Guest Stars Zoe Tapper as Katy Sutcliffe Danny Webb as DS Rory Maxwell Richie Campbell as Liam Sutcliffe Katherine Kelly as DI Karen Renton Sam Spruell as Oliver Graham Dawn Steele as Catherine McAulay Dermot Crowley as Henry Neilson Agni Scott as Dr. Hamood Shauna MacDonald as Mary Earlham Carolin Stoltz as Dr. Engers Alex Jordan as Joshua Lucy Menzies as Carla Josh Zaré as Dylan