An attack on a police helicopter and a series of car bombings appear to be unrelated events until it emerges that they form part of an elaborate attempt to rob a cash-holding facility.
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.
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.
Back on the job with Tactical Response, Stella helps to settle a violent ethnic dispute. But when one of the offenders takes a special liking to her, she's forced into a dangerous situation that truly puts her courage to the test.
As Tactical Response gather to move on armed robber Andrew Kronin and his men, Michael's foray into the world of underground fighting creates a dangerous complication.
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 Tactical Response works to bust a notorious gang, Kerry's efforts to save a meth cook and reformed drug addict becomes personal when she discovers that her son, James, is battling his own addiction.
In her first day as a Sergeant, Shannon's bubble is quickly burst when TR2 is stolen by a juvenile delinquent with more than a few tricks up his sleeve.
Lawson's nemesis Andrew Kronin escapes from a police van on his way to court & the TR team take off in hot pursuit but Michael finds the ordeal tough. Meanwhile, Shannon gets ribbed for lack of a sex life.
Tactical Response 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.
Tactical Response 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.
After the death of their mate Dom, Tactical Respose honour him in their own special way. Kerry is shocked when her son James is arrested for assault on a flight from Vietnam.
Tactical Response embark on an unusual and confronting assignment when they must remove a newborn baby from its mother as part of an intervention order.
The team are forced to work with a slick private security firm to save a kidnapped businessman. Working closely with its charming leader, Shannon is enticed by the prospect of joining the firm.
TR fall into the clutches of darkness as they chase a murderer across a desolate island. As they attempt to restore order, one of their own becomes victim to the island's mysterious power.