Guest Stars Steve Geerts as Viktor Maes Rover de Hauwere as Arthur Melnick Clara Cleymans as Carolyn Rashif El Kaoui as Hadi Mansour Louise Clark as Restaurant Host Jared McNamara as Ronan Brannigan Ciara Moynihan as Holly Brannigan Frank Tucker as Garda Mark O'Halloran as Joe Galvin J.J. Orange as Boy Soprano