A politically ambitious LAPD captain comes up against a streetwise detective who isn't above bending the rules in his effort to fight crime as he enriches himself and his men.

Following the shooting death of a police department informant, Aceveda turns up the heat in is investigation of Mackey and his Strike Team.

Vic imprisons a basketball star to influence the outcome of an upcoming game; Dutch and Claudette nab a egotistical rapist out to impregnate as many women as possible.

A dispute over an up-and-coming singer's success erupts in a gang war that threatens to bring Vic down, too; a case that could help Aceveda's political future sends Dutch and Claudette searching for a missing day laborer.

Mackey must recover the stolen evidence from a drug bust before Aceveda is able to pin he theft on him.

As Dutch's theory about a serial killer preying on prostitutes proves true, he convinces Aceveda to launch an all out effort to find him before he strikes again; Julien decides to bring down Vic for stealing drugs.

The murder of seven gang members has Vic be teamed with a Latino detective assigned to crack the case.

As the Strike Team is reassigned pending the investigation in the theft of evidence, Vic teams with Claudette in order to keep some deadly drugs off the street.

Lemonhead sets out to make things right following his shooting of an unarmed man.

As Dutch uncovers a lead to the serial killer, a reporter questions force Aceveda to explain problems he thought were buried far in the past.

A confrontation between a local drug dealer and Black Muslims places Vic in danger of being exposed.

As a deployment policy leads to a double homicide that places Aceveda in the hot seat with potential voters, Vic is forced to help Gilroy avoid being implicated in a hit and run.

As cop killings strike Farmington, Aceveda is caught between two corrupt cops looking to save their own skins.