The Underwoods tackle two threats that could bring their plans to ruin. Francis grooms his replacement as Whip. Claire goes on the offensive.

Gabriel and the team go to Texas to help contain a deadly, quickly spreading virus and identify patient zero.

Marty and Jeannie launch a duplicitous plan to remove Lukas from DollaHyde; Dre and Marty bond on a personal level; Clyde woos a big client; Doug deals with his feelings about having a baby with Sarah.

Hart and Cohle hunt for their newly identified suspect, Reggie Ledoux, a meth cooker who shared a cell with Dora Lange’s husband and recently skipped parole. As Hart’s personal life collapses around him, Cohle immerses himself in an old criminal identity from his narco days, contacting an East-Texas biker gang known to deal with their primary suspect. Cohle’s undercover work takes him to a dangerous edge where the law has no place, and both men must confront the cost of living a false life.

Holmes’ latest investigation takes him inside a professional dance company when an up-and-coming ballerina is murdered. Meanwhile, Watson embarks on a solo enquiry to find a homeless veteran when his friend alleges he was abducted.

Claire and Phil spy on Luke and Manny; Jay misinterprets Gloria’s anger over a dream she thinks he had for another offense he committed; Mitch tries to keep a secret from Cam; Haley tries to keep her photography exhibit from her family.

Reverend Deveaux interferes with the Hecks’ plan to use their coupon for an all-you-can-eat buffet after church.

As Laurel continues to unravel, Oliver and Lance try to convince Sara to stay in Starling City and finally reunite with Laurel and Dinah. However, Sara’s fellow League of Assassins member, Nyssa, comes to bring Sara back to the fold, but when Sara refuses, Nyssa kidnaps Dinah. Realizing she’s putting her family in danger by staying in town, Sara considers re-joining the league.

Hot on the trail of the Clairvoyant, Coulson and his team board a mystery train that seems to be headed for certain death.

When the assistant to Modern Fashion Magazine’s dictatorial editor Matilda King is found murdered, Castle and Beckett are thrust into the glitzy, ruthless world of high fashion in their search for the killer. Meanwhile Beckett’s history in the modelling world gets her access to a very special wedding surprise.