BBC Timewatch Documentary, from 2004. The UFO phenomenon in Britain took off in the 1950s, when alleged sightings began and Clement Attlee formed the Flying Saucer Working Party. This documentary recalls how UFOs became a symbol of the communist threat during the Cold War and how paranoia over these mysterious vessels struck. Director Michael Wadding Editor John Farren (AD)

First part of the BBC documentary, from 2007, hosted by David Malone, that tracks the lives of four of history’s most eminent mathematicians – Georg Cantor, Ludwig Boltzmann, Kurt Gödel and Alan Turing – all of them geniuses whose works not only contributed to a better understanding of the universe but also profoundly changed the world. However, every one of the four tragically went insane and later committed suicide as they pushed the boundaries of scientific endeavour. The documentary is an enlightening exploration of whether there are some boundaries of knowledge that the human mind should not seek to cross.