Carter Shaw tries to find the leader of a gang who was responsible for torturing an FBI agent and leaving him to die. He also receives a new member to train, a beautiful patrol cop who happens to be an expert liar.
Ty goes undercover to search for a gun trafficker, but nearly blows his cover by breaking a crucial rule and seeing his wife on her birthday. Carter must come up with $100,000 to keep Ty's mission protected...and to save his life.
A ruthless drug dealer who also has a law background makes for a particularly hard target for the team to find, especially after the deadline for the sting's operation is moved up. Quick thinking and some legally questionable moves by Jamie will be necessary to make an arrest.
Ty and Dean work together to stop a tough Korean mob boss, but tension grows between the two undercover men as Ty approaches the case with caution and Dean adopts a rash, straight forward attack.
Carter's unit works to save a kidnapped woman, and Ty, Dean and Jamie go undercover to figure out where she is being held. However, when the FBI get involved in the case, Carter's grudge against the feds harms their progress in finding the woman.
The team goes deep behind the scenes to stop a crime ring which has a big diamond heist planned, with Dean and Jammie pretending to be a married couple to get closer to a major player. Meanwhile, Ty reconsiders his dangerous job after Melissa informs him she wants to start a family.
Ty's conscious is hit hard when the undercover crew goes in pursuit of a crooked, yet decorated cop, particularly when Ty's wife floors him with big news.
A turf war between two feuding gangs is the area where the covert team penetrates. One gang is a new group which plans on taking over the heroin business. In other developments, Ty's sister is in need of $7,000, which neither Ty and Melissa can afford.
Jamie goes undercover as her former self revisiting her dark past when she goes on a mission to crush a big-shot smuggler. In order for the case to succeed, she'll need to reconnect with an old acquaintance and ask a huge favor from her boyfriend.
Carter has become the prime suspect in the death of an undercover officer. Meanwhile, Melissa urges Ty to give up his dangerous uncover job and start a family with her. And Jaimie's boyfriend lands a new job in San Fransisco.
Carter and his team are forced to work with the FBI when a sting operation against a local crime lord crosses paths with an FBI investigation.
With Carter and his team now working with FBI Agent Alex Rice (guest star Tricia Helfer) as part of a special LAPD/FBI task force, the team goes after a drug ring with connections to a Mexican Drug Cartel. As Ty infiltrates the high-end world of a local dealer, Dean follows the drug ring to the most unlikely of suspects – A beautiful art gallery owner (Jordana Brewster – Chuck).
In order to get closer to their ultimate mark, the head of a notorious Mexican drug cartel, Carter has to pose as a porn king looking to expand his business into pharmaceuticals. But the case has Dean in an ever-complicated relationship with Maria (Jordana Brewster – Chuck), the attractive art gallery owner and daughter of a drug dealer.
The covert squad slips into the world of casinos to snoop into the disappearance of a gambling-addicted law student. It all gets dicey in this high-stakes realm when Ty goes too extreme in his role as a high roller. Meanwhile, Jaimie's risk-taking comes under scrutiny.
In order to locate an infamous anti-government militia leader, the team stages a jail break for his younger brother in the hope that he'll lead them to their target before he assassinates a prominent Federal Judge. Meanwhile, Ty’s extracurricular activities are starting to affect his job performance, just as Alex is preparing a report on the task force.
Jaimie poses as a junkie in order to infiltrate a dangerous crew of thieves who pose as DEA agents in order to steal from drug dealers.
Carter and his stealthy squad try to wipe out a home-invasion gang. While Ty assumes the identity of a thief, Alex and Carter pose as bait---but the mission is compromised when their target learns about the sting.
The team investigates a shooting involving a distiguished figure in the black community.
Carter, Dean and Jaimie go undercover to corner two drug-smuggling brothers who use a flower-import business as a cover for their activities. But things go awry when Homeland Security requests that the team keep the smuggling business open so they can trap a potential terrorist. Meanwhile, Dean asks Jaimie out on a proper date just; Ty has second thoughts about his impending divorce; and Carter for a major life change.