Castle and Beckett investigate the murder of a missing plastic surgeon who is found dead in the front seat of his car after a week of being parked curbside. As they delve into the twisted world of surgery obsessed patients and secret operations, Castle experiences a fatherly rite of passage as Alexis attends her first prom. And while looking into Beckett’s past, he unearths information that could end his relationship with her forever.
When a two-year-old girl is discovered missing from her home, Beckett is called in to assist with the investigation only to discover that the FBI agent in charge is, in fact, her ex-boyfriend. The two of them try to put aside their unresolved feelings as they race to find the girl, but when Castle inserts himself into the investigation, competition quickly heats up for Beckett’s attention.
Castle and Beckett investigate the murder of a woman found drowned in a bathtub of motor oil at a transient hotel. But when they uncover a dark secret about the woman’s past, they must unravel a 20-year-old mystery with the help of a true crime journalist who may have been stalking the victim. Meanwhile, Beckett puts her poker face to the test as she squares off against Castle, with her money and pride at stake.
When a wealthy socialite is found brutally murdered and stuffed inside a wall safe Castle and Beckett must determine who is orchestrating these violent robberies before they strike again. To catch this deadly thief Beckett must go way out of her comfort zone to enter Castle’s glamorous, paparazzi filled world as his date to a charity ball. Meanwhile, Castle seeks the counsel of a dangerous ex-jewel thief who had once threatened to kill him.
When an immigrant is found tortured and murdered in a ritualistic killing, Beckett navigates the uncharted territory of the mysterious Vodun religion with Castle leading the way. Having researched similar deaths for one of his books, Castle’s knowledge and sources prove valuable, but only their apt teamwork can unravel the murderer’s motives.
A frozen woman found tangled in steel bars at a construction site leads Castle and Beckett to a years-old mystery and a long abandoned case. As the two uncover startling revelations about the victim’s past, the investigation forces Beckett to face some difficult memories of her own, which provides Castle insight into his muse and additional material for his novel.
When a body of a New York City Councilman running for re-election is found wrapped in a rug on the sidewalk, Castle and Beckett’s investigation takes them deep into the cutthroat world of New York City politics. As the new partners dig beneath the surface of the case, they discover a world of high-priced escorts, arrogant tycoons, and corrupt private investigators along with the true cost of betrayal.
A once wealthy teenage boy whose family has fallen on hard times is found dead in a rowboat floating along the lake in Central Park. As Castle and Beckett try to piece together the events leading up to his death, his friends do everything in their power to thwart the investigation. As they unravel the truth from the lies, a story of betrayal and obsession emerges. Meanwhile, Castle debates whether he can leave Martha home alone while he chaperones Alexis’ class trip to Washington, DC. Martha might be an aspiring “Life Coach,” but that doesn’t mean she’s trustworthy.
Castle and Beckett investigate the murder of a nanny in her 20s who is found murdered inside a dryer in the laundry room of an updscale apartment building in Manhattan. Castle begins his research into Beckett’s personality and behavior to develop the character for his new book.
Mystery novelist Richard Castle is questioned by police after two murders bear a strong resemblance to the murders in his novels. Later, Castle finds himself helping to investigate the crime displaying a unique insight into the true motivation of the killer.