THE WHODUNNIT IS evolving. The success of modern adaptations of the classic mystery format, from Kenneth Branagh’s starry, glamorous remasterings of Agatha Christie’s Hercule Poirot novels to Rian Johnson’s Knives Out, which has a sequel due later this year, has paved the way for innovative, boundary-pushing new films and shows. This year saw Chris Miller’s series The Afterparty turn the whodunnit into a multi-genre romp. Only Murders In The Building, a New York comedy co-created by Steve Martin, sees his true-crime nut unite with two fellow self-made detectives played by Selena Gomez and Martin Short to crack a local case. Here, we speak to leading voices in the genre to break down just what makes today’s murder-mysteries tick.