Guest Stars Catherine Walker as Alice O'Brien Isobel Mahon as Bernie McMahon Sophie Wasson as Madison O'Brien Hilary Reynolds as Aideen Boylan Darragh Kelly as Niall Boylan Keith McErlean as Adam Darren Healy as Richie Sweeney Laura Way as Emer Blackman Mairead Devlin as A&E Doctor Barry Cassin as Spike Molloy Clodagh Reid as Rachel Miriam McKenna as A&E Nurse 1 Morgan Moore as Noah Sweeney Kelly Gough as Elaine Hughes Fionnuala Murphy as Trina Tito Long as Cian Isabel Byrne as Anaesthetist Yvonne Muldowney as A&E Nurse 2 Laura Hughes as A&E Nurse 3 Moya Farrelly as Jessica Geoff Minogue as Business Man Jennifer Barry as Hayley Liam McMahon as Michael