With their lives in danger in New Vegas, Monroe and Connor face a difficult decision in order to survive. Back in Willoughby, Miles questions whether he can trust Neville and Jason to help take down the Patriots. Meanwhile, Aaron and Priscilla find themselves at odds over the nano code.
When a guilt-ridden young woman confesses to the murder of a struggling actor — knowing details only the killer could know — Beckett and Castle seem to have an open-and-shut case, until they uncover proof that their suspect couldn’t possibly be the killer. When a second person confesses, equally convinced they committed the murder, the team realizes the case is far more mysterious than they thought.
When Barney suffers from the world’s worst hangover the morning of his wedding, the gang tries to figure out the far-fetched ingredients to concoct the Stinson Hangover Fixer Elixir.
While in Bolivia with Riley to protect a presidential candidate from assassination, Gabriel is shocked to learn his best friend is the suspect.
Marty and Jeannie come up with different approaches on how to deal with Lukas’ attempts to sabotage DollaHyde. Meanwhile, the relationship between Roscoe and Lex becomes a problem for Marty.
In 2002, Cohle and Hart begin to fall back to familiar and violent obsessions. Hart exacts savage vengeance on a pair of teenage boys, and Cohle becomes convinced they left something undone in 1995. Working on his own, Cohle traces a sinister connection between missing children along the coast and evangelist Billy Lee Tuttle’s Wellsprings Program. Hart is reintroduced to a former prostitute he met during the Lange investigation. In 2012, Papania and Gilbough question Maggie, now divorced from Marty, about Cohle and Hart during 2002, the year their relationship fractured and Cohle quit the force following a suspension.
The murder of a high school mean girl draws Castle back to one of his many alma maters, where he is giddy to learn that the evidence points to a surprising perpetrator – a teenage telekinetic, throwing he and Beckett into a real-life “Carrie.”
Gabriel and Cybercom investigate when artificial intelligence scientists are infected and killed by microscopic robots.
At the DollaHyde sneaker launch party, Marty is tested by Dre and considers a double cross. Meanwhile, Jeannie learns that Lukas is suspicious of their plan; and Doug makes a fatal mistake.
A violent denouement in the forest clears the Dora Lange case and turns Cohle and Hart into local heroes. Each man settles into a healthier rhythm of living as Hart returns to his family, and Cohle starts a relationship while gaining a reputation as a closer in interrogations. As time passes and his daughters grow older, Hart faces new tensions and temptations, and Cohle learns from a double-murder suspect that there could be much more to an old case than he’d once thought. In 2012, Gilbough and Papania put their cards on the table, presenting new intelligence that threatens Cohle and causes Hart to reassess everything he thought he knew about his former partner.