Guest Stars Simon O'Gorman as Billy Flanagan Orla O'Rourke as Sinead Kelly Marian Araujo as Marta Lopez Niall Toibin as Dr. Paul O'Callaghan Derek Reid as Jeremy Carter Gary Murphy as Dr. Denny Michael Grennell as Psychiatrist Eamon Rohan as Mr. Durkin Andrea Kelly as Karen Dignam Linda McDonnell as Eileen Murphy Máire Ní Ghráinne as Deirdre Cooney Sarah Gilbert as Mrs. Jennings Katie Keogh as Jenny Jennings