Guest Stars Colin R. Campbell as Detective Superintendent Andrews Adeel Akhtar as Hassan Mahmoud Mark Bonnar as Colin Osborne Badria Timimi as Sara Mahmoud Lorraine Ashbourne as DI Tessa Nixon Nigel Lindsay as Tony Kelsey Rosie Cavaliero as Marion Kelsey Charlie Condou as Simon Aasiya Shah as Gemma Khan Will Brown as Jason Walker Amy Jayne as Flo Bryony Hannah as Cath Emma Cunniffe as Janet Nathalie Armin as DSI Kuldip Gill Holly Aird as Elise Wendy Craig as Joy Dunphy Bill Paterson as Harry Osborne Tom Mannion as Mark Roberts