In the Season 3 finale, the agents struggle in the aftermath of the gang war; and Briggs tracks down a loose end in order to bring Ari Adamian to justice.

As the feud between the Sarkissians and a local gang escalates to uncharted heights, Briggs' motives are finally revealed, and Mike's hunt for the Sarin gas holds hundreds of lives in the balance.

Johnny goes undercover to prevent a gang war, Jakes and Charlie aim to take over Germaine's business, and Mike begins piecing together Briggs' master plan.

As Ari rises up through the ranks of the Armenian mafia, Briggs must dodge new suspicions from his housemates. Back in Florida, Charlie and Jakes move one step closer to taking down Germaine.

While Mike questions Briggs' true motivations in the Sarkissian Case, Charlie devises a new angle to catch Germaine.

As Charlie and Jakes close in on Germaine, Mike's drug addiction reaches a breaking point when he and Gusti are caught in a dangerous situation.

Charlie tries to pull Amber from Florida; Paige sets up a bust to pull the plug on the Sarkissian organization.

Mike develops a plan to learn about the contents of Gusti's trunk; and Briggs helps Paige go undercover with the Armenian Mafia's shipping company.

With the house reeling from the death of an agent, Briggs and Johnny make a dangerous deal to free Lucia from Carlito Solano, and Mike's visions lead him to a small-time crook with a dangerous secret.

When Ari Adamian has no recollection of his actions, Briggs helps the Armenian gangster piece together the disturbing details of his lost night.

While Mike's visions and addiction to pain medications start affecting his ability to function in the field, Briggs coaxes a former FBI agent out of retirement to help take down Ari.

Briggs tries to keep control of Ari Adamian while Charlie struggles with the decision to terminate her pregnancy.

The Season 3 premiere finds the agents working to close out their ongoing cases and repair broken relationships. Briggs, meanwhile, is coerced into taking a high-risk undercover operation within the Armenian Mafia.