Two new recurring stars Blair McDonough and Jessica Napier played a married couple, Matt and Simone Robsenn who are the local dive masters.

HMAS Hammersley is dragged into a web of murder, piracy and eco-terrorism, when valuable "Red Gold" coral is stolen from a dive boat.

When an FFV is spotted approaching one of the rigs the fear is terrorism, but upon boarding the boat the crew finds a lone fisherman who has been badly beaten and tied to the wheel.

ET is clearly upset by the man's death and later tells Nikki that he has decided to leave the NAVY to work for a local dive Company, meaning they can be together at last, and he asks her to marry him.

Nikki is suspicious as ET has not reported back for duty on the ship, and the worst fears are realised when the crew finds all eight divers washed ashore dead, among them the body of ET.

Swain and Spider stay aboard to steam the FFV back to Cairns, but their journey is suddenly interrupted by a band of eco-terrorists who are hell bent on revenge on all foreign fisherman.

When valuables start to go missing the crew blame 2-Dads for the theft, he tries to protest his innocence all the while knowing the real thief is in fact, the monkey.

Kate is immediately suspicious that the women are being smuggled into the sex trade, and tries everything in her power to find an alternative to simply turning the boat away, knowing they will try again as soon as Hammersley is out of sight.

In an effort to make up for her inability to help the women on the boat, Kate goes out of her way to trace the family of the orphaned baby, but her investigations lead her straight to the people smugglers.

The resulting pursuit and apprehension of the smugglers gives Swain the chance to work out some of the anguish from the death of the mother, and finally reunites the baby with his aunt.

Kate fears her past relationship with Mike will become public knowledge when an ex-Naval Lieutenant is rescued and brought aboard, but his presence on the boat leads to shocking consequences for the crew, and in particular Charge.

2-Dads is none too happy when he is forced to give up his winnings from a recent poker match to help pay off the damage RO has caused and the pair immediately come to blows.

Hammersley hunts down a mysterious gang of armed robbers who are terrorising pearl luggers off the WA coast, but is there more to the attacks than meets the eye.

But when he tries to retaliate by starting rumours that Kate and Buffer are romantically involve Mike is forced to intervene, and he ends up in more trouble, and facing possible dismissal from the NAVY.

Hammersley is stranded in a deadly minefield after being attacked by heavily armed smugglers, and the NAVY call out one of their mine sweepers to assist with the clear-up.

Forced to go after her, and based on a best guess, they find her camp on nearby Penfold Island, and come across the proof that her story may hold credit – a photograph of ET taken the day before he died.