A water police operation on a container wharf results in a death, leaving each of the Rats to deal with their culpability and guilt.

Christey's investigation into a series of yacht explosions takes him north to a beachside community, where he meets a beautiful female cop with an agenda of her own.

Jack Christey's new relationship is tested when one of the Rats is taken by a serial killer.

Though the serial killer has been caught, Christey supports Blakemore's claims that there is another killer out there, a shadow man targeting the police.

A runaway yacht, a missing child and suspected multiple murders set Alex and Christey down the wrong path, where they uncover a plot to poison Sydney Harbour.

Christey is reacquainted with his estranged father and discovers he is involved in a dangerous scam.

Quinn is forced to re-evaluate the meaning of friendship when he alienates his workmates, as he defends a friend's lies and criminal behavior.

Knowing that a great job is coming her way, Blakemore resigns prematurely and takes the opportunity to tell everyone exactly what she thinks of them.

Reilly crosses the line and unknowingly sparks a murder when he helps his sister's husband avoid jail.

Reilly is forced to cover up the murder of a criminal to save his family.

Hawker remains the professional police officer, even when he is targeted by a criminal. But when the vendetta involves his son, Hawker shows his true colours.

Donna is taken hostage by a convicted killer. Alone, she is forced to rely on her wits and her training to save her life.

The Rats attend a wake. As the alcohol flows, so do the stories and, one by one, their true feelings are revealed.

Christey's daughter is given a brutal introduction to the realities of police work, while the death of a girl in a hit-and-run jet-ski accident causes disturbing memories to resurface for Alex.

Alex's life is a nightmare as she battles an obsessed admirer, her mother and the flu.

On the eve of Gary Sykes' wedding, the rest of the Rats admit to their true feelings - one is dumped, one is given an ultimatum and one is kissed.

Alex and Mick race against time when someone is distributing guns that are rigged to explode when fired.

Things backfire for an old friend of Alex's, when he begs her to find his missing son-in-law.

After a shooting on a Harbour wharf, the Rats discover a love triangle of Russian immigrants and a Cold War in sunny Sydney.

A young troubled boy places a wedge between Jack and his daughter, Sophie.

Alex and Mick try to solve an old burglary and murder whilst battling a retired cop seeking redemption for years of humiliation.

Alex and Mick chase a triple killer through the streets of Sydney.

Alex and Mick investigate the case of a four year old boy found at the bottom of the harbor.

The new boy at the Water Police, Gorgeous George Newhouse is making waves with the women, but Christey is not impressed.

Trying to prevent a full-scale turf war comes at a heavy price for the Rats.