Guest Stars Clare Calbraith as DC Rebecca "Shep" Shepherd Liam Cunningham as Sam Harper Christine Bottomley as Lisa Strachan Jill Halfpenny as Maggie Warnock Sophie Stuckey as Eva Harper Ralph Ineson as Ross Strachan Co Starring Riley Jones as DC Mark Edwards Jeany Spark as Agnes Lennox Emily Taaffe as Janna Jeffries Paul Clayton as Hotel Manager Michael Cronin as Grandad James Anthony Pearson as Reece McMurray Alan Westaway as John Warnock Billy Kirkwood as Comedian Poppy Tomlinson as Denice Strachan