David Mitchell John Taylor Actor, Executive Producer Anna Maxwell Martin Lucy Betts-Taylor Actor Dipo Ola DI Russell Carter Actor Mark Bonnar Gareth Fisher Actor Sian Clifford Joanne Kemper Actor Ralph Ineson Chief Constable Ziegler Actor Dorothy Atkinson DCS Carol Shaw Actor Ben Ashenden DC Ethan Cole Actor Dylan Hughes Henry Betts-Taylor Actor Michael Wildman DCC Clint Radley Actor Rebecca Front Patricia Lowery Actor Doon Mackichan Portia Lowery Actor Gillian Royale Lilibeth Lowery Actor Josh Bolt Adam Newsum Actor Rumi Sutton DC Caitlin Sullivan Actor Bairavi Manoharan Hannah Foster Actor Georgie Fallon Producer Mark Brotherhood Writer, Executive Producer George Kane Director Kenton Allen Executive Producer Kathryn O'Connor Executive Producer Chris Sussman Executive Producer Toby Welch Executive Producer