Stingers

When a Homicide investigation into the disappearance of a teenage babysitter fails to reveal any useful evidence, Church and Angie go undercover to infiltrate a sinister criminal family.

Someone is looking to hire a hitman, so Church goes undercover. Surprisingly, his client is a woman who claims that her husband is trying to kill her. She wants him dead before he succeeds.

A policeman has been shot. Undercover is called upon to infiltrate a suspected Romanian gang, but they don't deal with outsiders. Rocca must rely on an ex-undercover operative who could potentially jeopardize the job and the unit.

Undercover is called in to find a serial killer. When Angie's cover is blown, Kaye becomes her replacement. Her first solo job is going well until all contact with her is lost and she vanishes.

Following Kay's disappearance, the Unit goes into damage control, scrutinizing the surveillance footage and following up on the few leads they have - a process that provides an unexpected suspect.

Whilst undercover, Church is employed by a brutal mercenary, Cameron Fraser, to assist in the abduction of a young girl. After a botched attempt, Fraser successfully tails Church, putting the security of the unit at risk.

Stone and Angie go undercover to investigate the murder of a young Asian woman involved in the X-rated movie business. MacKenzie receives a compromising photograph relating to her former relationship with Church.

The compromising photograph of MacKenzie and Church threatens the security of the entire unit. Church pursues the source of the photos while Angie and Stone push for more information on the Porn Star murderer.

Church works undercover as a safecracker to find out the target of the robbery, discovering that the gang have a one-off, get rich quick scheme.

Rocca finds himself in unfamiliar territory when he goes undercover with Church on a case involving gold smuggling and political intrigue.

The Unit pull off a successful cocaine bust, leaving drug lord, Bryce Forbes, wanting revenge. Acting on information supplied by Forbes' lover, Heather, Stone is sent undercover to infiltrate the drug lord's operation.

MacKenzie goes undercover in a woman's prison. Her target is Nancy, a young woman convicted of murdering her husband, who embezzled millions of dollars in an investment scam. The Unit's aim is to recover the money.

A sassy new operative arrives at the Unit just as the group go undercover to entrap a gang of teenage thieves. However, a mistake leads to as kidnapping which places everyone in jeopardy.

Church goes undercover into the world of stolen art. When he discovers that the target is abusing his son, Church's repressed memories of his abusive father are triggered and he must grapple with conflicting emotions.

A well planned sting goes horribly wrong when Church infiltrates a criminal gang who are intent on robbing a very large bank.

Angie's assignment is jeopardised with the unexpected arrival of her sister. Mac is faced with a crisis when she discovers that Danni is involved with a suspect.

Danni's future with the unit is on the line when her ex-boyfriend becomes the prime suspect in a horse-doping scam.

Hollister asks Mac for help to capture master bank robber, Marty Stockwell. Hollister wants revenge after Stockwell fatally shot one of his men. Church and Danni go undercover to bring Stockwell to justice.

The Undercover Unit is called in to investigate when eleven illegal immigrants are found dead inside a shipping container.

Church uses an informant to infiltrate a drug syndicate, with tragic consequences.

Angie goes undercover at a halfway house to obtain evidence against a psychopathic killer.

Church and MacKenzie pose as a married couple experiencing relationship difficulties as they investigate a murder.

Church becomes the prime suspect in a murder investigation when he moonlights as a private investigator.

Church goes undercover in a bikie gang to expose a major amphetamine ring, with unexpected and tragic consequences.

MacKenzie becomes the victim of a grifter on the eve of her interview for Head of Homicide, while Church's career is threatened when a journalist attempts to expose him.

Angie has to develop a romantic relationship with a murder suspect and then coerce him into becoming an informant.

Danni's determination to go it alone with her pregnancy clouds her professional judgement when she stumbles across an illegal adoption racket.

MacKenzie discovers the grifter who drugged her is linked to a senior colleague - someone who had good reason to want her out of the running for Head of Homicide.

Stone cultivates a live-wire young prostitute named Brittany to get information on a dangerous drug criminal.

When Church is sent under cover to share a cell with a convicted murder, Danni must face the toughest decision of her life alone.

Oscar Stone's Killer is brought to trial in a situation of high security. The accused is represented by a high profile criminal barrister, Ingrid Burton.

When Church goes undercover as an armed robber, he is busted by a young cop. Harris is so impressed that he arranges for her to join Undercover for a trial period.

Church's undercover assignment results in the kidnapping of a drug dealer's son. Meanwhile, Chris finds herself on what appears to be a routine surveillance job at a video store.

An undercover attempt to sting a drug distributor results in tragedy, with accusations made against an undercover operative.

Harris sends Chris undercover to infiltrate a violent gang of brothers despite Church's reservations about her inexperience.

A middle-aged woman, Helen, brings a cardboard box into police headquarters claiming it contains a bomb.

Church's determination to find Ingrid, missing for seven days, brings him into conflict with his colleagues.

An undercover operation investigating stolen art reveals black market dealings.

Harris' attempts to teach a mate a lesson in crime and punishment backfire with disastrous consequences.

When Angie is hired as a nurse by two brothers, she's forced to go on a job without back-up.

Chris' future is jeopardised when she's forced to shoot a former squat mate.

The team lose a colleague when a hostage situation erupts at Police Headquarters.

Flynn's old flame guides him deep into the world of body art, heroine and murder.

Chris suffers body blows when she is the forced to fight with her fists to nail a big time gangster.

Harris and Angie's son, Joshua, is abducted in a tragic case of mistaken identity.

Angie goes undercover to hunt down a serial killer who is praying on a popular tourist hotel.

Church risks radiation exposure in a desperate attempt to avert the detonation of a dirty bomb.

A stalled murder investigation forces Flynn to go undercover in a Middle Eastern consulate.