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