The crew of Hammersley is rocked by the mysterious death of a much-loved shipmate. When valuable "Red Gold" coral is stolen from a dive boat, HMAS Hammersley is drawn into a web of murder, piracy and eco-terrorism. Then, Swain and Spider are kidnapped by an obsessed vigilante, determined to rid Australian waters of illegal fishing boats.

Hammersley is tasked with protecting a shipment of nuclear waste from a terrorist attack. When a bomb is discovered on board, Robert and 2 Dads must set aside their differences to save Hammersley. Buffer falls victim to a practical joke and Robert is tricked into going on a drunken date, with disastrous results.

Awaiting a call from his girlfriend, Buffer's attention is distracted by the Russian Special Forces tattoo on an aggressive passer by, which leads him to be inadvertently locked in a container on a suspect barge, heading upriver. Meanwhile, Commander Mike Flynn has recovered and is back in charge of the Hammersley, quickly reacting to a "mayday" call from the luxurious yacht owned by Ray Walsman.

Kate is terrorised by a mysterious stalker on board an abandoned cargo ship. Spider contracts deadly coral poisoning during a bizarre snorkelling accident and Buffer and 2Dads face a freezing fate in a tropical paradise.

Hammersley hunts down cattle rustlers behind the hijacking of live cattle shipments. Robert takes desperate measures to be seen as a team player by his crewmates, and Bird is terrorised by her ex-boyfriend.

Buffer becomes a marked man after providing evidence allowing the Hammersley team to arrest Ray Walsman, and among a team of UN observers later taken on board, is one man with murderous intent. Walsman meanwhile has escaped, but a quick thinking Mike has him back in custody.

A change of command on HMAS Hammersley results in divided loyalties and the humiliation of the ship's most senior female officer. After a dangerous departure from Samaru, Commander Mike Flynn is recovering in hospital.

Bomber Brown and Spider Webb fall overboard and as the man of the watch, Buffer takes it hard that the two missing officers might drown. Meanwhile Buffer also deals with a personal tragedy.

Unresolved romantic tension has a dramatic effect on some of the Hammersley crew, after a savage mortar attack by insurgents on the Samaru island of Minatu. Mike and Jim are both critically injured during a bold rescue mission on Samaru. Meanwhile, Kate is made acting CO of the Hammersley. It’s up to Kate to handle a volatile beachside confrontation, and the medical evacuation of Mike.

Tragedy rocks HMAS Hammersley as the crew races to prevent a terrorist attack on a busy Australian port. Meanwhile, Kate and Dutchy discover ingredients for a radioactive 'dirty bomb' are being smuggled into Australia on illegal fishing boats, and Mike is stunned to realise SAS Officer Jim Roth has proposed to Kate - will he let the woman he loves marry another man?

The crew find a boy who has found a cache of guns. The boy is later kidnapped which ends up ruining a date for Kate and Jim. Meanwhile, one crew member faces losing the love of his life.

Mike is tortured and faces death when he is captured by a ruthless gang of drug traffickers. Dutchy and the crew vow revenge when one of their mates is presumed murdered. After realising she has no romantic future with Mike, Kate makes a fateful decision about her career.

In episode three of Sea Patrol, the plight of a critically ill, pregnant woman presents a challenge to the medical skills and emotional stamina of several of the Hammersley crew. Yanlin (Hsiao Ling Tang) is one of a group of Asian women found when the patrol boat team boards a suspect fishing vessel.

Nikki starts investigating the mystery behind ET's death. But can she handle the truth? Swain risks his life to save a boy suffering from the bends. Spider tries to free a child slave from an illegal fishing boat, but lands himself in hot water. Tempers fray when Hammersley rescues an old enemy following a bizarre diving accident.

An ugly hostage situation on board HMAS Hammersley sees two of the ship's female officers taken hostage below decks. It’s a day of high tension, which begins when a group of shipwrecked illegal immigrants is rescued from a sand bay. Along with Afghan refugees, and a chronically ill Asian girl, are three super-fit Eastern Europeans who waste no time once they are safe on board.

Mike and Spider are taken hostage during a shoot-out with weapons smugglers. Kate fears her past relationship with Mike will become public knowledge. The Hammersley rescues a former Navy officer lost at sea, with shocking consequences for the crew

The Hammersley races to save a boatload of tourists from being murdered as part of a bizarre terrorist publicity stunt. Meanwhile, Swain and the crew help deliver the baby of a runaway teenager, found lost at sea with her criminal boyfriend. A series of emergencies at sea prevent Swain from attending the birth of his first baby.

A kidnap drama on the ocean and relationship tremors below decks rock Hammersley as she sails the Coral Sea.

The crew uncovers a people smuggling racket, when they almost collide with a floating shipping container full of North Korean refugees. The Hammersley races to capture the smugglers’ ship and save the lives of their human cargo. Kate is wooed by a charming civilian sailor. Meanwhile, Mike is determined to solve the mystery of Ursula’s disappearance.

Robert fails a drug test but is determined to prove his innocence. Meanwhile, the Hammersley uncovers a smuggling operation by Samaruian rebels which is designed to destabilise the government.

The Hammersley attempts the daring capture of an illegal fishing ‘mother ship’ but is thwarted by violent eco-terrorists. Mike finds himself falling in love with beautiful marine biologist Ursula Morrell, who later goes missing under mysterious circumstances.

Dutchy and the crew are caught in a deadly fight for survival when a training exercise turns into a manhunt.

When HMAS Hammersley answers a distress call from Bright Island, Captain Mike Flynn and his crew discover a young woman lying paralysed on the beach. She is conscious but unable to talk, and despite their best efforts they are unable to save her. Thus begins new Executive Officer Lieutenant Kate McGregor's first day aboard a patrol boat, and CO Mike Flynn's obsession with the mystery of Bright Island. Something very odd is happening in connection with the Island. The Federal Police move in to investigate the woman's death, but no-one is talking. Her colleague, the striking Doctor Ursula Morrell, seems to know more than she's letting on, and Mike finds himself drawn to her cool beauty and her vulnerability.

Dutchy finds himself the prime suspect in a cold-blooded murder after he rescues a beautiful young woman. The Hammersley rushes to save a professional diver trapped in a shark cage.

Dutchy and Charge take drastic action to catch two prison escapees on a remote island. Hammersley rescues a kidnapped pilot with a dangerous secret. Charge finds himself in a psychological battle with a convicted murderer and Bird gets more than she bargained for when a routine operation turns nasty.

Mike is torn between saving the life of a missing refugee girl, and the lives of two shipmates bitten by the deadly irukandji jellyfish. While pursuing pirates, the Hammersley rescues a family of illegal immigrants from an unseaworthy ship.

Swain is obsessed with the mysterious sinking of a refugee boat. The crew uncovers a smuggling ring with a deadly method of sneaking goods into Australia, and Bird's romantic life is complicated when Mike's godson Ryan joins the crew of Hammersley.

When 2Dads goes missing on a scuba diving trip, Charge risks his life and career to find him. Mike creates a diplomatic incident when he searches a North Korean ship suspected of smuggling.

The Hammersley uncovers a sophisticated drug smuggling network, with explosive results. Mike is convinced the Federal Police are covering up the poisoning death of a marine biologist. Kate is jealous of Mike's relationship with Ursula Morrell, while Nikki struggles to restrain her feelings for ET.

After the Hammersley successfully pulls off the tricky evacuation of all the Australian citizens from an island in the Samaru Archipelago, it comes across an FFV which isn't what it pretends to be. Charge discovers first-hand exactly how dangerous his job can be. And Nikki and ET have to decide what to do now that they're working together.

A thrilling rescue becomes a tragic mystery when a healthy young tourist dies suddenly on board Hammersley. Bomber and RO fight for their lives when an armed gang tries to seize control of Hammersley. Nicki receives a death threat while investigating ET's diving accident.

Hammersley is caught in a war zone while delivering aid to a remote foreign island. Swain and Dutch risk their lives to rescue an aid worker and her sick patient from a deadly tribal feud. Mike faces a deadly dilemma when Bird is struck by a mystery illness and requires urgent evacuation.

The crew of the HMAS Hammersley come across an abondonned catamaran in the middle of the ocean, which uncovers the beginnings of a murder mystery. A sailor has gone missing and Nikki puts her navigational sklls to the test in the attempt to find them. The ship is then hit by a cyclone.

A new Commanding Officer and the discovery of a cruel and lucrative trade in crocodile skins results in some tense and disturbing moments for the crew of the HMAS Hammersley.

The crew pursues a distraught father who has kidnapped his own children. Then, while searching a crocodile-infested swamp for the missing family, the crew discovers a badly mauled fisherman.

Bird is compromised when she discovers Ryan working for a private security firm while AWOL from the navy. Mike fears his son has been murdered by mercenaries and risks his career to get revenge on the killers. A pregnancy scare forces Kate to reconsider her future.

After going on a blind date with an SAS commander, Kate believes her love life is starting to look up. When a French naval captain attempts to seduce Mike, he has to call on all his diplomacy skills. An illegal fishing boat is the subject of a perilous boarding.

A series of shocking surprises await the crew when they discover a secret community living on a tropical island. Robert risks his life to save Bomber during a gunfight with drug runners, and Mike investigates claims of an illicit romance between two crew members.

On patrol in protected waters in the Arafura Sea, a lazy comment from one Hammersley crew member to another that it's "about as routine as its gets" is the ironic curtain raiser to a day of horror. The crew of Hammersley launches a daring raid to recover a cargo of stolen uranium from armed terrorists. Kate queries Dutchy's professionalism after he injures her during a boarding party, and Mike's godson is taken hostage by smugglers.

As the decommissioning of the HMAS Hammersley draws near, the crew risks life and ship to hunt down a rogue terrorist boat and retrieve its cargo of bio-toxins. In ordering the sinking of the rogue ship, Mike makes the most difficult decision of his career.