The story of an inner-city Los Angeles police precinct where some of the cops aren't above breaking the rules or working against their associates to both keep the streets safe and their self-interests intact.
Olivia joins forces with the Strike Team to catch a Mexican drug king and his shipment. Meanwhile, Dutch cleans up Billings' mess, and the death of a woman associated with the Strike Team prompts an investigation by Claudette.
As Vic prepares to help Lem get out of the country to begin a new life in Mexico; Kavanaugh and Aceveda attempt to capitalize on the situation by using this as means to try to take down the leader of the Strike Team. Dutch decides to file for a transfer. Meanwhile, Shane tries to cut off the investigation by taking extreme measures and Danny finally confronts the father of her child.
In the aftermath of a riot, cops are being lured into ambush shootings by a rash of bogus 911 calls. Surprisingly Mackey and Captain Aceveda must work together to stop these attacks and solve the problems in The Grove, while Assistant Chief Gilroy tries to pit the two against each other to save his own job.Watch Now:AmazoniTunes
To the dismay of his friends, a weary Lem is thinking about accepting a deal from the D.A. where he has to plead guilty to the heroin charges. With no other choice, Vic reluctantly meets with Antwon in order to ensure Lem’s safety in prison. Meanwhile, unforeseen circumstances that are beyond Claudette and Dutch’s control might cause irrevocable damage to their friendship.Watch Now:AmazoniTunes
When a gang execution hits close to home for Claudette, Vic, Tavon, and Dutch work together to find the culprit before anyone else gets hurt. Shane, Lemonhead, and Ronnie are forced to choose between hitting the money train without Vic or letting it go. Meanwhile, Danny receives some life changing news and Julien's harassment reaches a whole new level.Watch Now:AmazoniTunes
Claudette notices Hiatt's mistake when he makes an arrest, and Billings delivers shocking news to the department. Vic forms an alliance with Aceveda, while he waits for his review board hearing. Meanwhile, Shane's life keeps spiraling out of control.
Via a bug planted in the clubhouse, Kavanaugh monitors the Strike Team as they investigate an illegal prescription drug ring that is proving to be deadly for the people of Farmington. While working on a missing person’s case, Dutch attempts find out what Claudette is hiding.
Kavanaugh seeks the help of Antwon Mitchell in his ongoing quest to take down the Strike Team. In the midst of this, Kavanaugh has a lot on his mind as his ex-wife reenters the picture, and he reluctantly agrees to let Vic send Emolia undercover to infiltrate a Salvadoran gang that is stockpiling grenades.
While the Strike Team ramps up their control of the streets, David tried to crack corruption in the Barn by recruiting Terry to help him take down Vic, only to result in Terry's death. Meanwhile, Dutch and Claudette investigate the murder of Nancy Reborg only to discover her missing daughter has been sold off by her addict father to a child molester.
While Shane remains holed up in L.A. with Mara and Jackson, Corinne decides to cooperate with Dutch and Claudette, who's now spearheading the LAPD effort to bring down Vic. Meanwhile, Vic plays Aceveda, Pezuela, Beltran and ICE against each other. But Ronnie's tempted to simply give up and run to Mexico. "And you should run too man" he tells Vic.Watch Now:AmazoniTunes
Kavanaugh acquires what he needs in order to apprehend Vic who is preoccupied with getting revenge on Guardo. Claudette finds herself under the political microscope as a result of the San Marcos incident, and Danny receives some news about her future at the Barn.Watch Now:AmazoniTunes
When Aceveda confirms that the Strike Team is the target of an Armenian mob hit, Mackey must take matters into his own hands. Meanwhile, Whym's career is on the line when she disobeys Aceveda's orders to put a case to rest that may prove the innocence of convicted felons.Watch Now:AmazoniTunes
When Vic discovers that Ronnie has been burned as payback, the rest of the team does everything they can to put an end to him. Meanwhile, Claudette makes headway on her investigation against Vic after a conversation with Corrine, and Dutch takes Danny under his wing as they try to find the suspect of a Thai Town beating.
With the Barn grieving over the loss of one of their own, Vic's out to avenge his friend's murder, but finds himself in the crosshairs of Kavanaugh. Claudette assigns the Strike Team to investigate the torching of a methadone clinic. Meanwhile, Julien and Tina look into a robbery/assault at a porno shop, and Dutch makes a horrifying discovery in San Marcos.
As Vic gets closer to finding his family, the Strike Team focus their attention to Armadillo after he burns down Tio's HQ. Now Vic must prevent Claudette from finding out the truth about his connection to Tio and his men. Meanwhile, Dutch is followed around by the new civilian auditor to solve a meter-maid murder, and Danny and Julien try to clear up issues between feuding neighbors.
Vic struggles with Claudette's new supervision of the Strike Team. Marked bills lead Aceveda and a federal agent closer to the truth about the Armenian money-train heist in an episode with a recurring motif of people not reporting crimes against them.
Monica, Vic and the strike team work together to put Antwon Mitchell back behind bars after his deal with the DEA released him from prison. When Vic reveals his suspicions of David's connection to both Antwon and an inmate's murder, David must protect his political future at any cost. When the murder of an over-protective father leads Claudette and Dutch back to a foster home they had previously investigated, Monica makes an unpopular decision that helps seal her fate.
Vic and Monica go head to head with Antwon, and do everything in their power to get him to admit to being involved with the cop killings. Monica is shocked when Vic and Shane confront her with the information they've been hiding regarding Antwon and Angie's body. Shane and Army wonder if they'll be able to pass the lie detector test Monica is forcing them to take. Meanwhile, after another young black woman is murdered, Dutch and Claudette hope to prove their suspicions correct with their recently relocated Texan.Watch Now:AmazoniTunes
Vic and his crew track down the Russian who was involved with the cop murders, but they lose control during his interrogation and the hit man dies in an explosion before they can get any answers. Meanwhile, Aceveda is blackmailed by the man who assaaulted him. Plus, Rawling's seizure is on the verge of being shelved.
Mackey helps Connie quit using crack cold-turkey in her desperate attempt to keep her son, leaving Vendrell and Lemansky to investigate a strip-club mugging ring. Meanwhile, Dutch follows his instincts on a serial killer case and Danny is bitten by an HIV-infected perpetrator.