters and memorabilia that he left behind.

Janina Ramirez explores the BBC archives to create a TV history of Leonardo Da Vinci, discovering what lies beneath the Mona Lisa and even how he acquired his anatomical knowledge.

Despite the mantra of 'live fast, die young', Britain's first rock 'n' roll generations are now enjoying old age. What was once about youth and taking risks is now about longevity, survival, nostalgia and refusing to grow up, give up or shut up. But what happens when the music refuses to die and its performers refuse to leave the stage? What happens when rock's youthful rebelliousness is delivered wrapped in wrinkles?

what is everything, and what is nothing? Professor Jim Al-Khalili explores the true size and shape of the universe and delves into the amazing science behind apparent nothingness. EVERYTHING: what the universe might actually look like and the remarkable stories of the men and women who discovered the truth about the cosmos. NOTHING: science at the very limits of human perception, where we now understand the deepest mysteries of the universe lie. The quantum world of the super-small shaped the vast universe we inhabit today, and Jim Al-Khalili can prove it.

The Secret Policeman benefit shows for Amnesty International brought together comedy grand masters - from Python and Beyond the Fringe - and performers then relatively unknown, like Rowan Atkinson. Narrated by Dawn French, the programme includes interviews with many of the comedians and musicians who took part: John Cleese, Stephen Fry, Michael Palin, Sting, Lenny Henry and many more. The shows and their stars had a huge effect on modern British comedy. There are few comics today whose careers have not been heavily influenced by the anarchic and surreal humour of these events.

Combining European musical influences, perfect production and lyrics of love and loss, ABBA made us fall in love with the sound of Swedish melancholy. This documentary explores the music of ABBA and chronicles how they conquered both Sweden and Britain in the face of constant criticism.

Documentary celebrating the triumph, tragedy and human comedy that was Manchester record company, Factory. Started by the late Tony Wilson, Alan Erasmus, Peter Saville and Martin Hannett in the late 1970s, it became known as the home of Joy Divsion, New Order and Happy Mondays and for creating the Hacienda club. The label pioneered Britain's independent pop culture, creating a new Manchester and blowing a shed-load of money. Includes interviews with all the main players in the Factory story.

Charlie Luxton presents the world's 20 weirdest, most fascinating and jaw-dropping homes, from a house shaped like a beagle to a home in a New York dumpster and Pierre Cardin's space-age summer house.

This musical celebration charts the lives and careers of some of the biggest selling acts in Irish rock, punk and pop from Van Morrison and Thin Lizzy to The Undertones and U2. From the pioneers of the showbands touring in the late 50s through to the modern day, the film examines their lineage and connections and how the hardcore, rocking sound of Belfast merged with the more melodic, folky Dublin tradition to form what we now recognise as Irish rock and pop.

On October 5th 1962, the Beatles released their first single, Love Me Do. It was a moment that changed music history and popular culture forever. It was also an extraordinary year in social and cultural history, not just for Liverpool but for the world, with the Cuban missile crisis, John Glenn in space and beer at a shilling a pint. Stuart Maconie explores how the Beatles changed from leather and slicked back hair to suits and Beatle mops, and how their fashion set the pace for the sixties to follow. Pop artist Sir Peter Blake, Bob Harris and former Beatles drummer Pete Best join friends to reflect on how the Beatles evolved into John, Paul, George and Ringo - the most famous band in the world.