After rescuing two children, Josh's rage spills onto their father, who may have attempted to kill them. The new inspector challenges Josh's position on the team

Josh, Grace and Michael investigate when an alarm is going off at a high-security laboratory. They find that an animal rights activists group calling themselves 'Freedom From Torture' has freed almost all of the research animals from their cages. Michael is bitten by a monkey who is later found to have herpes

Michael is found cleared of the herpes. The team arrives at a big surburban party and find a group of teenagers have stolen a gun from a security guard. Stella and Michael then go undercover to try and retrieve the stolen weapon. Michael then saves a high school boy from being severely beaten by kids from a rival high school

After a nasty domestic dispute, the TR team are called to look for a man, who has hospitalised his wife after an argument. The team reveals he has a gun, as-well as his son. Lawson has the job of calling him down from a rooftop.

TR is given the responsibilty of protecting an underworld figure, who is testifying in court. A decoy is used, with an actor playing the man, but it goes downhill after the actor is shot dead. Serveral more attempts were made, and Kerry comes up with a unique way of protecting the man. Josh takes the man by himself, but is later cornered by the people trying to kill the underowrld figure. As they leave, TR shows up and the men are arrested. The episode ends with Micheal kissing Stella as she sleeps, and Kerry and Lawson having a conversation about the report on TR that Kerry wrote

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.

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.

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.

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.

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.