Guest Stars Catherine Walker as Alice O'Brien Tomás Ó Súilleabháin as Ronan Donaghue Colin O'Donoghue as Conor Elliot Ryan Andrews as Ian Smith Leanna Duke as Aoife Smith Steven Blount as Steve Roe Cal Kenealy as Martin Tierney Sam Mulcahy as Phil Cody Andrea Irvine as Dr. Kent Alan Howley as Sean Colvin James Mulkerrins as Anaesthetist John Burke as John (Liam's Patient) Amy Kirwan as Sally Horton Mick Staines as James Glynn Emma Lowe as Deborah Cooke Monica Sayers as Kim Tan Jose Mantero as Waiter Deirdre Fagan as Theatre Nurse 1 Fiona Egan as Theatre Nurse 2