Comedian David Mitchell stars as John “Ludwig” Taylor, a reclusive puzzle designer who assumes the identity of his twin brother – a detective chief inspector – after he goes missing. Speaking about the new series, David Mitchell said he was delighted that new talent including Mark Bonnar and Fleabag star Sian Clifford have joined the cast. “So I like thinking that my former self would be pleased with me coming back to film a detective series, so that’s a nice feeling.” Sian Clifford as Joanne Kemper MP in Ludwig (Image: BBC/Big Talk Studios)Fleabag star Sian Clifford and Scottish actor Mark Bonnar are joining the cast as local MP Joanne Kemper and newspaper editor Gareth Fisher. Speaking about Clifford and Bonnar joining the series, David Mitchell added: “It was very exciting, I think because they’re both brilliant.