STINGERS

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.

Following the drug-related death of a young clubber, the unit attempts to crack a large scale Ecstasy racket.

MacKenzie is put undercover on the witness protection scheme to befriend a victim of attempted murder because of her connections with a leading politician who is suspected of corruption.

While taking part in a buy/bust, Church and his dealer inadvertently get caught up in a siege instigated by three teenage criminals.

The Professional Integrity Unit investigates undercover over claims of corrupt handling. After evidence leads to Rocca's suspension, the unit wants to know what's going on.

Church is forced to drop his longtime informant, Benny. Benny is outraged, but as a last hurrah, he gives Church information about a planned armoured van robbery.

Working undercover with bikies, Church sets up a buy/bust which turns sour after Stone is bashed and falls into a coma. Emotions run high as Church is forced to remain undercover.