The series final season begins with Vic dealing with family threats and being challenged by Shane. Meanwhile, a federal agent investigates a rash of violence in Farmington.
Songs: Social Distortion -- Reach for the Sky
Vic finds himself a valuable commodity to both sides of the Mexican-Armenian gang war which is heating up. Meanwhile, Farmington is hit with black-on-white violence; Vic is confronted by Corrine and Cassidy; and an Anglo rock singer is killed when hit by a cement block dropped by someone in her predominately Hispanic apartment building.
Vic sets up a meeting with the Mexican's following the fire at the Armenian safe house, believing the Mexican's have Pezuela's blackmail box. Meanwhile, an angry Cassidy questions Danny about her father; and Dutch questions a teen who shot at an intruder, who happens to be the youth's classmate.
The Strike Team must free the kidnapped daughter of a drug kingpin without tipping off the fact that Agent Olivia Murray is following him. Meanwhile, serial killer Kleavon Gardner, who will be defending himself at his trial, hits a nerve when he disposes Claudette. Also, Dutch continues to try and prove that teenager Lloyd, is a possible serial killer. Then, Danny puts the pressure on Vic to sign away his rights to their child, and Shane tries to turn Ronnie against Vic.
Vic sets plans in motion to end the gang threat as his relationship with Cassidy deteriorates. Dutch and Billings investigate a possible somnambulist murderer.
Vic's mission to take down Pezuela is interrupted due to his review board meeting being pushed ahead---followed by a bigger snag when the FBI take over the Robert Martin murder case. Meanwhile, Vic is determined to take part in his infant son's life. Shane works in private business as he probes the murder of a prostitute. Plus, Dutch and Billings are disturbed by their findings when they investigate the break-in at Claudette's house.
Shane must think and react quick when an assailant is caught who made an attempt on the lives of Ronnie and Vic. Meanwhile, Vic makes a business proposition to Agent Murray, just one week before Vic is scheduled to turn his badge in. He also has some unfinished dirty work to handle for Pezuela, involving a priest whose church is in a location Pezuela feels is inconvenient.
Vic is nearing his finding of Shane, Mara and their sickly child. Claudette has made a decision to dismantle the Strike Team. Pezuela offers assistance to Aceveda towards his mayoral campaign. Meanwhile, Rita Denton comes on to Dutch, and a registered sex offender moves into the neighborhood has made Billings' ex-wife and daughter fearful.
Shane is in LA holed up with Mara and Jackson, causing Corinne to cooperate with Dutch and Claudette, who's been leading the fight of LAPD to bring down Vic. Meanwhile, Aceveda, Pezuela, Beltran and ICE have been played against each other by Vic. But Ronnie believes its time to give up and head off to Mexico, and suggests that Vic should come along.
Vic and Shane have decided to use Corinne as a go between---and also has agreed to cooperate with Claudette and Dutch at the same time. Meanwhile, Vic and Aceveda come to an understanding and is seeking another with Olivia. Ronnie is kept "out of the barn" when Claudette assigns him to work with Julian on the murder of a high school football star, which also keeps Ronnie from intercepting the letter which details the Strike Forces "sins" that Shane sent to Claudette.
Olivia and the Strike Team join together in an attempt to bring down a Mexican kingpin and his shipment. Meanwhile, Billing's mess is cleaned up by Dutch, and Claudette investigates when a woman is found dead who was associated with the Strike Team.
The series finale finds the team searching for a missing woman and awaiting a huge drug shipment.