Castle and Beckett’s long-awaited wedding is almost here, but when a shocking surprise threatens to ruin the big day, they are sent on a wild mission filled with masked men, angry bikers and a charming ne’er-do-well from Beckett’s past (guest star Eddie McClintock, “Warehouse 13”).
A secret investigation conducted by Beckett related to her mother’s murder goes awry when a man she has been surveilling is killed. When evidence links Beckett to the victim, she and Castle become the targets of a manhunt that puts both of them in grave danger.
When an up-and-coming professional skateboarder is gunned down by a mysterious motorcyclist, Castle and Beckett are thrust into the world of extreme sports, where the death defying stunts aren’t the only thing that’s dangerous.
When construction workers find the body of an infamous New York mobster who disappeared in the seventies, Beckett and Castle try to solve this three decade-old Mafia hit. Unfortunately, their only witness is a man who thinks it’s still the 1970’s, so to uncover what he knows, they must play into his delusion, and party like it’s the last days of disco.
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 (guest star Salli Richardson-Whitfield, “Eureka”), Captain Gates’ estranged sister.
When a Japanese ballet dancer is mysteriously murdered, Castle and Beckett’s investigation into her secret life uncovers evidence that she was killed by a ninja, and now that ninja is coming after them.
Beckett is recruited to assist on a Narcotics investigation, but a routine mission turns deadly when an undercover operation goes array. To survive, Beckett must engage in a battle of wits against some of the most dangerous men in the New York underworld – including a powerful enemy from her past.
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.
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.”
When the assistant to Modern Fashion Magazine’s dictatorial editor Matilda King (guest star Franes fisher) 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.