Castle and Beckett look into the murder of a young mathematician gunned down with a 200-year-old bullet, sparking some wild theories by Castle about a time-traveling killer. When their investigation uncovers a tricked-out DeLorean and a suspect in Victorian clothing, is it possible Castle’s crazy idea has some validity?
When the gang teases Robin about not being a real New Yorker, she sets out to prove them wrong by racing to catch a glimpse of Woody Allen.
When Pierce’s mother dies, the group helps to comfort him. After putting Jeff in the hospital, by one of her class pranks going awry, Professor Bauer takes a leave of absence and Professor Duncan attempts to take over her Anthropology class.
In this case, timing is everything as a series of anomalous events lead the Fringe Division to investigate deadly incidents with unimaginable coincidences. As the freaky crimes continue to occur, the team is in a race against time to protect potential victims. Meanwhile, Secretary Bishop shares his strategic plan with Colonel Broyles as Olivia grapples with a heart-stopping vision.
When an earthquake hits, Claire gets stuck in the bathroom with the plumber, Manny experiences an existential crisis while out with Jay, and Mitchell and Cameron use it as an excuse to get out of attending a party.
Having lost both his wife and company, Daniel approaches the Ha’la’tha with a deal to capitalise on virtual avatars as a means of defeating grief.
An Army reservist is accused of murdering his wife. Childs turns to dirty tricks in hopes of marring Peter’s campaign.
With the latest case of a murdered bail bondsman, Beckett discovers that Castle’s wild imagination and theories may be on the mark. Beckett’s ex-partner makes a surprise arrival and Castle is forced to watch the two reminisce and engage in a little romance.
Cal tries to thwart a bank robbery from the inside by forcing his way into the gang, and tries to talk one of the robbers out of seeking revenge for the bank erroneously foreclosing on his home.
When Jane’s shady brother-in-law (Kevin Rankin) comes to town and becomes a suspect in a murder investigation, Jane is forced to help him.