Guest Stars Aaron Edo as Isaiah Bankole Gavin O'Connor as Macken Sean Fox as Fitzer Seán Edo as Oba Bankole Barry Ward as Matt Cillian O'Sullivan as Dunnie Don Wycherley as Superintendent Cole Jimmy Smallhorne as Gar Carl Shaaban as Brains Phina Oruche as Marvellous Florence Adebambo as Flora Reomy D Mpeho as Toby Enoch Frost as Benjamin Taby Ruigu as Nina Irma Mali as Eloise Dambudzo Huwa as Hope Laura Murray as Gar's Wife Lucy Cray-Miller as Gráinne / Psychologist Alexandra Stamati as Care Worker Bryony Flatman as Dr. Brennan