The Tactical Response team investigate an attack on a police helicopter and multiple car bombings, however only after time passes, they realize it is all part of a cunning plan to rob a money-holding accommodation, learning this the teams pursue the case.

Tactical Response attempt to find a sniper on the run, with an city under fire, the teams swiftly respond however struggle to find a reason for the gunman's actions.

As Lawson's growing obsession with the robbery crew threatens to pull Tactical Response apart, Josh shows his leadership as TR2 assist Drug Squad with the arrest of a drug importer. But things aren't as simple as they first seem when TR discover the offender's niece has been kidnapped and held to ransom. Josh must race to save the girl, in the process meeting her mother, Tash, who will change everything.

TR score a lead when an ordinary civilian unwittingly implicates himself with Andrew Kronin's gang. As Lawson pushes the man to get to Kronin, Dom takes umbrage. Dom snaps, turning his gun on TR and flees. As TR 2 track down Dom, Lawson exults when he recovers a substantial amount of the heist money.

Christian is thrilled to be guarding his childhood idol, Tuvaluan Prime Minister Pell Fisher, during a visit to Australia. But the glamour of the job soon gives way to dangerous reality when it becomes clear that Pell is a target for assassination. Meanwhile, Dom's hopes of returning to Tactical Response are crushed by Lawson.

Stella, Shannon and Josh help to settle a violent ethnic dispute. Lawson, Michael and Christian are on the trail of a volatile young couple who are desperate to get married, and meanwhile, Josh receives a drunken phone call from teenager Minka, who is the daughter of Tash, and Kerry receives a surprise visitor.

Tactical Response, along with the armed robbery squad, conduct survellience on armed robber Andrew Kronin and his gang. To make things worse though, Michael's 'underground fighting' creates a dangerous complication when he is identified as a police officer by one of Kronin's men.

A runaway train ploughs through country stations on a collision course with another train. Lawson sets foot on the relentless express, unaware that he is on his own collision course with Andrew Kronin. As the final showdown beckons, Lawson will have to overcome more than just the train if he is to win back his teammates' faith.

As TR, along with the drug squad, work to catch a well known drug gang, Kerry's efforts to save Blake, a meth cook and reformed drug addict becomes personal when, devastatingly, she finds out that her son James is battling his own addiction. Meanwhile, Josh finds himself fighting for his life when an unknown man breaks into his apartment and tries to kill him.

On Shannon's first day as a Sergeant, her confidence is hurt after a juvenile delinquent steals the TR02 vehicle, however while pursing the criminal, she discovers he is easily avoidable. Tragedy strikes and Stella discovers she's pregnant.

The Tactical Response team becomes involved in stopping a weird hostage situation, meanwhile, Audrey discovers Michael slept with Stella in the aftermath of her miscarriage.

A terrifying cyber assault on the city brings Josh and Tash together as they race against time to save the life of a badly injured woman. As the attacks increase in severity, Leon and Audrey must call on all their know how as they battle a faceless opponent who may be more than a match for them.

When Andrew Kronin stages a brazen escape, Michael struggles with past demons as TR hunt down the armed robber and murderer. Burning for revenge, Michael is helped by Lawson to come to terms with his feelings.

A group of Afghani asylum seekers have seized control of Frankston’s Peninsula Centre and taken several hostages, including the son of the Minister for Immigration. With the siege now in its thirty-third hour, TR’s stamina is put to the ultimate test as Lawson starts to question the integrity of his key interpreter.

TR go bush for a routine training exercise. Unbeknownst to Lawson and Josh, the younger members of the squad soon find themselves at the mercy of Oliver Ginsberg, who has rigged the forest with deadly traps.

When they discover Ginsberg is on his way to the city with a van full of explosives, they realize the worst is yet to come...

Tactical Respose race into town, on the hunt for Oliver Ginsberg. They learn that Ginsberg has placed a very large bomb under the city and that he has plenty more deadly tricks in store for them. Lawson finds himself in an awkward position when he must work with Dom, now a member of the bomb squad, to defuse the bomb.

The team finds a special way to honor their mate. Stella gives Lawson a hard time about not wanting to say anything at the funeral.

Kerry is shocked when her son James is arrested for assault on a flight from Vietnam. When the car they are travelling in is run off the road, James sees the men in the other car and runs. Kerry and TR then find themselves in a race against time to save him from two violent drug runners.

TR embark on an unusual and confronting assignment when they must remove a newborn baby from its mother as part of an intervention order. When the mother's family murder a police officer in retaliation, TR find themselves resorting to extreme tactics to catch the men responsible.

The team find themselves in unfamiliar territory when Christian is taken hostage during a siege at an army barracks. Christian's philosophies are challenged when his captor forces him to choose between killing a guilty life or saving an innocent one.

TR find themselves having to work with a slick, well-run private security firm to save the life of a kidnapped businessman. But is their leader, Michael Shmitt, all he is making out to be or does he have other plans in mind?

Josh's proposal to Tash is interrupted when ESD storm Tash's house and arrest him. Facing charges of corruption, Josh realises that his arrest is closely linked to the earlier attempt on his life, as he strives to clear his name once and for all.

The members of TR are called to a mysterious island in response to a distress call. When one of them is injured, they find themselves in a race against time to not only save their colleague, but to find out who else is there with them and make an arrest.

After the assassination of the Victorian police minister, Kerry appoints a new task force, Cicero, in order to find those responsible. How will Lawson and the team react to new boss, Charlie Lewis?

The assassination of the Police Minister and a war brewing on the docks throws TR into the centre of a major new task force investigation. Secondly, Shannon keeps a shocking secret from Lawson and the team during an assignment to protect a woman...

Shannon struggles to overcome the impact of a personal crisis, and must face her demons in order to save a woman’s life.

Lawson challenges Charlie’s authority to pursue his own agenda with the Marauder bikies while the rest of the team protect a journalist under threat.

Headstrong Kerry is dismissive of her own safety but when the threats are redirected to her son, her anger at the perpetrators can't be contained.

Michael has been a busy man since being fired from Tactical Response. Thanks to the squad's head honcho Kerry he's now undercover, and his job is to bring down the Raineys, a family team of cocaine importers. He sets up a buy-bust meeting in order to bring the Raineys down and coaxes Josh into becoming his wingman. The trade-off location changes at the last minute and whilst TR catches some of those responsible. Col Rainey has taken Michael and gone underground. Has his desire to prove himself to everyone put his life in serious danger? Meanwhile, Shannon finds herself face-to-face with her attacker.

Tactical Response goes into overdrive as they desperately try and to locate Michael after his undercover buy-bust goes horribly wrong. Josh starts to crumble under the guilt of letting Michael get away while Stella is furious, realising her best friend, and once lover, may not come back alive. It's a race against time as Kerry fights political red tape and the remaining members of Tactical Response do anything they can to get one of their team back safely.

Senior Constable Michael Sandrelli remains in intensive care whilst Tactical Response are left to pick up the pieces. Meanwhile, Shannon lets her emotional guard down.

Tragedy can have a profound effect on those involved. Everyone has different coping mechanisms, and Tactical Response continues to reel from a tragedy within their own ranks. Stella can barely build up strength to face the day and Christian appreciates a comforting presence from Amber. Josh, feeling responsible and immense guilt from what has happened, goes underground, deliberately avoiding contact from anyone at TR.

The Tactical Response team continue their search for the man they believe is responsible for both the Police Minister and Michael's murders, as well as Josh's possible disappearance. They find out that he steals identities off people as a means of not being caught out, and Lawson has to make a big decision in order to catch him.

With a renegade Josh risking everything to find Michael's killer, the team finds themselves chasing one of their own and are forced to confront the question of how far they'll have to go to stop him.

Tactical Response find themselves up against a carefully planned manoeuvre when Lawson and others are taken hostage by the Cuckoo as part of an escape attempt from a military courtroom. As part of the team negotiates for Lawson’s freedom, Josh and Stella follow their own investigation: searching for a bomb.

As the bomb squad work to defuse a bomb, the team are tasked to fly to Fiji to extradite a South Korean National back to Australia. Shannon also responds to Lawson's marriage proposal, sort of.