With unprecedented access to the Vatican and the people who live there, this is a unique profile of the heart of the Catholic Church and the world's smallest sovereign state. Show more

Simon Sebag Montefiore looks at Istanbul's Greek roots, its transformation into the capital of a Christian empire and reveals how clashes forced eastern and western churches apart. Show more

Andrew Graham-Dixon tells the story of Paul Nash, who was scarred by the First World War and the ghosts of his experiences haunted his future work. Show more

Are we alone? Geneticist Dr Adam Rutherford seeks to define what life is and Maggie Aderin-Pocock explores our chances of finding it in the universe. Show more

Documentary about comets. Many ancient civilisations believed comets were gods. Now, space missions can show what comets are really made of and where they come from. Show more

Documentary tracing the development of British heavy metal from its 60s beginnings in the Midlands with Deep Purple, Uriah Heep and Black Sabbath to its international triumph. Show more

To celebrate the 40th anniversary of Deep Purple's double live album Made in Japan, this film explores these recordings and Deep Purple mark 2, the line-up between 1969 and 1973. Show more

Compilation of memorable heavy metal performances from BBC TV shows, including Iron Maiden, Black Sabbath, Judas Priest and Motorhead.

Andrew Graham-Dixon tells the story of Paul Nash, who was scarred by the First World War and the ghosts of his experiences haunted his future work. Show more