Nothing is as it seems when Castle and Beckett investigate what appears to be the assassination of an intelligence operative. Meanwhile, Beckett's romance with Demming threatens her relationship with Castle, forcing them to confront their feelings for each other.
A robbery-homicide prompts Beckett to invite Demming to assist on a case, giving Castle a ringside seat to their budding romance. When it becomes clear that the two men have very different ideas about how to proceed, the investigation becomes an unspoken competition for Beckett's attention, one in which each man races to solve the case, as Beckett referees between her two admirers.
A beloved former major league baseball player is found dead after a goodwill trip to Cuba. The investigation, which includes running into Joe Torre (guest starring as himself), leads the detectives into New York’s Cuban community to solve the murder. Meanwhile, Alexis’ genealogy project forces Castle to consider the identity of his unknown father.
In the special two-part storyline, Dana Delany (“Desperate Housewives”) plays Federal Agent Jordan Shaw, an insightful and accomplished Federal investigator who teams up with Castle & Beckett to hunt down a cunning and elusive serial killer. This will reunite her and Nathan Fillion, who played Dr. Adam Mayfair, the younger husband of Katherine Mayfair (Delany) on “Desperate Housewives.”
In the second part of the story begun in “Tick, Tick, Tick…,” the serial killer remains at large and is taunting Castle, Beckett and Jordan Shaw (guest star Dana Delany) to catch him. Delany plays Federal Agent Jordan Shaw, an insightful and accomplished Federal Investigator who teams up with Castle and Beckett to hunt down this cunning and elusive serial killer.
The investigation into the shocking death of a museum curator, crushed by a falling gargoyle, takes a bizarre turn when Castle and Beckett learn that he isn’t the first member of a recent archeological expedition to die. It turns out there was a legend inscribed over the burial chamber the team unearthed warning that “all who gaze upon the face of the mummy are doomed.” Was the curator just the latest victim of “The Mummy’s Curse”? And if so, what does that mean for Castle, who snuck a peek at the mummy when no one was looking?
When Castle appears on a late-night talk show to promote his book, Heat Wave, legendary host Bobby Mann (guest star Tom Bergeron) leans in during a commercial break and whispers, “They want me dead.” When Mann dies later that night, seemingly of natural causes, Castle has to convince Beckett that there was foul play. During the investigation, Castle is seduced by a Hollywood hottie (guest star Kelly Carlson), who was the other guest on Bobby Mann’s show the night he died.
When a half-naked woman is found covered in caramel sauce and hanging by bondage cuffs in a public park, Castle and Beckett’s investigation takes them into New York’s underground world of sexual domination. Naturally the case serves as sexy fodder for their already charged relationship banter.
Investigating the murder of a thief, Castle and Beckett are surprised to learn that Esposito has a personal connection to the suspected killer. Another surprise is in line for Castle when Beckett hits it off with the handsome Robbery detective assigned to the case, Tom Demming (Michael Trucco in a recurring role rest of season). Now this romantic triangle must work together to solve the case.
A high profile chef is found frozen to death in the kitchen of a hot New York restaurant. Complications ensue when Castle and the restaurant owner, an old high school girlfriend of Beckett's, share an attraction. Meanwhile, Beckett's relationship with Det. Demming continues to grow.