Guest Stars Lisa McGrillis as Sandra McKay Maureen Beattie as Carol Kendrick Laurie Brett as DC Gemma Darlington Orla Russell as Emily Kendrick Aaron Connell as Elliot Campbell Lorn MacDonald as PC Taylor Clarke Lilac Jackson as Charlotte Kendrick Felicity Keenan as Iris Kendrick Bradley Connell as Lewis Campbell Lindy Whiteford as Ruth McKenzie Jamie Michie as Simon Wells Stuart Bowman as Dr. Mark Denham-Johnson Jack Greenlees as Luke Richmond Grace Calder as Tessa Wells Lewis Gribben as Dylan Denham-Johnson Gordon Brown as DCI Spencer Collins Julie Miller as Lynn Denham-Johnson Ron Donachie as Callum McKenzie Seline Hizli as Sasha Thompson Hannah Donaldson as IVF Doctor Leah Byrne as IVF Nurse Julia Taudevin as Reverend Mary Dunbar