When Frank Bertinelli is arrested, Oliver knows it’s only a matter of time before his daughter, Helena, AKA The Huntress, returns to town. To make matters worse, Laurel is picked to try Frank’s case, putting her right in the path of Helena. Oliver tells Sara he will handle his ex-girlfriend, but when Helena takes hostages at the courthouse, including Laurel, the Canary will stop at nothing to save her sister. When The Huntress and Canary meet, an epic battle begins. Meanwhile, Roy realizes he needs to keep Thea safe, but doesn’t like the way he is forced to go about it.

Castle and Beckett investigate the murder of a Wall Street trader, but the case takes a shocking turn when the they discover the victim was an undercover informant for the U.S. Attorney’s office. To complicate matters further, the U.S. attorney involved is Elizabeth Weston, Captain Gates’ estranged sister.

With only a half-hour to go, both Barney and Robin have panic attacks about their upcoming nuptials. Meanwhile, Marshall and Lily rewrite their old wedding vows.

Gabriel and Riley must determine who is responsible for framing Gabriel when he is suspected of murder; Tetazoo leads a manhunt for Riley and Gabriel.

Jeannie gets help from an old friend on a government contract, but it creates an issue with Marty about their future with Dollahyde. Meanwhile, Clyde causes friction to develop between Monica and a client; and Doug makes a play for Caitlin.

Alicia enlists Cary as her lawyer when Nelson Dubeck approaches her to participate in a deposition regarding his investigation into election rigging. Meanwhile, Will continues the difficult defense of Jeffrey Grant as he faces off against a new prosecutor who proves to be a formidable adversary.

While Kiera investigates the two Alecs in one timeline, the mayor is kidnapped by a reunited Liber8. Carlos struggles with the reality shattering truth of Kiera’s predicament.

While Kiera investigates the two Alecs in one timeline, the mayor is kidnapped by a reunited Liber8. Carlos struggles with the reality shattering truth of Kiera’s predicament.

Grace is kidnapped by the killer who has been hunting former CBI members, but when the prime suspect appears to have an airtight alibi, Jane must rely on all his skills to locate her before time runs out.

Harvey faces an old rival from law school; Jessica tries to stay out of Louis and Scottie’s feud.