Guest Stars Mark Dymond as Lorcan O'Brien Colin O'Donoghue as Conor Elliot Ryan Andrews as Ian Smith Leanna Duke as Aoife Smith Keith McErlean as Adam Laura Way as Emer Blackman Clive Geraghty as Mark Byrne Ciara O'Callaghan as Louise Geary Billy Gibson as Peter Harris Will Irvine as Fergus Lenehan Joe Taylor as Des Lenehan Tracey Moore as Sandy O'Malley