Tom Miller Creator, Executive Producer Sam Myer Creator, Executive Producer Daniel Mays DI John Major Actor Stephen Graham DI Roy Carver Actor Anna Maxwell Martin Kelly Major Actor Richard Gadd Liam Cleasby Actor Michelle Greenidge Officer Not Judy Actor Rosie Cavaliero DCS Dennett Actor Emily Lloyd-Saini Ryle Actor Steve Oram Gilbert Actor Amanda Payton Dr. Alison Parfit Actor Simon Strutt Special Detective Actor Meera Syal Elizabeth Churchland Actor Clive Russell Clifford Major Actor Phil Temple Executive Producer Diederick Santer Executive Producer Morwenna Gordon Executive Producer