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22 Episodes 2000 - 2000
Episode 1
A sassy new operative arrives at the unit just as the group go undercover to entrap a gang of teenage thieves but a mistake leads to a kidnapping, placing everyone in jeopardy. Mac's excitement over her promotion is tempered by potential life-altering news.
Episode 2
Church goes undercover into the world of stolen art and must grapple with some of the conflicting emotions which have shaped his character and behaviour when he discovers that the target abuses his son.
Episode 3
A well-planned sting goes horribly wrong when Church infiltrates a criminal gang who are intent on robbing a very large bank. Following the operation, Mackenzie makes a decision to visit her parents.
Episode 4
Angie's assignment is jeopardised with the unexpected arrival of her sister. Should the sting be called off in the light of unexpected family interference? Mac is faced with a crisis when she discovers that Danni is involved with an underworld associate.
Episode 5
Danni's future with the unit is on the line when her ex-boyfriend becomes the prime suspect in a horse-doping scam
Episode 6
Hollister asks Mac for help to capture master bank robber, Marty Stockwell. He fatally shot one of Hollister's men and now he wants revenge, so Church and Danni go undercover at a wedding to try and out-wit Stockwell and bring him to justice. Meanwhile, Mac is about to learn whether or not she is HIV positive
Episode 7
In court, things go horribly wrong when the prosecutor is forced to withdraw the charges against Tony Howarth for the shooting of Bernie Rocca. Once again, Church is under fire from Internal Affairs as his past comes back to haunt him when he is accused of using excessive force to obtain a confession. Mac puts Dani and Angie undercover in a pub under the guise of investigating the trade of stolen computers.
Episode 8
Church becomes involved in a young boy's life after he catches him trying to steal his car and uses him to expose a car stealing racket. Meanwhile, Angie reluctantly agrees to go undercover to expose a dentist accused of assaulting his female patients.
Episode 9
After three backpackers are murdered, Stone is sent into a hostel to investigate Evelyn Leigh, where his emotions nearly cost him his life. The death of Church's father gives him the opportunity to reflect on their relationship.
Episode 10
Mac and Church must infiltrate a neighbourhood residents' group who are protesting the overturned conviction and return to the community of a local teacher recently convicted of the murder of a young student. Opinions among the crew are divided over the merits of defending a killer released on a technicality but there is little choice after an attempt is made on his life.
Episode 11
When Church conducts a sting on a bikie gang, a simple gun deal becomes complicated when Church is hired to do a hit.
Episode 12
After serving fourteen months undercover in a bikie gang to break an amphetamine ring, Steve Devlin is assigned to the Stingers team. Suffering obvious signs of PTSD, he has trouble reintegrating into the force, despite Mac's best efforts. As Devlin's fate unfolds, the feelings of the team are explored through their counseling sessions.

Episode 13
When Church strikes up an unlikely friendship with a hitman after preventing him from killing himself, he is drawn into the middle of a heated triangle with no simple solution. Danni encourages Angie to stop watching and actually talk to her Mr Right.
Episode 14
Danni learns the meaning of betrayal when she is forced to use an innocent person to solve a murder.
Episode 15
Mackenzie faces a dilemma when Detective Inspector Bill Hollister is revealed as a regular client at an illegal brothel which is the subject of a sting.
Episode 16
Danni and the rest of the UCs are called in when a well-known career criminal turns Crown witness under unusual circumstances.
Episode 17
Mackenzie's past comes back to haunt her when her adopted brother is released from prison.
Episode 18
Angie is stalked by an obsessed admirer as she works undercover to expose an armed robbery ring.
Episode 19
Church must put his career on the line when an old Academy buddy is implicated in a homicide.
Episode 20
A personal favour from Church becomes a case for Undercover when an illegal organ-trading scam is exposed.
Episode 21
The undercover unit are assigned to investigate a five-year-old unsolved bank robbery with only one most unlikely suspect. Danni and Oscar go undercover but when the situation changes there are tragic consequences with one of the team being shot and left in critical conditio
Episode 22
Mackenzie and Angie face an Internal Affairs investigation when an informant suicides after being pushed to the brink. However as Angie investigates further there are suspicious curcumstances surrounding the 'suicide.' At the same time the undercover unit are still trying to come to terms with the consequences of the shooting of one of their team