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