- 1
Thin Ice
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.
- 2
An Anonymous Guy
Angie has to develop a romantic relationship with a murder suspect and then coerce him into becoming an informant.
- 3
Cash on Delivery
Danni's determination to go it alone with her pregnancy clouds her professional judgement when she stumbles across an illegal adoption racket.
- 4
What's Love Got to Do with It?
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.
- 5
A Little Crush
Stone cultivates a live-wire young prostitute named Brittany to get information on a dangerous drug criminal.
- 6
No Promises
When Church is sent under cover to share a cell with a convicted murder, Danni must face the toughest decision of her life alone.
- 7
Mule Train
Angie is forced to bend the rules as she attempts to prevent her sister Sam from being arrested on drug importation charges.
- 8
White Ants
Danni has to protect former undercover cop Gary Edgerton and help prepare him for a court case where he is the reluctant key witness.
- 9
In the Gun
Stone investigates a woman who may be organising a hit on her husband, while MacKenzie is dealing with hit men of a different kind.
- 10
In Plain View
Angie and the rest of the Undercover Unit rally around MacKenzie, risking their jobs in order to prove her innocence.
- 11
Fatal Flaw
With Harry Love in a position to make his final move against MacKenzie, she and the other Undercover have to take desperate action.
- 12
Trust
Angie goes undercover to bust an armed robbery ring but her romance with informant Marty Engle places them both in dangerous territory.
- 13
Big Fish
Stone and Church go undercover to investigate a pair of teenage drug manufacturers, with unexpectedly tragic consequences.
- 14
Demilitarized Zone
Stone is abducted when Undercover fails to bust an international arms dealing ring that is run by lethal ex SAS officers.
- 15
Blow Off
When a failed drug bust leaves Undercover with a dead dealer and a high class prostitute holding a couple of bags of cocaine, the Unit undertakes an operation inside a busy brothel.
- 16
Inside Man
When an undercover operation causes the death of a young woman, Church and Angie are faced with the dilemma of saving one dangerous criminal from another.
- 17
Mind Games
The Unit's attempt to trap a serial killer leaves MacKenzie fighting for her and her best friend's life.
- 18
Disgraceful Conduct
Stone is set to expose a high powered businessman trading cars for heroin when he discovers a young prostitute he has cared for is in danger as a result of his actions.
- 19
Smoke and Mirrors
Church becomes convinced he is being stalked by a man who holds him responsible for the murder of his girlfriend.
- 20
Too Much Information
When the Unit try to nab a standover man for murder, Angie's relationship with an informant causes a confrontation within the ranks.
- 21
Pale Horse
The unit seems on shaky ground when Homicide attempt to charge Church with murder, but are devastated when Stone goes beyond the call of duty to save Church.
- 22
A Girl's Best Friend
MacKenzie is faced with a choice between her personal happiness and her successful career when she becomes involved with a charismatic art thief.