Guest Stars Catherine Walker as Alice O'Brien Simon O'Gorman as Billy Flanagan Tomás Ó Súilleabháin as Ronan Donaghue Colin O'Donoghue as Conor Elliot Hilary Reynolds as Aideen Boylan Keith McErlean as Adam Lesley Conroy as Kathleen Roche Keith Duffy as Paul Dunne Darren Healy as Richie Sweeney Cara O'Sullivan as Lorna Boylan Morgan Moore as Noah Sweeney Noni Stapleton as Bridget Sweeney Jonathan Ryan as Greg Hartnett Regan O'Brien as Joan Murphy