After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for research purposes.
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see all options Availability data: JustWatch
- Seasons
- 8
- Episodes aired
- 173
- Latest aired
- S08E22
- Total runtime
- 5d 6h
Timeline when each season aired
- Season 1 March 2009 – May 2009 10 episodes
- Season 2 September 2009 – May 2010 24 episodes
- Season 3 September 2010 – May 2011 24 episodes
- Season 4 September 2011 – May 2012 23 episodes
- Season 5 September 2012 – May 2013 24 episodes
- Season 6 September 2013 – May 2014 23 episodes
- Season 7 September 2014 – May 2015 23 episodes
- Season 8 September 2015 – May 2016 22 episodes
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S06E01 Valkyrie (1)
September 23 · 44min find the promo
Show synopsis
Last season ended with Beckett wrestling over whether to take a high-profile job in DC -- a dilemma made more complicated when Castle proposed to her. In the Season 6 Premiere of "Castle," Castle and Beckett will deal with the consequences of their decisions against the backdrop of a high-stakes investigation.
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S06E02 Dreamworld (2)
September 30 · 43min find the promo
Show synopsis
Continuing from the season premiere episode, Beckett races against time to find a stolen toxin capable of killing tens of thousands of people. To make matters worse, Castle was exposed, leaving him with less than 24 hours to live.
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S06E03 Need to Know
October 7 · 44min find the promo
Show synopsis
With Beckett still in D.C., Castle and the boys investigate the murder of former child star Charlie Reynolds, who rose to fame playing the lovable nerd on an early 90s High School sitcom. But the case takes a turn for the strange when Agents Beckett and McCord arrive from Washington to take over the investigation, creating competitive tension in the precinct. But why would a washed-up actor's death warrant Federal scrutiny? Whatever the reason, Beckett and McCord aren't telling. Meanwhile, Castle has to contend with a new face at the 12th, NYPD Detective Frank "Sully" Sullivan.
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S06E04 Number One Fan
October 14 · 44min find the promo
Show synopsis
A desperate young murder suspect, Emma Briggs, takes hostages at gunpoint then mysteriously insists that she will only negotiate with one person: Richard Castle.
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S06E05 Time Will Tell
October 21 · 44min find the promo
Show synopsis
A grisly murder investigation leads Castle and Beckett to a suspect who claims he's traveled back in time to stop terrible events from unfolding, events that will change the course of human history. Is he simply a deluded killer, or is it possible that he's telling the truth?
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S06E06 Get a Clue
October 28 · 44min find the promo
Show synopsis
As Castle and Beckett investigate the ritualistic murder of a young woman, they find strange symbols in the victim's apartment; Castle struggles with Alexis' decision to move in with Pi.
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S06E07 Like Father, Like Daughter
November 4 · 44min find the promo
Show synopsis
Alexis enlists Castle’s help on an Innocence Review case to prove that a death row inmate, Frank Henson, was wrongly convicted. With only 72 hours left before his execution, Castle and Alexis (with help from Beckett) urgently investigate the original murder, only to uncover explosive secrets that may seal Frank’s fate.
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S06E08 A Murder Is Forever
November 11 · 44min find the promo
Show synopsis
When a famed relationship therapist is murdered, it appears that her access to the secrets of her elite and powerful clients led to her death. But when Castle and Beckett discover the victim was in possession of a rare object worth millions of dollars, they realize that this case may be even more complicated – and dangerous – than they thought.
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S06E09 Disciple
November 18 · 44min find the promo
Show synopsis
Castle and Beckett arrive at a crime scene to discover that the female victim bears a shocking resemblance to Medical Examiner Lanie Parish. As the team tries to make sense of this mystery, they realize the killer may be targeting detectives of the 12th Precinct. Dr. Kelly Nieman, an exclusive Manhattan cosmetic surgeon who draws Castle and Beckett's interest because of her connection to the victim.
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S06E10 The Good, The Bad & The Baby
November 25 · 44min find the promo
Show synopsis
Before dying, he hands a mysterious bundle to the priest. When the bundle turns out to be a smiling baby boy, Castle and Beckett find themselves accidental nannies to the newborn. But when they determine the baby and the victim were not related, they discover that finding his rightful parents may be just as hard as solving the murder.
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S06E11 Under Fire
January 6 · 44min find the promo
Show synopsis
When Castle and Beckett discover that the victim of a building fire was actually shot to death, they get on the trail of a serial arsonist turned murderer. Meanwhile, Ryan's wife, Jenny, goes into labor, but disaster threatens to ruin the joyous moment.
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S06E12 Deep Cover
January 13 · 44min find the promo
Show synopsis
The murder of a young record store clerk takes a strange turn when the team discovers his past history as a high-level hacker. But it's nothing compared to the shock Castle receives when their investigation leads them straight to his father, Jackson Hunt.
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S06E13 Limelight
January 20 · 44min find the promo
Show synopsis
When a pop star is found dead in an alley, Beckett and Castle look into her hard-partying lifestyle; a shocking revelation rocks the investigation.
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S06E14 Dressed To Kill
January 27 · 44min find the promo
Show synopsis
When the assistant to Modern Fashion Magazine’s dictatorial editor Matilda King is found murdered, Castle and Beckett are thrust into the glitzy, ruthless world of high fashion in their search for the killer. Meanwhile Beckett’s history in the modelling world gets her access to a very special wedding surprise.
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S06E15 Smells Like Teen Spirit
February 17 · 44min find the promo
Show synopsis
The murder of a high school mean girl draws Castle back to one of his many alma maters, where he is giddy to learn that the evidence points to a surprising perpetrator - a teenage telekinetic, throwing he and Beckett into a real-life "Carrie."
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S06E16 Room 147
February 24 · 44min find the promo
Show synopsis
When a guilt-ridden young woman confesses to the murder of a struggling actor -- knowing details only the killer could know -- Beckett and Castle seem to have an open-and-shut case, until they uncover proof that their suspect couldn’t possibly be the killer. When a second person confesses, equally convinced they committed the murder, the team realizes the case is far more mysterious than they thought.
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S06E17 In the Belly of the Beast
March 3 · 44min find the promo
Show synopsis
Beckett is recruited to assist on a Narcotics investigation, but a routine mission turns deadly when an undercover operation goes awry. To survive, Beckett must engage in a battle of wits against some of the most dangerous men in the New York underworld – including a powerful enemy from her past.
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S06E18 The Way of the Ninja
March 17 · 44min find the promo
Show synopsis
When a Japanese ballet dancer is mysteriously murdered, Castle and Beckett's investigation into her secret life uncovers evidence that she was killed by a ninja, and now that ninja is coming after them.
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S06E19 The Greater Good
March 24 · 44min find the promo
Show synopsis
Castle and Beckett investigate the murder of a Wall Street trader, but the case takes a shocking turn when the they discover the victim was an undercover informant for the U.S. Attorney’s office. To complicate matters further, the U.S. attorney involved is Elizabeth Weston, Captain Gates’ estranged sister.
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S06E20 That '70s Show
April 21 · 44min find the promo
Show synopsis
When construction workers find the body of an infamous New York mobster who disappeared in the seventies, Beckett and Castle try to solve this three decade-old mob hit. Unfortunately, their only witness is a man who thinks it’s still the 1970’s, so to uncover what he knows, they must play into his delusion, and party like it’s the last days of disco.
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S06E21 Law & Boarder
April 28 · 44min find the promo
Show synopsis
Castle and Beckett delve into the world of extreme sports when a mysterious motorcyclist shoots an up-and-coming professional skateboarder.
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S06E22 Veritas
May 5 · 44min find the promo
Show synopsis
A secret investigation conducted by Beckett related to her mother's murder goes awry when a man she has been surveilling is killed. When evidence links Beckett to the victim, she and Castle become the targets of a manhunt that puts both of them in grave danger.
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S06E23 For Better or Worse
May 12 · 44min find the promo
Show synopsis
Castle and Beckett's long-awaited wedding is almost here, but when a shocking surprise threatens to ruin the big day, they are sent on a wild mission filled with masked men, angry bikers and a charming ne'er-do-well from Beckett's past.