Guest Stars Daniel Ings as David Gilkes Andrew Scott as Chris Gilheany Amanda Drew as Hayley Blackwood Quincy Dunn-Baker as Don Monica Dolan as CS Linda Grace Topher Grace as Billy Bauer Damson Idris as Jaden Tommins Sarah Ridgeway as WPC Roach Jorge Cordova as Agent Ernesto Cruz Adam McNamara as Marksman Harris Caitlin Innes Edwards as Hannah Kent Laura Morgan as Thalia Ambreen Razia as WPC Najma Haque Archie Rush as Cosmo Doyle Ruibo Qian as Penelope Wu Calum Callaghan as PC Damien Bullen Roger Alborough as Joe Seun Shote as Simon Alice Bailey Johnson as Markswoman Jones Crystal Clarke as Tipi Mirirai Sithole as Shonelle Maggie Bain as Maryam Conrad Khan as Dibbs Gareth Kane as PC Wanson Hilary Connell as Receptionist