In his latest film, Alex Gibney, whose recent work includes 'Enron: The Smartest Guys in the Room' and 'Going Clear: Scientology and the Prison of Belief', turns his attention to global cyber warfare. 'Zero Days' tells the story of the most sophisticated piece of malware ever created. Gibney talks to Kirsty Lang about the visual and practical challenges of making a film about a computer code that nobody wants they created.

Soul singer Ray BLK is number 1 on the BBC's Sound Of 2017 list, which predicts the most exciting new music for the year ahead. Artists who have topped the list previously include Adele, Sam Smith and Ellie Goulding. Ray BLK came to attention with her song 'My Hood' which describes the joys and tribulations of growing up female, black and in South London. She explains why she believes in 'socially conscious' music.

Brian Conaghan has won the Costa Children's Book Award for 'The Bombs That Brought Us Together'. It tells the story of Charlie, who has lived in Little Town all his life, and Pav, a refugee from Old Country - Little Town's sworn enemy. Pav is "the wrongest person in the world to make friends with" but the pair form a bond as life around them falls apart. Influenced by recent world events, Conaghan describes his book as "an otherworldly, allegorical tale".

Tomorrow evening BBC One embarks on its latest quest for singing talent in 'Let It Shine', presented by Gary Barlow. In direct competition an hour later 'The Voice' makes its transition from the BBC to ITV. Music writer Ben Wardle looks back at the history of Saturday night talent shows - from Popstars to The X Factor and BGT - and ponders whether these new offerings are what the nation really needs for its Saturday Night entertainment.

Producer: Julian May. Show less