Stingers Season 4

As Church, Danni, Stone and Angie focus on a drug sting, MacKenzie is distracted by an invitation to apply for Head of Homicide - which would mean leaving the Undercover Unit.

Church's worlds collide when he has to attend his twenty year high-school reunion as part of a drug sting.

Stone is caught in a siege situation at a hospital when an armed robbery goes horribly wrong.

The Unit works with an undercover operative from Queensland to defeat a gang of amphetamine dealers responsible for a kidnapping.

MacKenzie makes contact with her natural mother and both women become embroiled in an Undercover operation to nail a mastermind armed robber.

MacKenzie investigates a Private Detective who specialises in adoption cases, with the secret hope of locating her birth mother.

Strange guns, UFOs, and piggerists with glass eyes - it's all in a day's work for Church, when his only source of information for a possible murder case is a paranoid schizophrenic.

A case of mistaken identity results in Stone being recruited to assist with a major armed robbery.

Danni's cover is blown and her career is threatened when an escaped criminal seeks his revenge.

The Undercover Unit stage an intensive investigation to nail the ex-police officer believed responsible for Bill Hollister's murder.

Stone is recruited by an Assistant Commissioner to assassinate the Bomb-maker responsible for Bill Hollister's death.

The Undercovers investigate an extortion attempt against a pharmaceutical company and find themselves at the centre of a long-term feud.

The Undercover Unit investigates a group of paedophiles who use an internet chat-room to procure their victims.

Church and Danni pose as foster parents in an unusual operation to capture Australia's Most Wanted Armed Robber.

In the aftermath of Bill Hollister's murder, MacKenzie grieves while Church tries to bring the killer to justice.

The future of the Undercover Unit looks uncertain when Stone is investigated for the shooting death of biker Chicken Lake.

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

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

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

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

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

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