Insurance agent John Allen was strangled and thrown off a roof into a tree. masked men hold and the coroner at gun-point to steal the corpse on the way to the morgue, then dump it after butchering the inside, probably retrieving drugs. The widow refused to consider infidelity and pointed at former colleague Max Haverstock but it turns out both were fired eight months before and only Max got another legal job. Meanwhile only the mayor and the chief stand between Castle and jealous Becket severing his privileged ties with the NYPD after this 'last case'

At full moon, couples therapist Ashley Coway (32) is found at home by her husband, who ignores who the second portion Chinese was for, shot and marked in bad English 'psycho, you're time is up, rapist'. In the park near his home, retired math teacher Frank Anderson is also found shot. Ashley's visitor was friend-lawyer Brandy Rossi, asked to explain how one gets a restraining order. She and husband have an alibi, so Castle looks into her patients and a rumor of marital trouble. His hurry because of a bet against Javier and Ryan which duo solves its crime first

During fashion week, a couple playfully stripping in a public fountain finds the beaten-up corpse there of designer Teddy Farrow's rising model Jenna McBoyd, fatally stabbed with an obelisk-shaped glass object. She was on diet-amphetamines, hoping to be chosen as the collection's campaign-face. Devoted husband Travis, who moved for her from Ohio, is shocked the NYPD still didn't follow up on their complaints about a stalker who never actually threatened her, identified as croupier Will James, who has an alibi. Model Sierra Goodwin now gets the campaign, and secretly

When an Arctic explorer is killed during a polar expedition, the mysterious circumstances of his death take Castle and Beckett from the penthouses of Park Avenue to the halls of the CIA. But Castle's delight at the case's many twists and turns soon turns to frustration as he realizes that their elusive killer might just be fooling them all.

Illegal Czech immigrant Eliska Sokel's corpse is found hidden in a sewer, two days after her death. Her also-illegal ex, Teodor Hajek, explains she left him after their son died from a congenital disease. She had worked on the concierge staff of a luxury residence but was fired after Dr. Cameron Talbot's wife questioned the appropriateness of her treating their son Zane to a lollipop. Castle wonders how Beckett will take his dedication of a book starring her alter-ego, and his agent Haas's offer of a contract to write 3 British spy novels.

As Halloween approaches, Castle and Beckett are called to a graveyard where the body of a young man sporting vampire fangs has been discovered with a wooden stake driven through his heart. Their investigation takes them deep into the heart of New York's underground vampire fetish community, where they learn that the motive for the victim's murder may be hiding within the pages of the graphic novel he was writing before his death.

Castle's daughter's favorite ban The Blue Pills's singer Haley Blue, who was about to break it up for a solo career, is found in an alley with a broken neck, murder staged as suicide. Stalking fan Franco Marquez, against whom she got a restraining order, says he overheard ex-con guitarist Zack Metzger threaten her. Both Castles add lyrics analysis to confusing facts about a possible band reunion and drug (rehab) history involving her sister Skye, producers couple Ian and Bree Busch and ex-producer John McGinnis.

Bike messenger Caleb Shimansky is killed by a masked man in a stolen black sedan. Caleb carried only one package, for Sally Niedermeyer, whose name the courier firm had miswritten as terrorist Shakir Nidal Mattar's. It was a message from her nephew Brian Thompson, from jail, where he's murdered hours later. It proved he, convicted due to present captain Roy Montgomery, confessed innocently to have his son's medical bills paid. Castle's connections help investigating the original murder of Olivia, which soon points to the extremely wealthy, politically influential...

Highly respected, A.D.A. Jack Buckley, a tough crime-fighter, was murdered. His brother in law, businessman Paul Cho, was blackmailed mysteriously with his use of call girls from 'Danton'. Team Castle discovers it's all about the discrete cyber-pimp-business, which also employs Buckley's legal protégée Scarlett Price. While working out who succeeded jailed founder Dan Tonelli, 'cool dad' Castle worries which secret Alexis shares only with Beckett.

Sam Parker's corpse is found in a garbage chute. However he's identified not only by his wife Helen, but also by a fiancée, who only knew him as 'bachelor' Jake Holland. Also under this second identity he got his present job, at a company which overtook by mans of innovation his first employer's. His brother-in-law found out and was due a big loan. Meanwhile Becket accepts to supervise Alexis's police internship.

When an art dealer is gunned down in his gallery, Castle & Beckett discover that a bullet is inexplicably missing from the crime scene. The mystery is deepened by an amnesiac who witnessed the crime but can't remember what he saw or even who he is.

When Castle and Beckett are called to a wedding to investigate the death of a bridesmaid, Castle is stunned to discover that the soon-to-be bride is his old flame, Kyra, "the one that got away." Complications ensue as Kyra, caught off-guard by Castle's reappearance in her life, wonders if she's marrying the right guy. With the nuptials forestalled and the entire wedding party under suspicion, Beckett questions Castle's ability to be objective about the case. But when it looks to Beckett like Castle and Kyra might rekindle their romance, her judgment may be compromised

While investigating the death of an Irish mobster, Beckett and Castle uncover a local turf war that may be connected to both a late-night infomercial guru and an international drug smuggling operation. But the case turns agonizingly personal when evidence emerges that the killer they're chasing may have had a hand in Beckett's mother's murder.

Mysteries abound when a family returns from vacation to discover a dead man in their daughter's bed. Thinking they're investigating the murder of a squatter, Castle and Beckett soon find themselves unraveling a multi-million dollar heist. Meanwhile, Castle tries to keep Beckett from finding out that they've been romantically linked when he's featured as one of New York's 10 most eligible bachelors.

Retired baseball star Cano Vega is murdered on a Spanish Harlem community field he ands some team mates sponsor, skull smashed with a bat. He had $200,000 loan shark debts and his wife believed him adulterous. Yet she and dodgy agent Bobby Fox point at Alfredo Quintana, editor of a Cuban diaspora magazine which called him a traitor after a visit to Castro's Cuba, which he was a refugee from. he was beaten by a team mate, but there's more to the Cuban connection.

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.

In a two-part storyline, Federal Agent Jordan Shaw, an insightful and accomplished Federal investigator, teams up with Castle & Beckett to hunt down a 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?

Hours after filthy rich comedian and TV show star Bobby Mann asked Castle, one of his guests, for help claiming to fear for his life, he dies from cardiac arrest. Castle insists on an autopsy, which shows a crafty poisoning requiring knowledge of Bobby's medication. The night before, he had visited two of his ex wives, Cindy and Barbara, who have apartments in the same building, and later, he saw his future successor as show host. He was also blackmailed with pictures of him and an apprentice, but by whom? Castle enjoys a hot affair with actress Ellie Monroe

Multiple ex-con break in expert Paul Finch is found is his car electrocution-tortured, possibly to accidental death. His widow believes he took on last job after years in the clear, probably the recent Manhattan tunnel bank robbery. The team is delighted to be joined by Javier Esposito's mate from the 54th precinct, handsome hot-shot Tom Demming, from Castle's point of view too much to Becket's taste. The robbery victims include Fred Cana, collector for untouchable crime king Victor Racine, believed to have killed Javier's previous partner Isaac 'Ike' Thornton

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.

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.

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.