A huge revelation about her daughter and Tommy rocks Sergeant Cawood's world; Tommy continues to move under the radar and see his son Ryan at the same time; and the series comes to an end with a tense hostage situation.
Sergeant Cawood is in hospital fighting for her life after Tommy's attack; Tommy strives to keep his actions under wraps by murdering anyone who can reveal what he has done but in doing so, gets himself stabbed.
Sergeant Cawood continues to have trouble accepting her daughter's death which only renews her desire to catch the man responsible. Helen tells Sergeant Cawood everything about the kidnapping but before they can do anything about it, the man she has been looking for finds them.
Sergeant Catherine Cawood continues her search for Tommy, the man who raped her daughter; Kevin owns up to his wife about the kidnapping; and Catherine's ex-husband refusues to accept Catherine's grandson Ryan.
Sergeant Catherine Cawood faces a psychological whirlwind when the man who is blamed for her daughter's suicide is released from prison. Elsewhere, accountant Kevin Weatherill plots to kidnap his late father's best friend's daughter to hold her for ransom.