Guest Stars Lisa Hogg as Emma Riley Barry McGovern as Dr. James Whelan Jade Jordan as Donna Walsh Lloyd Hutchinson as Supt. Shanahan Andrew Bennett as Donal Riley Orla Charlton as Deirdre McGuire Seán T. Ó Meallaigh as Jack Lucey Hannah James-Scott as DG Angela Webster Mae Higgins as Young Fia Ally Ní Chiaráin as Sandra Riley Brendan Conroy as Fergus Slattery Ingrid Craigie as Marjorie Whelan Senan Jennings as Aidan Lucey Gerard Meehan as Shane Furlong Clara Fitzgerald as Róisín Hurley Siobhán O'Kelly as Elizabeth Lucey Gwynne McElveen as Dr. Myreen Burgess