David Mitchell John Taylor Actor Anna Maxwell Martin Lucy Betts-Taylor Actor Dipo Ola DI Russell Carter Actor Sophie Willan Holly Pinder Actor Gerran Howell DC Simon Evans Actor Izuka Hoyle DS Alice Finch Actor Dylan Hughes Henry Betts-Taylor Actor Ralph Ineson Chief Constable Ziegler Actor Dorothy Atkinson DCS Carol Shaw Actor Anton Cross Ojay Turner Actor Natali McCleary Zara Bassett Actor Allan Mustafa Gary Jennings Actor Gavin Spokes Connor Merton Actor Alex Romashov Stefan Kaminski Actor Robert Jarman Martin Symes Actor Georgie Fallon Producer Robbie McKillop Director Kenton Allen Executive Producer Mark Brotherhood Executive Producer Saurabh Kakkar Executive Producer David Mitchell Executive Producer Kathryn O'Connor Executive Producer Chris Sussman Executive Producer