Jeff Pope Creator, Writer, Executive Producer Stephen Graham Matthew Collins Actor, Executive Producer Andrew Ellis Robbie Mullen Actor Leanne Best Alison Actor Chris Coghill Chris Lythgoe Actor David Hayman Older Lenny Actor Shvorne Marks Brenda Actor Ryan McKen DS Donkor Actor Bobby Schofield Matt Hankinson Actor Dean-Charles Chapman Jack Renshaw Actor Jason Flemyng Nick Lowles Actor Tracy-Ann Oberman Deputy Chief Magistrate Arbuthnot Actor James Buller Attacker Actor Nicola Stephenson Renshaw's Mother Actor Sami Amber Billy Actor Alfie Clark Mickey Actor Alexander Charles Plumbly Danny Actor Ezra Watson Garron Helm Actor Josef Davies Ben Raymond Actor Steven Miller Young Lenny Actor Sam Baker-Jones Young Matthew Actor Jodie Prenger DC Buckley Actor Jonathan Kemp Home Office Minister Actor Remy Beasley DC Victoria Henderson Actor Paul Bown Renshaw's Solicitor Actor Lindsay Wright Original Music Tom Dunbar Executive Producer Paul Andrew Williams Executive Producer, Director Jo Johnson Producer