While working to undermine the murder charges against Ava, Boyd reaches out for new partners. Art steps up his investigation of the Tonin crime family.

Raylan has one last shot at taking down Art's would-be assassin, while cartel killers have Boyd's back against the wall.

Following an attack on the Marshal's Service to avenge Danny's death, Boyd lands in the hot seat with Duffy and Picker. As Raylan struggles with being pushed aside at work, a powerful inmate's murder presents both danger and opportunity for Ava.

Raylan puts pressure on every criminal in town as a ploy to arrest Darryl Crowe Jr., while Boyd and Duffy enlist an unlikely ally to fight off cartel killers.

As Raylan investigates the Crowe crime family's role in the disappearance of a corrupt Florida Coast Guard officer, Boyd revives a failed drug deal to help keep Ava's murder case from going to trial.

As Art's frustration with Raylan boils over, the Crowe family battles both the U.S. Marshals and the Crowders to stay in Harlan. Boyd enlists unlikely allies to ensure Ava's safety in prison and regain control of the local drug trade.

Raylan partners with a maverick DEA agent whose bad behavior feels uncomfortably familiar, while Boyd makes a hard choice to protect Ava.

Raylan and Boyd collide on the hunt for Dewey Crowe, while bad blood simmering in the Crowe family finally boils over.

Boyd's plan to keep Ava from being tried threatens to unravel while an unexpected reunion with Loretta McCready pits Raylan against two hit men working for a ruthless Memphis drug lord.

A computer hacker leads Raylan on a wild goose chase. Ava looks to secure her safety in prison, while Boyd and Johnny square off over a heroin deal in Mexico.

Overseeing an asset forfeiture leads Raylan to discover a crime boss' hidden treasure, while Boyd continues his efforts to try to clear Ava's name. Dewey's cousins arrive from Florida to take over Audrey's.

The search for a missing government informant pits Raylan against both the Crowder and Crowe clans while an investigation into in the death of Nicky Augustine threatens to implicate Raylan. A standoff with Johnny reveals a powerful rival to Boyd's drug business.

When Kendal takes off with his uncle Jack, Raylan's search exposes the truth about their relationship to Wendy. Meanwhile, Boyd and the Crowes move heroin across the Mexican border, and Ava sets up a drug smuggling operation in prison.