After a surprising breakthrough in Jay’s case, Nikki struggles to accept that Scott may not be responsible. Meanwhile, DI Mason asks Jack and Nikki to investigate the death of someone close to the case. What at first appears to be a house fire, Jack confirms was an arson attack, and Nikki discovers that the victim was murdered before the fire was set. The team struggle to find a connection to Jay’s case, but when crucial evidence is retrieved from the scene, their attention returns to the prison. Show less