Guest Stars Frankie McCafferty as Barney Nugent Gerard Jordan as Anto Donovan Matthew Forsythe as Aodhan McAllister Paddy Jenkins as Happy Kelly Art Campion as Sully Nabil Elouahabi as Joseph MI5 Charlie Maher as Fogerty Neil Keery as Lawrence McCloskey Stefan Boehm as Mark Blundell Clare Gray as Rachel MI5 Shane McCaffrey as Quinny Antoinette Morelli as Bridie Conlon Maria Quinn as Monica Dearbháile McKinney as Aisling Rachel Murray as Sam Walsh Bernadette Brown as Kill House Woman Laura Hughes as Josephine Davies