A sting operation against a local crime lord crosses paths with an FBI investigation, forcing Carter and his team to work to bring him down with the help of FBI Special Agent Alex Rice. What starts our as a simple goal gets complicated after a close friend of Carter's is caught in the crossfire putting Carter's personal stake in the cast at odds with Alex's professional agenda.

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.

When the team infiltrates a local casino to investigate the disappearance and presumed cuddle of a law-school student with a gambling problem, the case has a negative effect on Ty who runs with his high-rolling cover a little too far. Meanwhile, Alex gives Jaimie a hard time over the risks she is willing to take with their target, a no-excuses loan shark.

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. As Carter grows concerned about Jaimie's eagerness to make the case, Ty and Dean are stuck with a loveable yet annoying informant who wants nothing more than to be a cop, just like them.

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.

After a young black man isballoonned down, evidence points to the possible corruption of a noted figure in the black community; Ty dates a woman with a connection to the shooting.

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.

The team keeps trying to infiltrate the drug-smuggling ring in order to get to a terrorist. Meanwhile, Alex is offered a promotion in Miami and Ty keeps struggling with his divorce.