Guest Stars Jack Bannon as Kieran Whitehead Alastair Mackenzie as Craig Petrie Euan Stamper as Crawford Baxter Jim McMeekin as Michael Yuill Shona McHugh as Evie Redford Anita Vettesse as Bea Whitehead Conor McCarry as Dessie Toner Oliver Greenall as Jordan Whitehead Simone Lahbib as Mhari Toner Ron Donachie as Iain Sutherland John Heffernan as Dr. Simon Marr Jenny Ryan as Nicole Patterson Shereen Martin as Kirsty Petrie Murray Fraser as PC Jason Denny George Anton as Don McGrellish Moray Hunter as Ken Patterson Victoria Liddelle as Angusina McGrellish Ali Macdonald Ross as Local / Tourist Fraser James as Oliver Tench Cherry Campbell as Isla Marr Lisa Livingstone as Sarah McKinnon Keiran Gallacher as Jonjo Patterson Hannah Donaldson as Lab technician Mark Wood as Technical Support Officer Amandine Vincent voices French Reporter Olivia Morgan as Reporter