Lennie James Nelly Actor, Writer, Executive Producer Suranne Jones Claire Actor Stephen Graham Melon Actor Daniel Adegboyega Bertram Actor Shaquille Ali-Yebuah Dominic Actor Alexander Arnold Luke Actor Mia Austen PC Helen Long Actor Alisha Bailey Heather Actor Camilla Beeput Zita Actor Thomas Coombes Got Actor Nicholas Croucher Dylan Actor Indeyarna Donaldson-Holness Jody Actor Phil Dunster BJ McGory Actor Adrian Edmondson Gideon Charles Actor Jason Flemyng Tam Actor Joel Gillman Office Guy Actor Rob Jarvis Daniel Actor Olive Gray Grace Actor Susan Lynch Stage Actor Nadine Marshall DS O'Halloran Actor Ryan McKen DC Leo Rainsford Actor Alan McKenna DCI Ian Thorpe Actor Struan Rodger Richard Actor Ragevan Vasan Gavin Actor Jimmy Walker Marky Actor Barry Ward Barry Actor Leni Zieglmeier Jody Actor Marlon Smith Writer Daniel Fajemisin-Duncan Writer Nick Murphy Director Simon Heath Executive Producer Jessica Sykes Executive Producer Patrick Schweitzer Producer Chas Bain Cinematographer Jill Trevellick Casting Dustin O'Halloran Music Bryan Senti Music Melanie Allen Production Design Rosie Clarke Art Director Lizzie Gray Executive Producer