Guest Stars Alison O'Donnell as DI Alison "Tosh" McIntosh Steven Robertson as DC Sandy Wilson Lewis Howden as Sgt Billy McCabe Mark Bonnar as Duncan Hunter Erin Armstrong as Cassie Perez Julie Graham as Rhona Kelly Saskia Reeves as Freya Galdie Archie Panjabi as Asha Israni Anna Chancellor as Phyllis Brennan James Cosmo as Arthur McCall Struan Rodger as Alec Jamie Michie as Lowrie Ace Bhatti as Calvin Sarwar Mark Cox as Tommy Monro Kevin Mains as DS Iain Boyd Bryan Larkin as Gunman Claire Dargo as Kelly Paterson Beth Marshall as Police Officer Sean Hay as Arthur's Heavy Carole Anders as Forensic Nurse Gaylie Runciman as Crisis Worker
