Successful New York mystery author Richard 'Ricky' Castle get permission from the mayor, as a personal favor, to seek inspiration and factual documentation by tagging along with a detectives team.
When the new season of “Castle” begins, Beckett hasn’t heard from Castle since he left for the Hamptons months ago to finish writing his second Nikki Heat novel, “Naked Heat” (on sale September 28). The most Beckett, Ryan and Esposito have seen of Castle is a bookstore standee of him advertising an upcoming book signing. So when Beckett and her team burst into a shadowy apartment on the trail of a murderer, the last thing they expect to see is the real-life Castle standing over a dead woman’s body holding a gun! As Castle protests his innocence, Beckett has no choice but to arrest him on suspicion of murder.
Castle and Beckett investigate a case nobody could have seen coming, except for maybe the psychic who was stabbed to death with an ice pick.
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 romantic.
A young mathematician is shot with a 200-year-old bullet, inspiring wild theories by Castle about a time-traveling murderer.
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.
When a beautiful woman is found dead, the evidence indicates a notorious serial killer known as ``The Triple Killer.''
When Beckett and Castle respond to an "officer down'' call, they discover the victim is actually a male stripper dressed as a cop.
While investigating a subway worker's murder in Central Park, Castle and Beckett unexpectedly uncover a boy's abduction.
When a prominent astrophysicist is found dead in her car, Castle is led to theorize her death was the result of an alien abduction.
Castle and Beckett's investigation of a dockworker's murder takes them into the forgotten tunnels and passageways of turn-of-the-century New York.
When Castle's novel ``Heat Wave'' becomes a movie, actress Natalie Rhodes accepts Beckett's invitation to visit and learn about the character she will play; Natalie observes Castle and Beckett's investigation of the murder of a matchmaker.
The owner of a historic magic shop is found dead in Houdini's water torture tank; a new romance comes to light.
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 murder of a lottery winner leaves Castle and Beckett with a wealth of suspects; Martha must decide what to do with her inheritance.
An old friend of Castle's emerges as the prime suspect in his wife's murder.
While investigating an apparent robbery-homicide, Beckett and Castle discover the victim was involved in a mysterious conspiracy.
Castle and Beckett must set aside their differences with Agent Fallon (Adrian Pasdar) while trying to prevent a city-wide catastrophe.
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.
A juror suddenly dies during a high-profile trial involving a murdered socialite.
When a reporter is found dead inside a pizza oven, Castle and Beckett try to determine why he was murdered.
Castle and Beckett investigate the death of a champion swimmer; authors Michael Connelly and Dennis Lehane give Castle advice.
Against orders, Beckett travels to Los Angeles while investigating her ex-partner's murder; Castle questions Beckett's motives.
After a contestant in a beauty pageant is found strangled, many suspects turn up, including jealous fellow contestants, the pageant's sponsor (Michael McKean), and the show's host (Sasha Roiz).
A professional hit man (Max Martini) with information about the murder of Beckett's mother escapes during a court hearing; Castle and the team uncover a deep conspiracy.