Plot summary
Boyd sends Colt and his man Jimmy Tolan to attack the St. Cyrs, but the latter is bitten by snakes left out for them. When he does not die, Boyd realizes Cassie has been milking Billy's snakes of their venom and reveals this before the congregation. Humiliated, Billy takes his offer of an unsafe snake, being bitten and dying. Lindsey explains to Raylan that she and Randall used to run criminal scams together, which he went to jail for while she reformed. Raylan talks to Thompson's widow, but she is kidnapped by a Detroit man while he is distracted by a corrupt FBI agent.
Raylan forces her location out of the agent, who commits suicide after giving it up. The marshals rescue her before she can be tortured for Thompson's location, and she explains that Thompson told her he was going to die after seeing Theo Tonin kill a federal witness. Raylan returns to his apartment to find his money stolen and Lindsey gone.
Credits
Adapted from Wikipedia contributors, Justified season 4. HTML formatting and reference markers removed.