Sergeant Cawood's world is shattered when the man who drove her daughter to suicide is released from prison; Kevin's hasty scheme devastates Nevison.
Catherine's search for Tommy gains momentum when she receives a tip regarding his whereabouts; Helen is shocked to learn that Ann has been abducted.
Tommy brutally takes control of a situation when Officer Kirsten McAskill pulls him and Lewis over, but his actions have devastating consequences.
Catherine and Tommy finally come face-to-face when he discovers he's a father. But a more sinister discovery leaves Catherine fighting for her life.
Catherine sinks into a deep depression as she learns that Tommy is still at large, even as the law enforcement net finally closes in on Kevin.
At Catherine's birthday party, a drunk Daniel reveals a different version of past events. Catherine learns Tommy has been spending time with Ryan.
Catherine makes a gruesome discovery. Tommy receives upsetting news. Clare bumps into an old classmate. John becomes a victim of blackmail.
Catherine brings home a trafficking victim. Frances infiltrates Ryan's life. John takes desperate measures to protect his reputation.
Another woman's body is found. John gets a shock at home. Catherine learns someone is asking Ryan about his dad. Ann finds a link between two cases.
A suspect is arrested in the serial murder case. Ryan receives a mysterious gift. The police link Vicky to John. Neil makes a confession to Clare.
Daniel notices a pattern in Ryan's behavior. Neil loses his resolve. A surprise development clears one suspect. Daryl confides in his mother.
The true identity of Ryan's aide is uncovered. Neil tells Catherine of his past with Vicky. Ann shares a suspicion. John feels the walls closing in.