Guest Stars Sophie Wasson as Madison O'Brien Suzy Lawlor as Annie Ward Thomas Farrell as Dave McGinn Alison Doody as Lucille Feidlim Cannon as Anthony Cillian Tallon as Bart Lorcan Cranitch as Diarmuid Keene Janice Byrne as Lara David Heap as Aran O'Donoghue Ciaran McMahon as Garda Murphy Kate Perry as Katie Doolan Anna Gallagher as Eillis Doolan Richard Mulcahy as Methadone Doctor Darren Llyod as Garda Claire Jenkins as Marriane Colm Mckenzie as Croupier Vinny Murphy as Drug Dealer Alan Wai as McCann Bríd Ní Neachtain as Patricia May Eamon Rohan as Mr. Stapleton Conor Madden as Mowson