Genre: Crime Drama, Comedy
Summary: Bored with his success, celebrated mystery novelist Rick Castle teams with NYPD Detective Kate Beckett to solve the case of a copycat killer who re-creates murder scenes from Rick's novels. While solving the case, the two realize that their unorthodox partnership has its benefits and decide to continue working together. Combining his writer's intuition with her creative detective work, they investigate strange homicides in New York, all the while building a strong, if complicated, relationship with each other.
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S04, E07 (First Aired:
Martha and Castle are held hostage by bank robbers dressed in hospital scrubs; Beckett's rescue efforts are hindered by a strict hostage negotiator (Dean Norris).
S04, E08 (First Aired:
When a casino owner is murdered at an abandoned warehouse, suspects emerge in New York and Atlantic City; during the investigation, Castle throws an impromptu bachelor party for Ryan.
S04, E09 (First Aired:
The team searches for a sniper who is terrorizing New York; Beckett tries to hide her worsening condition from Castle and the detectives.
S05, E15 (First Aired:
A murder investigation reveals a plot to kidnap a wealthy businessman's daughter; FBI Agent Harris (Dylan Walsh) helps Castle and Beckett investigate.
S05, E16 (First Aired:
After the FBI fails to get Alexis back, Castle takes matters into his own hands; Castle learns that his daughter's kidnapping may be a part of a larger and more sinister agenda.
S05, E17 (First Aired:
Castle and Beckett tackle one of their creepiest cases yet when a woman appears to have been scared to death by a ``haunted'' DVD; Castle fears for his life after he accidentally watches the video.
S05, E18 (First Aired:
When a body is discovered in an industrial cake mixer, the murder is traced to an Irish gang and a bar owner named Siobhan O'Doul (Cara Buono); Detective Ryan reveals a history with Siobhan from his time working under cover in narcotics.
S05, E19 (First Aired:
While stuck at home with a broken leg, Castle believes he witnesses a murder in the apartment across the street.
S05, E20 (First Aired:
Beckett and Castle discover giant footprints at the site of a vicious murder, leading the team to wonder if Bigfoot is the killer.
S04, E10 (First Aired:
Beckett and Castle wake up handcuffed together in bed in a locked room with no memory of how they got there.
S04, E11 (First Aired:
When Castle and Beckett investigate the death of a ladies' man, a twist in the case may disrupt Ryan's wedding.
S04, E12 (First Aired:
When a woman is found dead in her car, the investigation leads to New York Mayor Robert Weldon (Derek Webster), one of Castle's longtime friends.
S04, E13 (First Aired:
The investigation into the death of a famous dog trainer leads to a reality-TV star.
S05, E21 (First Aired:
When Beckett is tasked with protecting a charming billionaire whose life is in danger, she reflects on her relationship with Castle; consumed with jealousy, Castle tries to solve the case as quickly as possible.
S04, E14 (First Aired:
Castle and Beckett must investigate a mysterious case from 1947 in order to solve the present-day murder of a treasure hunter.
S04, E15 (First Aired:
Castle and Beckett discover that the killer they are pursuing is part of an international conspiracy, and they must work with a CIA agent with whom Castle has a history.
S04, E17 (First Aired:
When two women are found dead dressed as fairytale characters, Castle and Beckett must race to find the killer before he strikes again.
S04, E18 (First Aired:
The investigation into the death of a contestant on a popular dance competition show leads Castle and Beckett to a shocking secret that may have led to her death.
S05, E22 (First Aired:
When Beckett steps on a pressure-sensitive bomb, the team searches for a way to save her while Castle distracts her by talking about their relationship.
S05, E23 (First Aired:
When a government whistleblower is murdered, Beckett and Castle must figure out who is responsible and determine why Homeland Security is trying to take over the case.
S06, E01 (First Aired:
Beckett and Castle face the consequences of their decisions during a high-stakes investigation.
S06, E02 (First Aired:
Beckett races to find a stolen toxin capable of killing thousands of people; Castle has less than 24 hours to live after being exposed to the chemical weapon.
S06, E03 (First Aired:
Agents Beckett and McCord arrive to take over Castle and the guys' investigation into the death of a former child star, creating tension in the precinct.
S06, E04 (First Aired:
A desperate murder suspect with a hostage insists on negotiating with Castle.
S04, E19 (First Aired:
When a bomb kills five people at a protest rally, Beckett and Castle try to solve the case by reconstructing the 47 seconds prior to the explosion.
S04, E20 (First Aired:
An attractive detective from Scotland Yard (Brett Tucker) teams up with Castle and Beckett to investigate the murder of his friend's daughter; Lanie tries to talk Beckett into making a move on Castle.
S04, E21 (First Aired:
Castle takes on Detective Ethan Slaughter (Adam Baldwin) as his partner when tension between himself and Beckett rises, and he sees a new side to police work that puts him in danger.
S04, E22 (First Aired:
When a dead man is found with human bite marks on his body, a witness claims the deceased was attacked by a zombie.
S04, E23 (First Aired:
Castle tries to protect Beckett as she pursues the man who shot her; the 12th precinct is forever changed as feelings and secrets are revealed.
S05, E01 (First Aired:
Castle and Beckett set aside questions about their relationship in order to take on the forces responsible for the murder of Beckett's mother.