Guest Stars Mark Bonnar as Colin Osborne Adeel Akhtar as Hassan Mahmoud Lorraine Ashbourne as DI Tessa Nixon Nigel Lindsay as Tony Kelsey Rosie Cavaliero as Marion Kelsey Badria Timimi as Sara Mahmoud Charlie Condou as Simon Will Brown as Jason Walker Amy Jayne as Flo Josef Altin as Tyler Emma Cunniffe as Janet Douglas Hodge as Paul Nixon Jodie Tyack as Zoe Daniel Gosling as David Walker Nathalie Armin as DSI Kuldip Gill Alan Asaad as Yousef Mahmoud Katherine Jakeways as Nicola Wendy Craig as Joy Dunphy Holly Aird as Elise Munir Khairdin as Omar Dominique Drew as Becca Nixon Tony Gardner as Hugh Moray Richard Hope as James Gregory