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All Seasons

Season 1

  • S01E01 Flowers for Your Grave

    • March 9, 2009

    Author Richard Castle joins NYC Detective Kate Beckett to help solve the case of a serial killer, who is reenacting murders from Castle's novels. Castle becomes very intrigued with the murders and continues to shadow Beckett, much to her chagrin.

  • S01E02 Nanny McDead

    • March 16, 2009

    When a body of a young woman is found inside the dryer at a laundry room, Castle and Beckett uncover that the young woman worked as a nanny in the upscale building. Meanwhile, as Castle works on his "Nikki Heat" novel series he watches Beckett's actions as she works the murder case.

  • S01E03 Hedge Fund Homeboys

    • March 23, 2009

    When a teenaged boy whose family has recently fallen on hard times is found dead in a boat in Central Park, Castle and Beckett must piece together the mystery behind the boy's final moments. Meanwhile, Castle mulls over leaving Martha home while he chaperones Alexis' trip to Washington, D.C.

  • S01E04 Hell Hath No Fury

    • March 30, 2009

    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, corrupt investigators, and the effects of betrayal.

  • S01E05 A Chill Goes Through Her Veins

    • April 6, 2009

    Castle and Beckett investigate the murder of a women found frozen and tangled in steel bars at a construction site. The case leads them to look into an old case and also has Beckett thinking about some memories of her past.

  • S01E06 Always Buy Retail

    • April 13, 2009

    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.

  • S01E07 Home Is Where the Heart Stops

    • April 20, 2009

    After discovering a young woman's body stuffed awkwardly into a jewelry safe, Beckett and Castle investigate numerous cases involving murders and home invasion jewel heists.

  • S01E08 Ghosts

    • April 27, 2009

    Castle and Beckett investigate the murder of a woman found drowned in motor oil in a motel bathtub. They seek the help of a true crime journalist who might have a connection to the victim.

  • S01E09 Little Girl Lost

    • May 4, 2009

    When a two-year-old girl is discovered missing from her home, Beckett is called in to assist with the investigation only to discover that the FBI agent in charge is, in fact, her ex-boyfriend. The two of them try to put aside their unresolved feelings as they race to find the girl, but when Castle inserts himself into the investigation, competition quickly heats up for Beckett’s attention.

  • S01E10 A Death in the Family

    • May 11, 2009

    Castle and Beckett investigate the murder of a missing plastic surgeon who is found dead in the front seat of his car after a week of being parked curbside. As they delve into the twisted world of surgery obsessed patients and secret operations, Castle experiences a fatherly rite of passage as Alexis attends her first prom. And while looking into Beckett’s past, he unearths information that could end his relationship with her forever.

Season 2

  • S02E01 Deep in Death

    • September 21, 2009

    Castle has a lot going on. He's trying to finish his new novel Heat Wave and trying to figure out how to fix things with Beckett. But circumstances force the pair back together to investigate the mysterious murder of a man found dead, tangled in the limbs of a tree.

  • S02E02 The Double Down

    • September 28, 2009

    When two separate murders are committed on the same night, Castle wagers Ryan and Esposito that he and Beckett will solve theirs first. The frenzied race to catch their respective killers and win the bet leads each investigative duo to a likely suspect, only to find that they both have airtight alibis. But bizarre twists in both cases force the two teams to work together to unravel the mind-bending mystery behind each murder.

  • S02E03 Inventing the Girl

    • October 5, 2009

    Castle and Beckett get an inside look at the cutthroat world of the New York fashion industry when they investigate the brutal murder of a young model during Fashion Week.

  • S02E04 Fool Me Once...

    • October 12, 2009

    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.

  • S02E05 When the Bough Breaks

    • October 19, 2009

    A body found down a manhole leads to the lonely life of a Czech immigrant recently fired from her job for getting too close to her employer's son. Meanwhile, on the eve of launching Nikki Heat, Castle's agent has an exciting new offer for him; but if he takes it, it would end his work with Beckett.

  • S02E06 Vampire Weekend

    • October 26, 2009

    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.

  • S02E07 Famous Last Words

    • November 2, 2009

    Castle and Beckett investigate the murder of rock star on the rise, in which the body is found like a scene from her latest music video.

  • S02E08 Kill the Messenger

    • November 9, 2009

    After a bike messenger, carrying a package with content that is able to free a wrongly convicted man from prison, is brutally murdered, Castle and Beckett need to investigate the case. But they are surprised to find out that the tragic death is linked to another murder case previously investigated by Captain Montgomery. Now, in order to solve the new murder, Castle and Beckett must dig deep and discover all the secrets of a prominent New York family.

  • S02E09 Love Me Dead

    • November 16, 2009

    Castle and Beckett are thrust into the world of ex-cons and escorts. Meanwhile, Alexis has a private chat with Beckett about something that she's keeping from her father.

  • S02E10 One Man's Treasure

    • November 23, 2009

    When a murdered man is found stuffed in the garbage chute of an apartment building and two women arrive to ID his body — one his wife and the other his fiancee — Castle and Beckett have their hands full keeping the women from killing each other as they work to peel back the layers of the victim's double life. Was it a jilted woman, corporate espionage, or a much darker secret that led to his demise?

  • S02E11 The Fifth Bullet

    • December 7, 2009

    Castle and Beckett uncover that a bullet is missing from the crime scene while investigating what happened when an art dealer was gunned down in his own gallery. However, when it turns out there was a witness to the murder, they need to refresh the man's memory, only to find out that he suffers from amnesia and can't even remember who he is.

  • S02E12 A Rose for Everafter

    • January 11, 2010

    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 as well.

  • S02E13 Sucker Punch

    • January 18, 2010

    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.

  • S02E14 The Third Man

    • January 25, 2010

    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.

  • S02E15 Suicide Squeeze

    • February 8, 2010

    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 murder. Meanwhile, Alexis' genealogy project forces Castle to consider the identity of his unknown father.

  • S02E16 The Mistress Always Spanks Twice

    • March 8, 2010

    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.

  • S02E17 Tick, Tick, Tick... (1)

    • March 22, 2010

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

  • S02E18 Boom! (2)

    • March 29, 2010

    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

  • S02E19 Wrapped Up in Death

    • April 5, 2010

    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?

  • S02E20 The Late Shaft

    • April 12, 2010

    When Castle appears on a late-night talk show to promote his book, Heat Wave, legendary host Bobby Mann leans in during a commercial break and whispers, "they want me dead." When Mann dies later that night, seemingly of natural causes, Castle has to convince Beckett that there was foul play. During the investigation, Castle is seduced by a Hollywood hottie, who was the other guest on Bobby Mann's show the night he died.

  • S02E21 Den of Thieves

    • April 19, 2010

    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 handsome Robbery detective assigned to the case, Tom Demming. Now this romantic triangle must work together to solve the case.

  • S02E22 Food to Die For

    • May 3, 2010

    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.

  • S02E23 Overkill

    • May 10, 2010

    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.

  • S02E24 A Deadly Game

    • May 17, 2010

    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.

Season 3

  • S03E01 A Deadly Affair

    • September 20, 2010

    Beckett and her team burst into an apartment on a murderer's trail, just to be surprised when they see Castle, who they haven't heard or seen in months, standing over a dead woman's body holding a gun. Beckett, has no other choice but to arrest Castle until he proves his innocence.

  • S03E02 He's Dead, She's Dead

    • September 27, 2010

    Beckett and Castle look for the killer of a famous psychic while debating whether extrasensory abilities are real or not. When a letter arrives from the victim predicting her death they must determine who actually wrote the letter – the victim or the killer.

  • S03E03 Under the Gun

    • October 4, 2010

    With the latest case of a murdered bail bondsman, Beckett discovers that Castle's wild imagination and theories may be on the mark. Beckett's ex-partner makes a surprise arrival and Castle is forced to watch the two reminisce and engage in a little romance.

  • S03E04 Punked

    • October 11, 2010

    Castle and Beckett look into the murder of a young mathematician gunned down with a 200-year-old bullet, sparking some wild theories by Castle about a time-traveling killer. When their investigation uncovers a tricked-out DeLorean and a suspect in Victorian clothing, is it possible Castle's crazy idea has some validity?

  • S03E05 Anatomy of a Murder

    • October 18, 2010

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

  • S03E06 3XK

    • October 25, 2010

    When a beautiful woman is found dead in an alley, all clues point to her being a victim of the notorious Triple Killer. The Triple Killer, or 3XK, terrorized New York City four years ago, then mysteriously disappeared. Now he's back. In a deadly battle of wits, Castle and Beckett race against time to stop 3XK before he claims his next victims.

  • S03E07 Almost Famous

    • November 1, 2010

    An "Officer Down" call turns out to be a male stripper dressed like a cop. Castle and Beckett explore the world of male strip clubs and struggling actors, all people in pursuit of fame. They need to determine if the murder was because of the victim's dreams of stardom or something more sinister.

  • S03E08 Murder Most Fowl

    • November 8, 2010

    Castle and Beckett investigate the murder of an NYC subway worker found shot in Central Park. But, while investigating the murder they uncover the abduction of a young boy as well. The team must determine the motives behind the high stakes kidnapping in order to save the young boy's life.

  • S03E09 Close Encounters of the Murderous Kind

    • November 15, 2010

    Castle's latest theory is alien abduction after an astrophysicist's death is found to be from explosive decompression. A well know alien abduction expert gets involved in the case. To complicate things more, a government agent wants to shut down their investigation.

  • S03E10 Last Call

    • December 6, 2010

    Castle and Beckett investigate the murder of a dockworker turned bar owner who's body is found floating in the East River. In the process of the investigation they uncover a secret buried since the days of Prohibition.

  • S03E11 Nikki Heat

    • January 3, 2011

    When Castle's novel "Heat Wave" is turned into a movie, actress Natalie Rhodes, shows up at Beckett's invitation to better understand the character she's going to play. Meanwhile, the threesome investigate the murder of a high-class matchmaker.

  • S03E12 Poof! You're Dead

    • January 10, 2011

    Castle and Beckett investigate the murder of the owner of a historic magic shop found dead in a Houdini's water torture tank. Meanwhile, Lanie and Esposito are trying to keep their relationship secret and Castle ends his relationship with Gina.

  • S03E13 Knockdown

    • January 24, 2011

    When the detective who investigated Beckett's mother's murder is shot before Beckett's eyes before he can give her new evidence in the case, Beckett's old wounds are reopened. The investigation of the detective's death leads the team to an old scheme which may provide the answer to why Beckett's mother was murdered and who ordered it.

  • S03E14 Lucky Stiff

    • February 7, 2011

    The brutal murder of a lottery winner has Castle and Beckett up to their eyeballs in suspects, envious and angered by the victim's sudden move from the poorhouse to the penthouse. As the precinct buzzes with fantasies of what our cops would do if they won the lottery, Martha struggles with the reality of such a decision when she suddenly inherits money she feels she doesn't deserve.

  • S03E15 The Final Nail

    • February 14, 2011

    Castle and Beckett find themselves on opposite sides of the case when Castle's old school friend emerges as the prime suspect in his own wife's murder. As they work to solve the crime, Castle comes to realize that one of two terrible things must be true... Either Detective Beckett is about to arrest an innocent man for murder, or his old friend is a cold-blooded killer.

  • S03E16 Setup (1)

    • February 21, 2011

    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 rise, hard-charging federal agent Mark Fallon takes over the investigation. Together, Fallon, Beckett and Castle must race to unmask the truth about the victim before it's too late.

  • S03E17 Countdown (2)

    • February 28, 2011

    With time running out, Castle and Beckett must put aside their differences with Agent Fallon to avert a city-wide catastrophe.

  • S03E18 One Life to Lose

    • March 21, 2011

    Castle and Beckett investigate the axe murder of the head writer for a long time New York soap opera. Everyone is suspect when it's discovered that the action behind the scenes plays out as good as the on-air storylines.

  • S03E19 Law & Murder

    • March 28, 2011

    When a juror dies during the high profile trial of a murdered socialite, Castle and Beckett discover that the juror wasn't really as perfect as he appeared to be.

  • S03E20 Slice of Death

    • April 4, 2011

    When a reporter is found dead inside a restaurant's pizza oven, Beckett and Castle go to work on solving the case. They must figure out if his story "The Pizza Wars" is what got him killed or if there's something more to the story.

  • S03E21 The Dead Pool

    • April 11, 2011

    When a champion swimmer and Olympic hopeful is found dead in a training pool, Castle and Beckett dive in to investigate his murder, and uncover myriad secrets that might have led to his death.

  • S03E22 To Love and Die in L.A.

    • May 2, 2011

    While investigating the shooting death of her ex-partner in New York, Beckett comes to believe the suspect has fled to Los Angeles. Against orders, she travels to L.A., going renegade to track down the killer, with Castle unexpectedly along for the ride. As they dig deeper into the motives, they uncover a trail that leads from a rooftop pool in Hollywood to the sandy beach of Santa Monica. Along the way, they visit the set of the "Heat Wave" movie (based on Castle's book) and enlist the cast to help break the case. But as they get closer to apprehending the killer, Castle begins to wonder whether Beckett is out for justice or revenge.

  • S03E23 Pretty Dead

    • May 9, 2011

    During rehearsal for "Baron's All-American Beauty Pageant," the contestants are shocked to discover the body of Miss Illinois - strangled, but by whom? As Castle and Beckett delve into the cut-throat competition of the pageant world, they learn that a number suspects had motive for murder, including jealous fellow contestants, the pageant's larger-than-life millionaire sponsor, Victor Baron, and the show's host -- hedonistic TV personality, Bobby Stark.

  • S03E24 Knockout

    • May 16, 2011

    Beckett's investigation into her mother's death is reactivated when Hal Lockwood - a professional hitman with knowledge of Beckett's mother's murder - stages a spectacular escape during a court hearing. As police launch a manhunt for Lockwood, Castle and the team uncover evidence of a deeper conspiracy involving a mysterious figure with law enforcement connections who is linked to both Lockwood's escape and the killing of Johanna Beckett.

Season 4

  • S04E01 Rise

    • September 19, 2011

    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 brutal shooting. Meanwhile, back at the precinct, Ryan and Esposito have to adjust, as Victoria "Iron" Gates becomes the precinct's new uncompromising Captain.

  • S04E02 Heroes and Villains

    • September 26, 2011

    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 costume -- and may indeed be a Superhero. Can they capture and unmask the killer before he strikes again?

  • S04E03 Head Case

    • October 3, 2011

    A murder scene complete with lots of blood but no victim and high tech life-extension science are all part of the investigation as Castle and Beckett try to solve a murder without a body. Meanwhile, Alexis waits to hear news about her application to Stanford.

  • S04E04 Kick the Ballistics

    • October 10, 2011

    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 stolen by the serial killer, 3XK. Now with the clock ticking, the team must work to solve the murder, track down 3XK and retrieve Ryan's gun before the killer strikes again.

  • S04E05 Eye of the Beholder

    • October 17, 2011

    Castle and Beckett work a murder case around the theft of a valuable sculpture. Serena Kaye, a smart, sexy insurance investigator, joins Castle and Beckett in the investigation, but she also has her eyes set on Castle, all the while hiding a very important secret from the team.

  • S04E06 Demons

    • October 24, 2011

    Castle and Beckett confront the possibility of paranormal foul play when a world renowned ghost hunter is mysteriously murdered while investigating a haunting at a legendary New York mansion.

  • S04E07 Cops & Robbers

    • October 31, 2011

    When Castle and Martha are taken hostage by a crew of bank robbers dressed in hospital scrubs and using classic television doctor names, Beckett finds herself on the outside, desperately trying to rescue them -- which proves to be even more difficult with a by-the-book hostage negotiator watching her every move. Castle becomes the de facto leader of the hostages and discovers that the robbery is actually a skillfully orchestrated distraction for an even more sinister plan. But with Castle stuck on the inside and Beckett on the outside, will either be able to foil the bank robbers' plans before it is too late?

  • S04E08 Heartbreak Hotel

    • November 7, 2011

    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 together, Castle naturally chooses to join the detectives for the road trip to "America's Playground," hoping to help solve the case while throwing an impromptu bachelor party for Ryan.

  • S04E09 Kill Shot

    • November 21, 2011

    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 toughest case yet. The hunt is made even more complicated when Beckett begins to experience increasingly strong moments of PTSD - moments she tries hard to hide from Castle and the detectives.

  • S04E10 Cuffed

    • December 5, 2011

    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 two of them adjust to being shackled together, what's the biggest threat they face... the people who abducted them or each other? Meanwhile, Ryan, Esposito and Gates are left to investigate their disappearance in a case where all is not what it seems.

  • S04E11 Till Death Do Us Part

    • January 9, 2012

    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 Jenny.

  • S04E12 Dial M for Mayor

    • January 16, 2012

    It was longtime Castle friend Mayor Weldon's political clout that allowed Castle to partner up with Beckett. But now, when a woman is found dead in a car that traces back to the Mayor's motor pool, that partnership comes under fire as the scandal surrounding the investigation threatens to bring down Weldon's administration.

  • S04E13 An Embarrassment of Bitches

    • January 23, 2012

    When a famous dog trainer is killed, the investigation keeps coming back to charismatic reality TV star Kay Cappuccio. Kay, a favorite of tabloids and gossip websites the world over, has achieved stardom without possessing any discernible skill or talent. But there seems to be more to her story than she is letting on -- does that include murder?

  • S04E14 The Blue Butterfly

    • February 6, 2012

    When Castle and Beckett investigate the killing of a treasure hunter, they discover the case is linked to a mysterious homicide from 1947 involving a hard-boiled private detective. Castle realizes the only way to solve the present-day murder is to solve the murder from the past. The 1947 case comes to life through stylized flashbacks, featuring Castle as the private eye and Beckett as a femme fatale.

  • S04E15 Pandora (1)

    • February 13, 2012

    Castle and Beckett pursue a ruthless killer who, they discover, is part of a sinister, international conspiracy. Castle and Beckett are joined on the case by Sophia Turner, a smart, sexy CIA operative who has a complicated past with Castle.

  • S04E16 Linchpin (2)

    • February 20, 2012

    Castle and Beckett race to stop a series of events that could lead the U.S. into war, and their efforts continue to put Castle in CIA agent Sophia Conrad's orbit.

  • S04E17 Once Upon a Crime

    • February 27, 2012

    When a woman dressed as Red Riding Hood is found dead in the woods with claw marks covering her body, and soon after a murdered Snow White is discovered with a poison apple in her hand, Castle and Beckett find themselves on a Grimm hunt to catch a fairytale killer before he kills again. But nothing is as it seems in a case filled with deceit, betrayal, secrets and murder.

  • S04E18 A Dance with Death

    • March 19, 2012

    When Odette Morton, a contestant on the hit competition show "A Night of Dance," is found murdered in her dressing room, Castle and Beckett must navigate the case's many twists and twirls without stepping on each other's toes. But as they delve into Odette's past, they discover that this reality starlet was harboring a shocking secret that may have led to her death.

  • S04E19 47 Seconds

    • March 26, 2012

    When a bomb explodes at a protest rally killing five people, Castle and Beckett realize the key to solving the case is to reconstruct the 47 seconds prior to the explosion. Using video and witness accounts, they uncover the shocking truth about who planted the bomb.

  • S04E20 The Limey

    • April 2, 2012

    A devilishly handsome detective from Scotland Yard, Simon Hunt, teams up with Castle and Beckett to find the person responsible for the murder of his friend's daughter. Enter Nigel Wyndham, the Deputy General at the British Consulate whom Castle and Beckett suspect is up to more than just ambassadorial balls and diplomatic luncheons. Meanwhile, Lanie convinces Beckett that she needs to make a move on Castle before it is too late.

  • S04E21 Headhunters

    • April 16, 2012

    With tensions rising between Castle and Beckett, Castle finds himself a new partner -- Detective Ethan Slaughter, a tough and colorful cop from the city's gang unit. But Castle gets more than he bargained for when Slaughter shows him a grittier side of police work that puts Castle in the line of fire like never before.

  • S04E22 Undead Again

    • April 30, 2012

    When Castle and Beckett investigate the murder of a man with human bite marks on his body, Castle’s wild theories start flying. But none are as wild as what their only witness insists happened – a Zombie attack. As the evidence pointing towards an undead assailant piles up, the team plunges into New York’s Zombie subculture to find the killer and bring him in — dead, undead or alive.

  • S04E23 Always

    • May 7, 2012

    When the murder of an Army veteran puts Beckett on the trail of the man who shot her, Castle must decide how much he's willing to sacrifice to keep her safe. As secrets are revealed and feelings are put on the table, the lives of the detectives at the 12th Precinct may never be the same.

Season 5

  • S05E01 After the Storm

    • September 24, 2012

    After four seasons of "will they" or "won't they," Richard Castle and Kate Beckett finally gave in to their feelings for each other. Season 5 picks up on the proverbial morning after, with Castle and Beckett facing new questions -- Was this a one-time fling, or are they now a couple? But before they find the answers, they must take on the forces responsible for Beckett's mother's murder that now threaten Kate Beckett's life.

  • S05E02 Cloudy With a Chance of Murder

    • October 1, 2012

    On Beckett's first day back from her suspension, she and Castle are thrown into the salacious world of local TV news when WHNY's veteran weather girl is found dead. As if navigating an industry full of backstabbing and ruthless ambition weren't difficult enough, they have to do it while hiding their new relationship from their coworkers.

  • S05E03 Secret's Safe with Me

    • October 8, 2012

    When a young woman is mysteriously murdered, Beckett and Castle discover her death may be linked to a repossessed storage unit up for auction. Was the unit connected to her death? Was something inside it worth killing for? The investigation leads Castle and Beckett to colorful “Storage Wars”-like treasure seekers and Manhattan socialites as they uncover the shocking truth.

  • S05E04 Murder, He Wrote

    • October 15, 2012

    Castle and Beckett’s plans for a romantic weekend in the Hamptons are interrupted when a dying man stumbles into Castle’s backyard, collapsing into his pool. Unable to escape the lure of the investigation they join up with the small town’s well-intentioned, but inexperienced sheriff to find the killer.

  • S05E05 Probable Cause

    • October 29, 2012

    While investigating a shocking ritualistic murder, Beckett and her team uncover surprising evidence linking Castle to the killing. As the evidence against him mounts, loyalties are tested. And when surprising revelations come to light, Beckett begins to wonder how well she really knows her new lover and partner of four years.

  • S05E06 The Final Frontier

    • November 5, 2012

    When a body is found at a sci-fi convention, Castle and Beckett are warped into the heart of fandom -- a world of egotistic celebrities, diehard costumed fans and enough drama for two galaxies.

  • S05E07 Swan Song

    • November 12, 2012

    When the lead guitarist of a rock band is murdered, the documentary crew that were following the band turn their cameras on Castle, Beckett and the team as they try to solve the case. The result is a documentary style episode of "Castle," which offers us a unique glimpse at our characters as they navigate a world that goes far beyond the rock & roll stage.

  • S05E08 After Hours

    • November 19, 2012

    In the aftermath of a disastrous "Meet the Parents" dinner, a bickering Castle and Beckett are sent to retrieve the only witness to a murder, but they get ambushed and are forced to take the witness on the run. Stranded in the middle of the night in a bad part of town, with no phone, badge or gun, Castle and Beckett must find a way to protect him from a team of mobsters -- that is, if they don't kill each other first.

  • S05E09 Secret Santa

    • December 3, 2012

    When a bearded, rotund man in a red Santa suit with an ID reading Kris Kringle falls from the sky in Central Park, Castle and Beckett are on the hunt to find the person who killed Santa. But everything isn't holiday cheer, as they discover St. Nick may have been more naughty than nice. Meanwhile, Castle and Beckett prepare for their first Christmas together.

  • S05E10 Significant Others

    • January 7, 2013

    When a powerful divorce attorney who only represented women is murdered, Castle and Beckett are confronted with a plethora of angry ex-husbands, any one of whom could be the murderer. Meanwhile, Castle's ex-wife (Darby Stanchfield), Meredith, moves into the loft to take care of Alexis while she recovers from Mono, and to make matters worse, Beckett is also forced to move in while her apartment is being fumigated, causing tension, humor and more than a little awkwardness.

  • S05E11 Under the Influence

    • January 14, 2013

    When an up and coming DJ is killed at a pop star's album release party, Beckett and Castle must dive into the raucous world of New York's music industry. Then, when the investigation leads to a troubled teenager, Esposito takes the kid under his wing, hoping to put him on the right track before it's too late.

  • S05E12 Death Gone Crazy

    • January 21, 2013

    When Beau Randolf, the founder of hit adult video franchise "College Girls Gone Crazy," is murdered, Castle and Beckett are confronted with a lengthy list of husbands, fathers and ex-college girls who all have motive. So to find the killer, they must delve deep into the victim’s life, where they find surprises at every turn. Also Alexis starts a video blog, but Castle is not happy that personal and intimate details about her life are being made public.

  • S05E13 Recoil

    • February 4, 2013

    While investigating the murder of a young woman, Castle and Beckett find evidence that links her death with Senator William H. Bracken (Jack Coleman), the man responsible for Beckett's mother's murder. Determined to finally bring Bracken to justice, Beckett soon realizes that things are far more complicated than they seem.

  • S05E14 Reality Star Struck

    • February 11, 2013

    Castle & Beckett get an up-close-and-personal view of a "Real Housewives"-esque reality TV series, "The Wives of Wall Street," when they investigate the murder of the show's rising young star. Meanwhile, Castle's attempt to give Beckett a Valentine's Day gift goes horribly wrong.

  • S05E15 Target (1)

    • February 18, 2013

    In the first of a two-episode story arc, Castle and Beckett begin a murder investigation that also exposes a plot to kidnap the daughter of a wealthy Middle Eastern businessman. FBI Agent Harris (Dylan Walsh), an even-keeled professional is brought in to help find the kidnappers.

  • S05E16 Hunt (2)

    • February 25, 2013

    In the powerful conclusion of a two-episode story arc, when the FBI fails to get his daughter back, Castle takes matters into his own hands, reaching out to a shadowy fixer to help him recover Alexis. But Castle soon learns that his daughter's kidnapping may be part of an even more sinister agenda.

  • S05E17 Scared to Death

    • March 18, 2013

    When a young woman appears to have literally been scared to death three days after watching a "haunted" DVD, Castle and Beckett delve into one of their creepiest cases yet. To make matters worse, Castle becomes convinced that he too is marked for death when he accidentally watches the cursed video.

  • S05E18 The Wild Rover

    • March 25, 2013

    When a man is found dead in an industrial cake mixer, Castle and Beckett trace the murder to an Irish gang in Staten Island and a beautiful bar owner named Siobhan O’Doul (Cara Buono). Much to everyone’s surprise, Detective Ryan has a complicated history with Siobhan and the Staten Island crime family from his days working undercover in narcotics. When the case hits a dead end, Ryan must go back undercover to expose the killer, complicating his relationship with his wife.

  • S05E19 The Lives of Others

    • April 1, 2013

    In the show’s 100th episode, Castle finds himself in the unfortunate position of NOT being able to work a case. While he’s holed up in the loft with a broken leg, Beckett goes off to investigate the death of an IRS agent without him, leaving Castle miserable and bored. But when he thinks he witnesses the murder of a young woman in the apartment across the street, he is thrown into a "Rear Window"-esque murder mystery that hits much too close to home.

  • S05E20 The Fast and the Furriest

    • April 15, 2013

    When Castle and Beckett find giant footprints at the site of a vicious murder, the team is forced to confront the unlikely theory that Bigfoot is the killer. But as they trek into the world of primate research, big game hunting and mythological creatures, they realize that finding the man (or beast) responsible may put them on the endangered species list.

  • S05E21 Still

    • April 29, 2013

    Beckett's life is on the line when she steps on a pressure sensitive bomb. While the team searches for a way to disarm the explosive, Castle distracts Beckett by arguing with her about who fell for whom first.

  • S05E22 The Squab and the Quail

    • April 22, 2013

    When Beckett is assigned to protect Erik Vaughn, a charming billionaire entrepreneur whose life is in danger, she's forced to reflect on her relationship with Castle which has begun to plateau. Meanwhile, consumed with jealousy, Castle goes to extraordinary lengths to solve the case and separate the two of them.

  • S05E23 The Human Factor

    • May 6, 2013

    When Homeland Security inexplicably seals the crime scene of a car bombing, Castle and Beckett find themselves with two mysteries on their hands: who murdered the victim, a government whistleblower, and why are federal agents trying to take over the case? The plot thickens when they discover that the victim wasn't killed by a car bomb but by a missile from a military drone.

  • S05E24 Watershed

    • May 13, 2013

    In the season finale, an interview with a high-profile federal law enforcement agency forces Beckett to reconsider what she wants out of her job and out of her relationship with Castle. Meanwhile, the body of a young woman is found floating inside the water tank of a skid row flop house, but as the team investigate, they discover that her final resting place is just one of many strange things about her death.

Season 6

  • S06E01 Valkyrie (1)

    • September 23, 2013

    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.

  • S06E02 Dreamworld (2)

    • September 30, 2013

    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.

  • S06E03 Need to Know

    • October 7, 2013

    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. Meanwhile, Castle has to contend with a new face at the 12th, NYPD Detective Frank "Sully" Sullivan.

  • S06E04 Number One Fan

    • October 14, 2013

    A desperate young murder suspect, Emma Briggs, takes hostages at gunpoint then mysteriously insists that she will only negotiate with one person: Richard Castle.

  • S06E05 Time Will Tell

    • October 21, 2013

    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?

  • S06E06 Get a Clue

    • October 28, 2013

    Castle and Beckett investigate the bizarre murder of a young woman who was found ritually posed. When the team finds a collection of strange symbols in her apartment and the prime suspect turns out to be a mysterious monk, Castle becomes convinced they’ve stumbled onto a “Da Vinci Code” style conspiracy. Meanwhile, Castle tries to come to grips with the fact that Alexis and Pi have moved in together.

  • S06E07 Like Father, Like Daughter

    • November 4, 2013

    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.

  • S06E08 A Murder Is Forever

    • November 11, 2013

    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.

  • S06E09 Disciple

    • November 18, 2013

    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.

  • S06E10 The Good, The Bad & The Baby

    • November 25, 2013

    A bleeding man stumbles into a church, but just 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.

  • S06E11 Under Fire

    • January 6, 2014

    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.

  • S06E12 Deep Cover

    • January 13, 2014

    The murder of a young video 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.

  • S06E13 Limelight

    • January 20, 2014

    When a rising young pop star is found dead in an alley, Castle and Beckett delve into the victim's out-of-control hard-partying lifestyle, but as they dig deeper, a shocking revelation threatens to rock their investigation.

  • S06E14 Dressed to Kill

    • February 3, 2014

    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.

  • S06E15 Smells Like Teen Spirit

    • February 17, 2014

    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."

  • S06E16 Room 147

    • February 24, 2014

    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.

  • S06E17 In the Belly of the Beast

    • March 3, 2014

    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.

  • S06E18 The Way of the Ninja

    • March 17, 2014

    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.

  • S06E19 The Greater Good

    • March 24, 2014

    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.

  • S06E20 That '70s Show

    • April 21, 2014

    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 Mafia 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.

  • S06E21 Law & Boarder

    • April 28, 2014

    When an up-and-coming professional skateboarder is gunned down by a mysterious motorcyclist, Castle and Beckett are thrust into the world of extreme sports, where the death defying stunts aren’t the only thing that’s dangerous.

  • S06E22 Veritas

    • May 5, 2014

    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.

  • S06E23 For Better or Worse

    • May 12, 2014

    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.