Midsomer Murders: 20th Anniversary Special: Directed by Rachel Glaister. With Neil Dudgeon, John Nettles, Daniel Casey, Jason Hughes. This special brings together former and current actors on the show as well as producers and others working behind the scene to talk about memorable moments from the past 20 series. Presented by John Nettles, the original Barnaby, this anniversary special features stars past and present discussing the peculiar quirks of the delightful yet deadly county that have made the show such a success.