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.

While investigating the murder of a friend, Church loses Angie's Heart to his boss, Luke Harris.

Church and Angie penetrate the liberated world of swinging couples and find that love really is a drug.

Church fakes the murder of a security guard to infiltrate a Jewish crime family.

Chris' relationship with a lesbian clubber turns to tragedy when her lover is suspected of murder.

The unit discover a renegade young detective who has all the qualities to become the new undercover recruit.

Rookie Leo Flynn bites off more than he can chew while investigating a drug war between two rival ice-cream vendors.

Harris takes an impulsive trip to Singapore in an attempt to win Angie's heart and protect her from Internal Affairs.

A young deaf girl arrives at PHQ declaring she's Church's daughter. When Harris uses her to solve a crime, all hell breaks loose.

The undercover unit simultaneously pursues a European war criminal and her drug dealing son.

A sexual indiscretion of Harris' comes back to haunt him when Church is hired to kill him.

Church makes a dangerous call when faced with a conflict of loyalty between Harris and his old boss, Bernie rocca.

Flynn endangers his life and that of his pregnant sister on a deadly assignment with two cop killers.

Chris risks her life to sting a sadistic chef for murder.

Church is hired at a furniture removal company suspected of a drug Courier business.

Masters goes undercover in order to bust a racehorse stealing, coke dealing porn king.

Church goes undercover as a spiritual medium to hoodwink an international gun runner.

Sophie takes Church to lunch with two of the state's biggest criminals. But will the meal be church's last?

While playing nanny to the daughter of a suspected hitman, Chris is horrified by the child's revelation.

Leo finds himself in deep trouble with a group of armed robbers while Harris is having his own problems.

Harris is blackmailed by an adversary from his past who threatens to reveal his fire psychiatric disorder. Meanwhile, Angie receives a proposal of marriage.

Harris' blackmailer has more tricks up his sleeve which puts Angie's life on the line.

Bi-polar, confused, gun-toting, groom Luke is a bundle of nerves - but not over the big day.

Church unwillingly agrees to play Cupid for an informant and his estranged wife, until she is murdered.

Flynn finds himself in a treacherous love triangle when he is seduced by colleague.

A teenage love affair puts one of the team's children at risk on a major drug job.

Things quickly become more complicated in Angie and Luke's marriage.

Eight months have passed since Chris was shot by an unseen gunman, but the shooter's identity is still to be found.

Church goes undercover as a hitman in a desperate attempt to save a kidnapped girl.

Church's efforts to nail a high profile people smuggler are thrown into chaos by a rogue homicide detective.

Flynn wakes up in a hazy, drug-induced state next to the dead body of a prostitute.

A drug dealer offers to act as an informant in his father's drug organization. However, he has a condition: Chris must go on a date with him.

Despite agreeing to help her, Church is not convinced that he can trust the daughter of one of his informants.

Working undercover, a masked Leo is forced to steal the proceeds of an illegal poker game - and the main players happens to be none other than Peter Church and Brian Gray.