Guest Stars J. Scott Murray as Policeman Morven Christie as DS Sally Kirchner Jane McGrath as Alice Preston Ruth Gemmell as Ellie Brooke Fady Elsayed as Nuri Kavur Catherine Russell as Solicitor Akin Gazi as Bekir Humadi Sean Gallagher as DI John Brooke Alisdair McKee as Martin Carrisford Irena Micijevic as Gulse Kavur Alex Hassell as Simon Turner Charlotte Randle as Katie Turner Michael Bertenshaw as Doug Beale Nick Oshikanlu as Mr. Cukata Matthew Ashforde as DS Colin Hart