Castle and Beckett revisit a private eye's 1947 homicide after realizing it's connected to a present-day murder they're investigating.

When a famous dog trainer is killed, the investigation keeps coming back to charismatic reality TV star Kay Cappuccio (guest star Hilarie Burton, "White Collar"). Kay, a favorite of tabloids and gossip websites the world...

A body is found in a car within the mayor's motor pool, jeopardizing the mayor's administration and Castle's partnership with the police, which the mayor helped arrange.

When a lothario is killed, Castle and Beckett suspect that the victim's mysterious double life holds the key to his murder. Their investigation leads to a shocking twist that threatens to disrupt Ryan's wedding with Jenn...

When Castle and Beckett wake up in bed, handcuffed together, in a locked room with no memory of how they got there, they must piece together the mystery of where they are and why, all while trying to escape. But as the t...

A sniper on a killing spree is terrorizing New York City. With the clock ticking down to the next murder and nothing to go on except a killer with no apparent motive but to instill terror, this could prove the team's tou...

During the investigation of the murder of an Atlantic City casino owner at an abandoned warehouse, strong leads emerge for the team in both New York and Atlantic City. As Beckett and Capt. Gates work the New York leads t...

Castle and his mom become hostages in a bank robbery executed by thieves wearing hospital scrubs, and Beckett's rescue plans are hampered by a rigid hostage negotiator.

Castle and Beckett investigate the homicide of a popular ghost hunter who was killed while probing paranormal activity at a famous mansion.

An insurance investigator (Kristin Lehman) assists Castle and Beckett with a homicide case stemming from the theft of a costly sculpture, and a museum benefactor (Jessica Tuck) becomes one of the murder suspects

While investigating the mysterious shooting death of a young woman, Castle and Beckett face a cop's worst nightmare when they discover that the gun used in the killing is Det. Ryan's old service weapon - the one that was...

Gunshots, a fleeing van and a massive blood pool all point to murder, but when Castle & Beckett arrive at the crime scene, they discover that it lacks something - the victim! The investigation leads to the cutting-edge w...

When an ex-con is mysteriously slain in an alley, Castle and Beckett believe a vigilante is behind the murder. But efforts to identify their suspect are thwarted when they discover that he roams the city in a Superhero c...

In a riveting opening that picks up just moments after last season's climactic finale, Detective Beckett fights for her life as Castle , plagued by guilt over his role in the events, struggles to uncover who's behind her...

In the Season 3 finale, a hit man who has information about the murder of Beckett's mother escapes during a hearing. The manhunt leads Beckett to a law-enforcement figure tied to both the escape and her mom's death.

A beauty-pageant contestant is found strangled to death during rehearsals. The wealth of suspects includes the pageant's sponsor, the host and rival contestants.

Beckett goes rogue to pursue a suspect in her former partner's murder in Los Angeles. Castle tags along, and the two visit the set of his movie, "Heat Wave," where the cast proves helpful in breaking open the case.

Castle and Beckett investigate the death of a champion swimmer; authors Michael Connelly and Dennis Lehane give Castle advice.

When a reporter is found dead inside a pizza oven, Castle and Beckett try to determine why he was murdered.

A juror suddenly dies during a high-profile trial involving a murdered socialite.

When the head writer on a popular soap opera is killed with a fire axe, Castle is able to use his skills as an author to make a discovery about the killer.

Castle and Beckett must set aside their differences with Agent Fallon (Adrian Pasdar) while trying to prevent a city-wide catastrophe.

Castle and Beckett investigate the apparent robbery-homicide of a New York cab driver, only to discover that the victim was involved in a mysterious conspiracy with unimaginable consequences. As the stakes continue to ri...

An old friend of Castle's emerges as the prime suspect in his wife's murder.

The murder of a lottery winner leaves Castle and Beckett with a wealth of suspects; Martha must decide what to do with her inheritance.

The retired lead detective on Beckett's mother's homicide case is gunned down after telling her he has new information; Castle and Beckett's partnership grows stronger.

The owner of a historic magic shop is found dead in Houdini's water torture tank; a new romance comes to light.

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When a bar owner's body is found in the East River, the investigation takes Castle and Beckett through the forgotten tunnels and passageways of turn-of-the-century New York; Castle considers buying a bar.

When a prominent astrophysicist is found dead in her car, Castle is led to theorize her death was the result of an alien abduction.

While investigating a subway worker's murder in Central Park, Castle and Beckett unexpectedly uncover a boy's abduction.

When Beckett and Castle respond to an "officer down" call, they discover the victim is actually a male stripper dressed as a cop.

When a beautiful woman is found dead, the evidence indicates a notorious serial killer known as ``The Triple Killer.''

An unknown woman falls out of a casket along with the original deceased when pallbearers lose control of the casket at a funeral; the investigation takes Beckett and Castle into the world of amorous, bed-hopping physicia...

A young mathematician is shot with a 200-year-old bullet, inspiring wild theories by Castle about a time-traveling murderer.

When a coded document attracts Castle's attention, Beckett must steer the case back to the violent felons who populated their victim's world; when Beckett's ex-partner arrives, Castle must watch the relationship become r...

Beckett and Castle search for a psychic's killer while debating the existence of extrasensory abilities.

When Beckett and her team burst into an apartment on a murderer's trail, they see Castle standing over a dead woman's body holding a gun; Beckett arrests Castle as he asserts his innocence.

Castle and Beckett investigate what seems to be an intelligence operative's assassination; Beckett's relationship with Demming strains her relationship with Castle.

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...

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. Meanwhi...

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 han...

When talk show host Bobby Mann (Tom Bergeron) mysteriously dies, Castle is convinced that there was foul play; a guest on Bobby Mann's show (Kelly Carlson) seduces Castle.

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 ...

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 to catch him

Federal Agent Jordan Shaw, an insightful and accomplished Federal investigator teams up with Castle & Beckett to hunt down a cunning and elusive serial killer.

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...

A beloved former major league baseball player is found dead after a goodwill trip to Cuba. The investigation, which includes running into Joe Torre, leads the detectives into New York's Cuban community to solve the murde...

Castle and Beckett investigate the murder of a dead man found in a family's house that just returned from vacations. Meanwhile, Castle is elected as one of New York's 10 most eligible bachelors.

Castle and Beckett investigate the death of an Irish mobster, but while on the case they uncover what may be an international drug smuggling operation, as well as the killer may be involved in the murder of Beckett's mot...

Castle and Beckett are called to a wedding to investigate the murder of a bridesmaid. Castle realizes that the wedding is from a former girlfriend Kyra. Everyone's feelings are compromised, since Kyra has doubts about wh...

Castle and Beckett investigate an art dealer that is shot in his gallery, but the bullet is inexplicably missing from the crime scene. To add to that, the only witness suffers from amnesia.

A man's body is discovered in an apartment building's garbage chute, and two women surface to identify the deceased---his wife and his fiancée. Castle and Beckett's investigation uncovers the man's complex double life...

The murder of an Assistant District Attorney thrusts Castle and Beckett into the world of ex-cons and escorts. But when Castle's desire to help a vulnerable call girl endangers the case, Beckett is forced to decide betwe...

After a bike messenger, carrying a package with content that is able to free a wrongly convicted man from pison, is brutally murdered, Castle and Beckett need to investigate the case. But they are surprised to find out t...

When an up-and-coming rock star's dead body is found staged in a scene straight out of her hit music video, Castle and Beckett delve into the world of obsessed fans, sleazy managers and jealous band members. But it's onl...

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 ...

Castle has a new book agent, Paula Haas, but she talks with him when he has gotten an opportunity that may change his career. The downside is that taking the opportunity would mean the end of his relationship with Becket...

The mysterious circumstances surrounding an Arctic explorer's death take Castle and Beckett to the halls of the CIA; Castle believes the killer may be fooling the investigators.

It's fashion week and Castle and Beckett get to see what happens in the background as they investigate the murder of a model.

Castle and Beckett compete against Ryan and Esposito to see who can solve their murder case first. A few twists make the two teams work together to figure things out.

In the Season 2 opener, Kate and Castle are still at odds over his interference in her personal life, but the pair must work together when a man is found dead in a tree. Meanwhile, Castle struggles to finish his latest n...

Castle and Beckett investigate the murder of a plastic surgeon. Meanwhile, Alexis has her first prom and Castle snoops around Beckett's past and it's up for a surprise.

Castle goes on the search for the murderer when a bomber is killed.

Castle delves into the search for the murderer of a long-underground radical bomber.

Beckett must leave her comfort zone and enter into Castle’s zone of paparazzi’s portraying his date in hopes of causing the “high-end” home invasions and thefts, one which ended in a murder. Mea...

Castle and Beckett look into the Vudon religion when an immigrant is found tortured in a ritualistic killing. Meanwhile on the homefront Castle must deal with the possible homecoming of Alexis' mother, his first wife.

A woman found frozen at a construction site leads Beckett and Castle to reopen a cold case. The probe into the victim's past stirs up unpleasant memories for Beckett, which provides Castle with new book material.

The investigation behind a body found wrapped in a rug on the sidewalk leads Castle and Beckett deep inside the world of New York City politics. The partners discover a world of expensive escorts, arrogant tycoons, corru...

The son of a once wealthy family is found dead in Central Park. As Castle and Beckett are working on the investigation his friends are trying to stop them. Castle isn't sure he can trust Martha to be left alone while he ...

Castle and Beckett work together to solve the murder of a nanny found dead spinning in the dryer of an upscale New York apartment building's laundry room.

Richard Castle is called in to help police after two murders look very similar to murders from his books.