S1, E106: How far is Sean prepared to go to uncover his father’s killer? Holed up in a safehouse with Billy and Marian, he is forced to confront uncomfortable truths about his family – and himself. But the truth has never been closer. The Wallaces have taken a hostage who knows the truth about the attacks on the family. As Elliot is brought further into the fold, he sets off on a mission with Sean to investigate the home of a mercenary that attacked them. Deeply troubled by what they uncover, Sean has to resist a dark temptation. Meanwhile, Alex uncovers a shocking secret about Finn’s killer – and resolves to reveal it to Sean, no matter what the cost. As the pressure on the Wallace family grows, Marian questions Sean’s resolve, whilst Billy falls further into despair. What will the truth cost the family? And is it a price truly worth paying?