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 Dorothy Atkinson DCS Carol Shaw Actor Ben Ashenden DC Ethan Cole Actor Rumi Sutton DC Caitlin Sullivan Actor Dylan Hughes Henry Betts-Taylor Actor Daniel Lawrence Taylor Aiden Mooney Actor Gary Beadle Phillip Mooney Actor Michael Wildman DCC Clint Radley Actor Rory Douglas-Speed Tristan Price Actor Michelle Greenidge Jackie Mooney Actor Tsion Habte Sienna Mooney Actor Lloyd Bowen Owen Doyle 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