Guest Stars Jassa Ahluwalia as Adam Stuart 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 Aasiya Shah as Gemma Khan 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 Mohammed Amiri as Ali Mahmoud Katherine Jakeways as Nicola Alan Asaad as Yousef Mahmoud Munir Khairdin as Omar Dominique Drew as Becca Nixon Amir Mime as Ahmed Mahmoud Maggie O'Neill as Ellen Price Tony Gardner as Hugh Moray Yusuf Hofri as Mustafa Makir Ahmed as Aryan Eliza Hunt as Dinner Lady Moses Adejimi as Jamal Mika Simmons as Chambers' Secretary William Ely as Charity Worker Mairead McKinley as Sinead Quinn Lauren Trickett as Flo's Mother