In "Justified" Season 4, U.S. Marshal Raylan Givens, a man who wants to do right but often finds himself in trouble, investigates a mysterious bag found in his estranged father Arlo's house. This leads him to uncover the identity of Drew Thompson, a man Arlo is hiding. Meanwhile, Boyd Crowder, a former friend of Raylan's now running a drug empire, faces threats to his business from a charismatic preacher and a dangerous new player in the criminal underworld.

The season's central conflict revolves around Raylan and Boyd both hunting for Drew Thompson, who is revealed to be Shelby Parlow, a seemingly ordinary constable. Their pursuit is complicated by a dangerous Detroit mob, corrupt officials, and betrayals within their own circles. Key turning points include Arlo's shocking murder in prison and the reveal that Shelby Parlow is Drew Thompson.

The season concludes with Raylan securing Drew Thompson for witness protection, but not before Colt is killed in a violent confrontation. Boyd, devastated by recent events and facing the wrath of a powerful crime boss, is left to rebuild his criminal enterprise in Harlan.

Season 4 of Justified covers episodes 1-13. Here's everything that happened:

Season 4, Episode 1: Hole in the Wall - Raylan apprehends a fugitive for extra cash due to his impending fatherhood. Teens breaking into Arlo's house discover a mysterious bag, leading Raylan to investigate his father's past. Boyd's drug business is threatened by a new preacher, leading to Colt killing a dealer. The episode concludes with Raylan questioning Arlo about the bag, while Boyd hides money from Ava.

Season 4, Episode 2: Where's Waldo? - Raylan investigates Waldo Truth, whose ID was in the bag from Arlo's wall, and learns Waldo died in 1983. Boyd confronts a snake-handling preacher, Billy, who is impacting his business. Wynn Duffy reappears and kills a Dixie Mafia dealer. The episode concludes with Raylan meeting Lindsey's estranged husband.

Season 4, Episode 3: Truth and Consequences - Raylan hunts Drew Thompson, leading to a corrupt FBI agent committing suicide. Boyd's attempt to shut down the snake-handling church backfires when Jimmy is bitten. Lindsey and Randall steal Raylan's money and flee. Billy St. Cyr dies after being bitten by a snake he believes will not harm him.

Season 4, Episode 4: The Bird Has Flown - Raylan hunts for Lindsey and Randall, who stole his money to finance a cockfighting venture. Ava decides to send Ellen May away, but after Ellen May reveals too much, Colt is ordered to kill her; however, Ellen May escapes. Lindsey shoots Raylan and Randall with beanbag rounds and flees with the van of chickens.

Season 4, Episode 5: Kin - Arlo offers Drew Thompson's location for release, spurring Raylan and Boyd to find him first. Boyd, through Duffy, seeks Thompson for half the heroin trade. Raylan and Boyd are captured by hill people, but Raylan claims kinship to escape. Josiah Cairn removes his foot to ditch his ankle monitor.

Season 4, Episode 6: Foot Chase - Raylan and Shelby team up to find Josiah after his foot is discovered. They learn Arlo told Boyd's lawyer that Josiah is Drew Thompson. Boyd proposes to Ava, wanting a better future for their family. Shelby arrests Boyd, while Colt's drug use escalates. The episode concludes with Raylan learning that Hunter may know where Drew Thompson is.

Season 4, Episode 7: Money Trap - Raylan hunts Jody Adair, who killed a bail bondsman after escaping custody. Boyd and Ava attend a swinger party seeking Drew Thompson, but Boyd is pressured by local officials to commit a crime. Raylan confronts Jody at a bar, resulting in Jody's death. Raylan visits Arlo in prison, offering a deal for information on Drew, but is rebuffed.

Season 4, Episode 8: Outlaw - Raylan questions Hunter Mosley about Drew Thompson, leading to Arlo's shocking murder in prison. Boyd, leveraging his connection with the Tonins, eliminates the Harlan elite. Raylan kills a hitman. The episode concludes with Raylan visiting Arlo's corpse, grappling with the complex emotions surrounding his father's death.

Season 4, Episode 9: The Hatchet Tour - Raylan transports Arlo's killer, Hunter, hoping to learn Drew Thompson's identity. Boyd discovers Ellen May is alive, sending Colt to silence Cassie, but Tim intervenes. The episode culminates in the reveal that Shelby Parlow is Drew Thompson.

Season 4, Episode 10: Get Drew - Raylan, Boyd, and the Detroit mob race to locate Drew Thompson. Shelby/Drew flees with Ellen May, seeking Limehouse's protection, but Limehouse recognizes Drew and decides to hold him for ransom. Johnny betrays Boyd, leading to Shelby's capture by the Marshals. Boyd and Ava are left to face the wrath of Theo Tonin.

Season 4, Episode 11: Decoy - The Marshals use a decoy convoy to extract Drew Thompson, but Boyd anticipates their moves. Constable Bob kills a Detroit hitman after a brutal beating. Ava learns of Johnny's betrayal. Drew escapes Harlan on a coal train.

Season 4, Episode 12: Peace of Mind - Drew Thompson demands Ellen May's safety for his WITSEC deal. Boyd seeks to silence Ellen May, while Raylan races to find her. Colt is killed by Tim during a standoff at the church. The episode concludes with Picker, working for Augustine, delivering a rocking chair to Winona.

Season 4, Episode 13: Ghosts - Raylan saves Winona from Nicky Augustine's men in a shootout. To protect Winona, Raylan manipulates events leading to Nicky's assassination. Ava is arrested after being set up by Lee Paxton. Boyd, devastated, is offered Wynn Duffy's heroin distribution in Harlan. The episode concludes with Raylan at Arlo's house.