Fired up by the attack on her husband and the murder of Billy Rowan, Nikki is determined to nail the killer. However, the identity parade proves a disappointment when she fails to pick out Greg Farnham and has to watch as he is set free to pursue his vendetta against the police. Undeterred, Nikki and Sally trail him to a friend's house, where she learns he is in an agitated state of mind – and armed with a knife, and Wright finds herself held hostage by the killer, but ends up going all out to save his life when he locks himself in his deceased daughter's home.