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

The Briggs-Bello alliance is tested due to an ultimatum. Mike must push his limits for the good of the case.

Johnny goes undercover to stop a gang war; Jakes and Charlie set out to take over Germaine's business; and Mike begins to piece together Briggs' plan.

Jangles takes a Graceland member hostage. The housemates unite to save one of their own.

The power dynamics are disrupted when Graceland has a surprise visitor. Mike is put in a precarious position. Tuturro risks his cover with Carlito.

The Solano case is in shambles. Paige is deep undercover within a sex trafficking ring. Mike and Briggs need to take extreme measures.

As the arrests of Sid and the Solanos near, even the best laid plans begin to crumble.

Bello's last strike initiates a war that Graceland must stop. Charlie meets an unusual ally. Briggs faces the past.

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

The feud between the Sarkissians and a local gang heats up; Briggs' motives are revealed; and Mike hunts for the sarin gas.

Briggs learns that someone at Graceland has proof of his past crimes. the team executes a bank heist.

Plans take a turn for the worse when Charlie attempts to pull Amber from Florida; and in an effort to aid Briggs, Paige sets up a bust to pull the plug on the Sarkissian organization. However, things are not always as they seem.

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.

When a cartel puts a hit on Mike, he returns to Graceland, finding the place changed.

Even as the agents bait their final hooks against the Solano Cartel, it dawns that Sid may still have a few tricks of his own.

Ari rises through the ranks of the Armenian mob; Briggs dodges new suspicions from his housemates; and Charlie and Jakes are one step closer to taking down Germaine.

Mike convinces Bello to steal from a drug cartel. Briggs helps Charlie cover up bad decisions.

Charlie decides to tell the house about her bust. Briggs must come clean. Mike believes his investigation is ending.

Charlie learns a secret about Briggs and works with a Federale. Mike finds out that Juan is missing.

Briggs and Mike search for the truth about Juan's disappearance. Briggs makes a decision about his future.

The team tries to find the bus line responsible for smuggling contraband into the country. Tuturro sells an antique gun to the son of a cartel leader.

When Mike comes face-to-face with his greatest enemy, he pledges to do whatever it takes to take the man down.

As the agents of Graceland strive to close out their ongoing cases and mend broken relationships, Briggs finds himself coerced into a high-risk undercover operation within the Armenian Mafia.

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.

Briggs and Mike tilt rival gangs against each other. Mike learns that undercover life has moral complications.