The BBC’s Radiophonic Workshop was set up in 1958, born out of a desire to create ‘new kinds of sounds’. Alchemists of Sound looks at this creative group from its inception, through its golden age when it was supplying music and effects for cult classics like Doctor Who, Blake’s Seven and Hitchhiker’s Guide To The Galaxy, and charts its fading away in 1995 when, due to budget cuts, it was no longer able to survive.

In seconds, a supertwister can leave immense swaths of death and destruction. But what if technology could help us tame nature’s most violent tornadoes?

Millions remember the countdowns, launchings, splashdowns and parades as the U.S. raced the USSR to the Moon in the 1960s, but few know that both superpowers also ran parallel covert space programs to launch military astronauts on spying missions.

A loggerhead turtle journeys across the Pacific, meeting dolphins and whales, sharks and giant squids, and typhoons and fishermen along the way. She swims over deep canyons, and uses underwater mountain tops like motorway service stations.

Blue whales thunder by like juggernauts, and sharks dance a beautiful midnight ballet around her. Pacific means peaceful, but it is clearly not. One minute she is under fire from marlin, the next swimming over a coral reef, with crocodiles as well as sharks.

Nick Cook, a British aerospace journalist with a 20-year history of “getting below the surface” of some of the strangest military aircraft to take to the skies, applies his expert, investigative skills to a world of mystery and deceit – a fantastical place full of UFOs, strange encounters, and alien abductions. Much of his time has been spent at the respected journal, Jane’s Defence Weekly. His job is to investigate secret programs – the shadow defense industry, worth billions of dollars, but hidden from public view.

2003 British television film directed by Stephen Frears from a script by Peter Morgan, based upon ‘The Rivals’ by James Naughtie. It stars David Morrissey as Gordon Brown and Michael Sheen as Tony Blair, and depicts the Blair-Brown deal – a well-documented pact that Blair and Brown allegedly made whereby Brown would not stand in the 1994 Labour leadership election so that Blair could have a clear run at becoming leader of the party, and eventually Prime Minister.

100 years after the event, no-one is quite sure what caused the massive Tunguska explosion.  Most believe the explosion, which was so powerful it smashed windows hundreds of miles away, was caused by a large meteor or comet breaking up in the atmosphere above.  But there are plenty of other theories out there – some sensible, some not so sensible – that have refused to die over the past century.

In an attempt to find out what really happened, film-makers George Carey and Teresa Cherfas packed up their cameras and headed out to Siberia. On their journey they talk to everyone with a theory, from mystics and reindeer herders, to amateur sleuths and serious scientists.

A documentary about the decay and industrial collapse of America’s fourth largest city. Built by the car for the car, with its groundbreaking suburbs, freeways and shopping centres, it was the embodiment of the American dream.

But its intense race riots brought the army into the city. With violent union struggles against the fierce resistance of Henry Ford and the Big Three, it was also the scene of American nightmares. Nowadays it is a deprived post-industrial city, in which 40 per cent of the land in the centre is returning to prairie. Greenery grows up through abandoned office blocks, houses and collapsing car plants, and swallows up street lights.

Documentary exploring the notion of the modern-day corporation, considering its legal status as a class of person and evaluating its behaviour towards society and the world at large as a psychiatrist might evaluate an ordinary person.

The film shows the development of the contemporary business corporation, from a legal entity that originated as a government-chartered institution meant to effect specific public functions, to the rise of the modern commercial institution entitled to most of the legal rights of a person.

Born during the Cold War, Area 51 in Nevada, also known as Groom Lake or Dreamland, became not only the Air Force’s most strategic test site, but also a symbol of everything that was sneaky about the U.S. military-industrial-intelligence complex.

In recent years, UFO investigators claimed that the top-secret planes tested there were built with technology gleaned from captured alien aircraft. We uncover the secrets of the cryptic desert facility and look into mysterious deaths of base workers.

Documentary exploring the generation of post-punk musicians who took the synthesizer from the experimental fringes to the centre of the pop world.

In the late 1970s, small pockets of electronic artists including the Human League, Daniel Miller and Cabaret Volatire were inspired by Kraftwerk and JG Ballard and dreamt of the sound of the future against the backdrop of bleak, high-rise Britain.

The crossover moment arrived in 1979 when Gary Numan’s appearance on Top of the Pops with Tubeway Army’s Are Friends Electric heralded the arrival of synthpop. Four lads from Basildon known as Depeche Mode would come to own the new sound whilst post-punk bands like Ultravox, Soft Cell, OMD and Yazoo took the synth out of the pages of the NME and onto the front page of Smash Hits.

By the time we are three, many of us will have learned how to count. Once we’ve learned how, it seems as if there’s nothing to stop us counting indefinitely. While infinity may seem like a perfectly innocuous idea however, keep counting and you enter a paradoxical world where nothing is quite 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.