David Mitchell John Taylor Actor, Executive Producer 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 Georgie Fallon Producer Actor Raychel Addo Police Officer Actor Josh Bolt Adam Actor Saurabh Kakkar Executive Producer Kathryn O'Connor Executive Producer Chris Sussman Executive Producer Mark Brotherhood Executive Producer Robbie McKillop Director