British author, dance critic and journalist, whose 2017 book Codename Villanelle was the basis for the BBC’s Killing Eve TV series My latest novel, #Panic, was inspired by an online chatroom, and a group of TV superfans. Five years ago, I knew little or nothing of this niche world, and wouldn’t have dreamed of trying to write about it, but in April 2018, Killing Eve premiered on BBC America. I had written the stories on which the show was based, and soon began to be contacted online by fans of the series. Most had questions about Eve and Villanelle: they...