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