Guest Stars Alison O'Donnell as DS 'Tosh' MacIntosh 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 Neve McIntosh as Kate Kilmuir Fiona Bell as Donna Killick Julia Brown as Molly Kilmuir Stephen Walters as Thomas Malone Sean McGinley as Drew McColl Sophie Stone as Jo Halley Gerard Miller as Alan Killick Carolin Stoltz as DI Anke Strom Michael Moreland as Benny Ray Arnmundur Björnsson as Lars Bleymann Ida Elise Broch as Trine Joi Johannsson as Andreas Hagan Daniel Stisen as Henrick Hege Schøyen as Nina Soderland