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Castle Season 1 Episodes

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Castle TV Listings Guide Seasons & Episodes Cast

Season 1 Episode Guide

Episode 1 - Season 1, Episode 1: Flowers for Your Grave

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.

Episode 1 - Flowers for Your Grave

Episode 2 - Season 1, Episode 2: Nanny McDead

Castle and Beckett's first case together is to solve the mystery of the death of a young nanny inside a laundry room; their investigation leads to a twisted world of play dates between babysitters and their employers; Castle considers Beckett's character while continuing to write for his "Nikki Heat" series.

Episode 2 - Nanny McDead

Episode 3 - Season 1, Episode 3: Hedge Fund Homeboys

Castle and Beckett investigate the case of a rich teenager found dead of a gunshot wound in a boat in Central Park lake; Castle becomes more involved in Alexis' life and make sure she is on the right track.

Episode 3 - Hedge Fund Homeboys

Episode 4 - Season 1, Episode 4: Hell Hath No Fury

Castle and Beckett investigate the death of an NYC councilman who was running for re-election; Castle's latest book hits the stands and his mother offers only negative reviews.

Episode 4 - Hell Hath No Fury

Castle and Beckett investigate the death of an NYC councilman who was running for re-election; Castle's latest book hits the stands and his mother offers only negative reviews.

Episode 5 - A Chill Goes Through Her Veins

A woman's frozen body is found at a construction site leading Beckett and Castle to reopen a cold case; the case becomes more muddled when they find the husband of the deceased woman was murdered a year ago; the gruesome investigation stirs old memories from Beckett's past.

Episode 5 - Season 1, Episode 5: A Chill Goes Through Her Veins

Episode 6 - Season 1, Episode 6: Always Buy Retail

Following the ritualistic killings of two people, Beckett and Castle enter the world of Vodun and find out the suspect is looking for forged travel papers hidden in a counterfeit bag sold to an unsuspecting woman; Castle's ex-wife, Meredith, decides she is moving back to New York.

Episode 6 - Always Buy Retail

Episode 7 - Home Is Where the Heart Stops

To investigate the murder and robbery of a rich socialite, Beckett poses as Castle's date to a charity ball; Castle seeks information from a jewel thief who finds him very irritating.

Episode 7 - Season 1, Episode 7: Home Is Where the Heart Stops

To investigate the murder and robbery of a rich socialite, Beckett poses as Castle's date to a charity ball; Castle seeks information from a jewel thief who finds him very irritating.

Episode 8 - Ghosts

A crime journalist helps Beckett and Castle in the investigation of a woman who drowned in a bathtub full of motor oil in a seedy motel; Beckett and Castle get involved in a high-stakes game of poker.

Episode 8 - Season 1, Episode 8: Ghosts

Episode 9 - Season 1, Episode 9: Little Girl Lost

Beckett gets a surprise call from the FBI to help out on a kidnapping case, teaming Beckett with her ex-boyfriend which she still has unresolved feelings for; Castle complicates matters by being especially nosy in the investigation.

Episode 9 - Little Girl Lost

Episode 10 - Season 1, Episode 10: A Death In the Family

After a plastic surgeon is found murdered in his car, Castle and Beckett's investigation leads them into a world of surgery-obsessed patients and covert procedures; Alexis attends her first prom.

Episode 10 - A Death In the Family

After a plastic surgeon is found murdered in his car, Castle and Beckett's investigation leads them into a world of surgery-obsessed patients and covert procedures; Alexis attends her first prom.

Episode 11 - Season 2, Episode 1: Deep In Death

Kate and Castle are still at odds with his interference in her personal life, but are forced to work together when they find a dead man in a tree; Castle struggles to finish his latest novel under the pressure of a looming deadline.

Episode 12 - Season 2, Episode 2: The Double Down

When two murders occur on the same night, Castle bets Ryan and Esposito that he and Beckett can solve their case first.

Episode 13 - Season 2, Episode 3: Inventing the Girl

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.

Episode 14 - Season 2, Episode 4: Fool Me Once

Castle and Beckett investigate the mysterious death of an Arctic explorer during a polar expedition; Castle soon grows frustrated when realizing that the elusive killer might just be fooling them all.

Episode 15 - Season 2, Episode 5: When the Bough Breaks

Castle's agent, Paula Haas, approaches him with a career changing opportunity which would signal end of his relationship with Beckett.

Episode 16 - Season 2, Episode 6: Vampire Weekend

Castle and Beckett go into the heart of New York's underground vampire fetish community to investigate the murder of a young man sporting vampire fangs who had a wooden stake driven through his heart.

Episode 17 - Season 2, Episode 7: Famous Last Words

An up-and-coming rock star's body is found in a scene that appears staged from her recent music video.

Episode 18 - Season 2, Episode 8: Kill the Messenger

While investigating the murder of a bike messenger, Castle and Beckett are forced to uncover the scandals and secrets of a prominent family.

Episode 19 - Season 2, Episode 9: Love Me Dead

Castle and Beckett are thrust into the world of ex-cons and escorts while investigating an assistant district attorney's murder; Castle's daughter shares a secret with Beckett.

Episode 20 - Season 2, Episode 10: One Man's Treasure

A dead man is found stuffed in a garbage chute; Castle and Beckett have their hands full when two women arrive to identify the body- the man's wife and his fiancee.

Episode 21 - Season 2, Episode 11: The Fifth Bullet

When an art dealer is shot in his gallery, Castle and Beckett discover that a bullet is missing from the crime scene.

Episode 22 - Season 2, Episode 12: A Rose for Everafter

While investigating the death of a bridesmaid at a wedding, Castle runs into an old flame (Alyssa Milano).

Episode 23 - Season 2, Episode 13: Sucker Punch

When investigating an Irish mobster's death, Beckett and Castle uncover a local turf war that may be connected to an infomercial guru and an international drug-smuggling operation; evidence causes the case to become personal for Beckett.

Episode 24 - Season 2, Episode 14: The Third Man

A family discovers a dead man in the house; Castle is featured as one of New York's most-eligible bachelors.

Episode 25 - Season 2, Episode 15: Suicide Squeeze

A beloved former professional baseball player is murdered; Alexis' genealogy project forces Castle to contemplate the identity of his father.

Episode 26 - Season 2, Episode 16: The Mistress Always Spanks Twice

A half-naked woman is found hanging by bondage cuffs in a public park; the investigation takes Castle and Beckett into New York's underground world of sexual domination.

Episode 27 - Season 2, Episode 17: Tick Tick Tick

An accomplished and insightful federal investigator helps Castle and Beckett track down a serial killer.

Episode 28 - Season 2, Episode 18: Boom!

The serial killer, still at large, taunts Castle, Beckett and Shaw to catch him.

Episode 29 - Season 2, Episode 19: Wrapped Up In Death

The investigation into a museum curator's death takes a bizarre turn when Castle and Beckett learn he is not the first member of a recent archaeological expedition to die.

Episode 30 - Season 2, Episode 20: The Late Shaft

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

Episode 31 - Season 2, Episode 21: Den of Thieves

Castle and Beckett find that Esposito has a personal connection to a suspected killer; Beckett connects with an attractive new detective.

Episode 32 - Season 2, Episode 22: Food to Die For

A well-known chef is found frozen to death in the kitchen of a New York restaurant; Castle shares an attraction with a former classmate of Beckett's.

Episode 33 - Season 2, Episode 23: Overkill

A robbery-homicide prompts Beckett to invite Demming to assist on a case; the investigation becomes a competition for Beckett's attention.

Episode 34 - Season 2, Episode 24: A Deadly Game

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

Episode 35 - Season 3, Season 1: A Deadly Affair

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.

Episode 36 - Season 3, Season 2: He's Dead, She's Dead

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

Episode 37 - Season 3, Season 3: Under The Gun

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.

Episode 38 - Season 3, Season 4: Punked

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

Episode 39 - Season 3, Season 5: Anatomy of a Murder

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 physicians.

Episode 40 - Season 3, Season 6: 3XK

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

Episode 41 - Season 3, Season 7: Almost Famous

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

Episode 42 - Season 3, Season 8: Murder Most Fowl

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

Episode 43 - Season 3, Season 9: Close Encounters of the Murderous Kind

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

Episode 44 - Season 3, Season 10: Last Call

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.

Episode 45 - Season 3, Season 11: Nikki Heat

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.

Episode 46 - Season 3, Season 12: Poof! You're Dead

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

Episode 47 - Season 3, Season 13: Knockdown

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.

Episode 48 - Season 3, Season 14: Lucky Stiff

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

Episode 49 - Season 3, Season 15: The Final Nail

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

Episode 50 - Season 3, Season 16: Setup

While investigating an apparent robbery-homicide, Beckett and Castle discover the victim was involved in a mysterious conspiracy; as the stakes rise, a federal agent (Adrian Pasdar) takes over the case.

Episode 51 - Season 3, Season 17: Countdown

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

Episode 52 - Season 3, Season 18: One Life to Lose

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 a killer.

Episode 53 - Season 3, Season 19: Law & Murder

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

Episode 54 - Season 3, Season 20: Slice of Death

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

Episode 55 - Season 3, Season 21: The Dead Pool

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

Episode 56 - Season 3, Season 22: To Love and Die in L.A.

Against orders, Beckett travels to Los Angeles while investigating her ex-partner's murder; Castle questions Beckett's motives.

Episode 57 - Season 3, Season 23: Pretty Dead

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).

Episode 58 - Season 3, Season 24: Knockout

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.

Episode 59 - Season 4, Episode 1: Rise

Detective Beckett struggles to survive; Castle tries to identify the shooter; Ryan and Esposito try to adjust to the new captain.

Episode 60 - Season 4, Episode 2: Heroes and Villains

Castle and Beckett suspect a costume-clad vigilante is responsible for the mysterious murder of an ex-con.

Episode 61 - Season 4, Episode 3: Head Case

Castle and Beckett investigate a crime scene that involves a large pool of blood but no victim; Alexis receives news about Stanford.

Episode 62 - Season 4, Episode 4: Kick the Ballistics

When a young woman is shot to death, Beckett and Castle learn the gun used was the one a serial killer stole from Detective Ryan.

Episode 63 - Season 4, Episode 5: Eye of the Beholder

A sexy insurance investigator -Kristin Lehman- with a secret helps Castle and Beckett when a valuable sculpture is stolen and someone is murdered.

Episode 64 - Season 4, Episode 6: Demons

Castle and Beckett investigate the murder of a ghost hunter who was looking into a haunting at a New York mansion.

Episode 65 - Season 4, Episode 7: Cops and Robbers

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).

Episode 66 - Season 4, Episode 8: Heartbreak Hotel

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.

Episode 67 - Season 4, Episode 9: Kill Shot

The team searches for a sniper who is terrorizing New York; Beckett tries to hide her worsening PTSD from Castle and the detectives.

Episode 68 - Season 4, Episode 10: Cuffed

Beckett and Castle wake up handcuffed together in bed in a locked room with no memory of how they got there.

Episode 69 - Season 4, Episode 11: Till Death do Us Part

When Castle and Beckett investigate the death of a ladies' man, a twist in the case may disrupt Ryan's wedding.

Episode 70 - Season 4, Episode 12: Dial M for Mayor

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.

Episode 71 - Season 4, Episode 13: An Embarrassment of Bitches

The investigation into the death of a famous dog trainer leads to a reality-TV star.

Episode 72 - Season 4, Episode 14: The Blue Butterfly

Castle and Beckett must investigate a mysterious case from 1947 in order to solve the present-day murder of a treasure hunter.

Episode 73 - Season 4, Episode 15: Pandora

Castle and Beckett discover 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.

Episode 74 - Season 4, Episode 16: Linchpin

Beckett and Castle must stop a series of events that could result in a war.

Episode 75 - Season 4, Episode 17: Once Upon a Crime

When two women are found dead dressed as fairytale characters, Castle and Beckett must race to find the killer before he strikes again!

Episode 76 - Season 4, Episode 18: A Dance With Death

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.

Episode 77 - Season 4, Episode 19: 47 Seconds

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.

Episode 78 - Season 4, Episode 20: The Limey

A detective from Scotland Yard teams up with Castle and Beckett on a murder investigation.

Episode 79 - Season 4, Episode 21: Headhunters

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.

Episode 80 - Season 4, Episode 22: Undead Again

When a dead man is found with human bite marks on his body, a witness claims the deceased was attacked by a zombie.

Episode 81 - Season 4, Episode 23: Always

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.

Episode 82 - Season 5, Episode 1: After the Storm

Castle and Beckett set aside questions about their relationship in order to take on the forces responsible for Beckett's mother's murder.

Episode 83 - Season 5, Episode 2: Cloudy With a Chance of Murder

On Beckett's first day back from suspension, she and Castle investigate a weathercaster's death, and try to hide their relationship from their co-workers.

Episode 84 - Season 5, Episode 3: Secret's Safe With Me

When a woman is murdered, Castle and Beckett think a repossessed storage unit may have a connection to her death.

Episode 85 - Season 5, Episode 4: Murder, He Wrote

Castle's plans with Beckett are disrupted when a dying man stumbles into his backyard and collapses in his pool.

Episode 86 - Season 5, Episode 5: Probable Cause

The investigation into a ritualistic murder turns up evidence linking Castle to the crime, leading Beckett to wonder how well she really knows him.

Episode 87 - Season 5, Episode 6: The Final Frontier

As Beckett and Castle investigate a murder at a sci-fi convention, they encounter avid fans in costume, egotistical celebrities and a lot of drama.

Episode 88 - Season 5, Episode 7: Swan Song

A documentary crew follows Castle, Beckett and the team as they investigate the murder of a rock band's lead guitarist.

Episode 89 - Season 5, Episode 8: After Hours

While retrieving a murder witness, Castle and Beckett are ambushed, forcing them to take the witness on the run.

Episode 90 - Season 5, Episode 9: Secret Santa

The team must solve a case involving a dead Santa who falls from the sky and lands in Central Park. Castle and Beckett celebrate their first Christmas together.

Episode 91 - Season 5, Episode 10: Significant Others

Several angry ex-husbands come under suspicion when a divorce attorney who only represented women is murdered; when Alexis gets sick, Castle's ex-wife moves into the loft to take care of her.

Episode 92 - Season 5, Episode 11: Under the Influence

Castle and Beckett are thrust into New York's raucous music industry as they investigate the murder of an up-and-coming DJ; Esposito takes a troubled teen under his wing.

Episode 93 - Season 5, Episode 12: Death Gone Crazy

When the founder of an adult video franchise is murdered, Beckett and Castle are faced with a lengthy list of suspects; Castle is upset when Alexis starts a revealing video blog.

Episode 94 - Season 5, Episode 13: Recoil

Castle and Beckett discover evidence that links a young woman's murder to Sen. William H. Bracken (Jack Coleman) -- the man responsible for the murder of Beckett's mother; Beckett faces complications as she tries to finally bring Bracken to justice.

Episode 95 - Season 5, Episode 14: Reality Star Struck

The young rising star of "The Wives of Wall Street" is murdered; Castle tries to give Beckett a Valentine's Day gift, but his plans go awry.

Episode 96 - Season 5, Episode 15: Target

A murder investigation reveals a plot to kidnap a wealthy businessman's daughter; FBI Agent Harris (Dylan Walsh) helps Castle and Beckett investigate.

Episode 97 - Season 5, Episode 16: Hunt

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.

Episode 98 - Season 5, Episode 17: Scared to Death

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.

Episode 99 - Season 5, Episode 18: The Wild Rover

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.

Episode 100 - Season 5, Episode 19: The Lives of The Others

While stuck at home with a broken leg, Castle believes he witnesses a murder in the apartment across the street.

Episode 101 - Season 5, Episode 20: The Fast and The Furriest

Beckett and Castle discover giant footprints at the site of a vicious murder, leading the team to wonder if Bigfoot is the killer.

Episode 102 - Season 5, Episode 21: The Squab and the Quail

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.

Episode 103 - Season 5, Episode 22: Still

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.

Episode 104 - Season 5, Episode 23: The Human Factor

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.

Episode 105 - Season 5, Episode 24: Watershed

An interview with a federal law enforcement agency forces Beckett to reconsider her career and her relationship with Castle; a young woman's body is found inside a flop house's water tank.

Episode 106 - Season 6, Episode 1: Valkyrie

Beckett and Castle face the consequences of their decisions during a high-stakes investigation.

Episode 107 - Season 6, Episode 2: Dreamworld

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.

Episode 108 - Season 6, Episode 3: Need to Know

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.

Episode 109 - Season 6, Episode 4: Number One Fan

A desperate murder suspect with a hostage insists on negotiating with Castle.

Episode 110 - Season 6, Episode 5: Time Will Tell

A murder suspect claims he has traveled back in time to prevent terrible events from unfolding.

Episode 111 - Season 6, Episode 6: Get a Clue

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.

Episode 112 - Season 6, Episode 7: Like Father, Like Daughter

Alexis asks Castle for help proving a death row inmate's innocence 72 hours before his execution, but they uncover a secret that could seal the man's fate.

Episode 113 - Season 6, Episode 8: A Murder Is Forever

When a well-known relationship therapist is murdered, it seems that she was targeted due to the secrets she knew about her powerful and elite clients.

Episode 114 - Season 6, Episode 9: Disciple

When a woman who looks very similar to Lanie is murdered, the team thinks the killer may be targeting members of the 12th precinct.

Episode 115 - Season 6, Episode 10: The Good, The Bad & The Baby

A dying man leaves a baby with a priest; Castle and Beckett end up taking care of the baby while they investigate.

Episode 116 - Season 6, Episode 11: Under Fire

Castle and Beckett suspect a serial arsonist of murder; Jenny goes into labor.

Episode 117 - Season 6, Episode 12: Deep Cover

The murder of a video store clerk with a secret history leads the team to Castle's father (James Brolin).

Episode 118 - Season 6, Episode 13: Limelight

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.

Episode 119 - Season 6, Episode 14: Dressed to Kill

When the assistant to Modern Fashion Magazine’s dictatorial editor Matilda King (guest star Frances Fisher) 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 modeling world gets her access to a very special wedding surprise.

Episode 120 - Season 6, Episode 15: Smells Like Teen Spirit

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."

Episode 121 - Season 6, Episode 16: Room 147

A guilt-ridden woman confesses to a murder, but contradictory evidence and a second confession complicate the case.

Episode 122 - Season 6, Episode 17: In the Belly of the Beast

Beckett is asked to assist with a narcotics investigation; when a routine undercover operation goes awry, Beckett is faced with dangerous men from the New York underworld.

Episode 123 - Season 6, Episode 18: The Way of the Ninja

When Castle and Beckett investigate the mysterious murder of a Japanese ballet dancer, they end up being targeted by a ninja assassin.

Episode 124 - Season 6, Episode 19: The Greater Good

An investigation into the murder of a Wall Street trader takes a shocking turn when Castle and Beckett discover Gates' estranged sister is involved.

Episode 125 - Season 6, Episode 20: That '70s Show

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 1970s, so to uncover what he knows, they must play into his delusion, and party like it's the last days of disco.

Episode 126 - Season 6, Episode 21: Law & Boarder

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.

Episode 127 - Season 6, Episode 22: Veritas

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.

Episode 128 - Season 6, Episode 23: For Better or for Worse

On the season finale, 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.

Episode 129 - Season 7, Episode 1: Driven

In the season 7 premiere, after waiting in vain for Castle to arrive at the wedding, Beckett was called to an accident scene to find Castle's car in a ravine, engulfed in flames. Who or what caused the car crash? Is there any way Castle could have survived? The episode will pick-up at the scene of that accident, right where the finale left off, in a premiere that promises to put Beckett through the toughest case of her career.

Episode 130 - Season 7, Episode 2: Montreal

While the team investigates the murder of a toy company CEO, Castle uncovers a lead to his mysterious disappearance, launching him into a dangerous investigation of his own.

Episode 131 - Season 7, Episode 3: Clear and Present Danger

When a pool shark is murdered by an unseen force, Castle and Becket uncover evidence that the killer may have paranormal powers. Meanwhile, Castle and Beckett attempt to get their lives back to normal following his disappearance.

Episode 132 - Season 7, Episode 4: Child's Play

When an ice cream vendor is shot, evidence leads Beckett and Castle to believe that an unknown second-grader may have vital information about the case. Castle goes undercover at an elementary school to try and identify the second-grader but nothing goes as planned.

Episode 133 - Season 7, Episode 5: Meme is Murder

When a web celebrity is murdered, Castle and Beckett explore the flashy world of internet fame. But when the killer posts pictures from the crime scene on a photo-sharing site, they realize they are up against a social media sociopath who may strike again.

Episode 134 - Season 7, Episode 6: The Time of Our Lives

A murder investigation launches Castle into what seems to be an alternate universe where he's never met Kate Beckett. Castle has to convince Beckett, Esposito and Ryan, now complete strangers, to let him participate in their investigation so he can find his way back to his own world. This inspires Castle and Beckett to finally take a trip to the altar.

Episode 135 - Season 7, Episode 7: Once Upon a Time In the West

When Castle and Beckett learn that a murder victim may have been poisoned at an Old West-style resort, they visit the resort posing as newlyweds to uncover the truth.

Episode 136 - Season 7, Episode 8: Kill Switch

When subway passengers, including Detective Esposito, are taken hostage by a mysterious gunman, Castle, Beckett and the team must uncover the gunman's agenda before it’s too late.

Episode 137 - Season 7, Episode 9: Last Action Hero

When the star of Castle's favorite '80s action movie is mysteriously murdered, Castle and Beckett delve into the victim's secret past and pursue his killer with help from a team of aging action heroes.

Episode 138 - Season 7, Episode 10: Bad Santa

When an ER physician is gunned down in the street, Castle and Beckett soon discover that the victim was a mob doctor to a Mafia family run by an old friend of Castle's. Also, against this backdrop of Christmas, Esposito and Lanie reach a defining moment in their relationship.

Episode 139 - Season 7, Episode 11: Castle, P.I.

After being forbidden to work with Kate Beckett or the 12th Precinct, Castle obtains a P.I. license and shows up unannounced at Beckett's crime scene, hoping to investigate alongside her as a private eye. But things don’t go as Castle had planned.

Episode 140 - Season 7, Episode 12: Private Eye Caramba!

When a young Latin telenovela actress is murdered, Beckett and the team delve into a case that is as flamboyant and full of intrigue as any telenovela. Meanwhile, Castle is hired as private investigator by the show’s sultry star to pursue the case from another angle.

Episode 141 - Season 7, Episode 13: I, Witness

Castle is hired to uncover if a client's husband is having an affair, but the case takes a shocking turn when Castle witnesses the client's murder – by her husband. But with no proof that the killing took place, Castle and Beckett must investigate to expose the truth.

Episode 142 - Season 7, Episode 14: Resurrection

When clues in a murder implicate Castle and Beckett's nemesis, Dr. Kelly Nieman (guest star Annie Wersching), Castle is called in to consult on the case. But as the team delves deeper into the investigation, they uncover connections to notorious serial killer Jerry Tyson.

Episode 143 - Season 7, Episode 15: Reckoning

In the second installment of the Castle two-parter, stakes rise as the 12th Precinct matches wits with serial killers Jerry Tyson (3XK) and Dr. Kelly Nieman. With the clock ticking, Castle and the team must crack the case before the killers claim their next victim.

Episode 144 - Season 7, Episode 16: The Wrong Stuff

When an astronaut training for a trip to Mars is mysteriously killed inside a Mars simulation, Castle and Beckett don spacesuits to investigate. But when they discover no one inside the sealed simulation could have committed the murder and no one from the outside could get in, the case takes a shocking turn.

Episode 145 - Season 7, Episode 17: Hong Kong Hustle

After a man is mysteriously murdered in a park, Castle and Beckett team up with a competitive, high-powered female detective from Hong Kong, who has information about the victim. But as Beckett digs deeper into the case, she realizes neither her Hong Kong colleague nor the victim may be quite who they seem.

Episode 146 - Season 7, Episode 18: At Close Range

Detective Kevin Ryan is on the security detail of a charismatic congressman attending a charity event when shots suddenly ring out. Driven to apprehend the killer, Ryan must revisit the events that led up to the shooting, with the help of Castle and Beckett.

Episode 147 - Season 7, Episode 19: Habeas Corpse

When Richie "The Pitbull" Falco, a larger-than-life personal-injury attorney is found dead, Beckett and Castle investigate the many clients and competitors who had motive to kill him. But the mystery deepens when they discover a shocking secret that may be linked to Richie's murder.

Episode 148 - Season 7, Episode 20: Sleeper

A mysterious recurring dream drives Castle and Beckett to seek answers about the two-month period when he went missing. But their search for the truth has deadly consequences.

Episode 149 - Season 7, Episode 21: In Plane Sight

As Castle and Alexis travel to London, their routine flight turns deadly when the plane's Air Marshal is found murdered. With the help of Beckett on the ground, Castle and Alexis race against time to find the killer before he carries out his fateful plan.

Episode 150 - Season 7, Episode 22: Dead from New York

When Sid Ross, the powerful creator of a long-running sketch comedy show is killed, Castle and Beckett are called to investigate. But as they delve into the victim's life and the colorful world of "Saturday Night Tonight," they uncover a shocking secret that may explain Sid's murder.

Episode 151 - Season 7, Episode 23: Hollander's Woods

A death in the woods draws Castle back to a terrifying and defining event in his childhood. Investigation leads to obsession, as he attempts to unearth answers that have eluded him for decades, all while Beckett faces a crossroads of her own.

Episode 152 - Season 8, Episode 1: XY

Castle and Beckett are adjusting to Beckett’s career change, when a call from a mysterious stranger sets off an explosive chain of events.

Episode 153 - Season 8, Episode 2: XX

After receiving a mysterious tip from her past, Beckett is launched into a fight for her life, with a team of mercenaries hot on her trail. As Castle investigates why his wife is on the run, Beckett must figure out who wants her dead, before they can finish the job.

Episode 154 - Season 8, Episode 3: PhDead

When the body of a local college fraternity student is found gruesomely murdered, Castle has to go undercover as a professor in order to gain access to the victim's world. However, he and Beckett soon discover that behind the fun and games of college are some darker secrets the university wants to keep hidden.

Episode 155 - Season 8, Episode 4: What Lies Beneath

When Castle's idol, a famously reclusive author, turns up dead, Castle is determined to solve his hero's murder. But as he and Beckett dig deeper, they discover that truth is stranger than fiction.

Episode 156 - Season 8, Episode 5: The Nose

When a priceless work of art is stolen and its transporter murdered, Castle and Beckett must work with the key witness to track down the painting and sniff out the killer.

Episode 157 - Season 8, Episode 6: Cool Boys

Detective Slaughter returns to enlist Castle's help in solving a high-stakes robbery case. But when a body is found linked to the crime, Slaughter becomes the number one suspect in the heist turned murder, while Castle has to determine whether he's guilty or help to prove he's innocent.

Episode 158 - Season 8, Episode 7: The Last Seduction

In order to hunt down the brutal murderer of a grifting seducer, Castle and Beckett must investigate New York's elite. Meanwhile, Castle plans to surprise Beckett on their one-year wedding anniversary.

Episode 159 - Season 8, Episode 8: Mr. and Mrs. Castle

The winter finale, Castle and Beckett investigate the murder of a cruise ship entertainer, only to find themselves trapped at sea with the killer.

Episode 160 - Season 8, Episode 9: Tone Death

When a body is found in the theater of Martha’s latest show, Castle and Beckett’s investigation leads them into the unexpectedly dangerous world of competitive a capella.

Episode 161 - Season 8, Episode 10: Witness for the Prosecution

Castle finally gets his day in court when he takes the stand as the key witness to a murder from five months ago. But when new information suddenly arises, he and Beckett must race against the clock to prevent a miscarriage of justice.

Episode 162 - Season 8, Episode 11: Dead Red

When the son of a Russian diplomat turns up murdered, Beckett and Castle find themselves in a dangerous game of international crime and punishment.

Episode 163 - Season 8, Episode 12: The Blame Game

Castle is captured and forced to work with strangers to solve deranged puzzles and mind games, while Beckett and the 12th Precinct race against time to rescue Castle and catch a killer.

Episode 164 - Season 8, Episode 13: And Justice for All

Beckett and the 12th Precinct look into the murder of an English as a Second Language student. When the victim's class won't talk to the police, Castle goes undercover as a French Canadian immigrant and learns the victim was more than he seemed.

Episode 165 - Season 8, Episode 14: The G.D.S.

Castle returns to the City of Angels in search of answers about his missing time, but things take a deadly turn when he's recruited by the legendary Greatest Detective Society to help solve a murder.

Episode 166 - Season 8, Episode 15: Fidelis Ad Mortem

When a recruit officer at the NYPD Academy is killed, Beckett and the team go back to their old training ground to investigate. Meanwhile, Castle must reckon with a decision with profound consequences for him and Beckett.

Episode 167 - Season 8, Episode 16: Heartbreaker

A clue at the scene of the death of an armored-car driver leads Beckett and Castle back to an old case solved by Esposito. Complications arise when they learn Esposito might not have been telling them everything about his relationship with the culprit.

Episode 168 - Season 8, Episode 17: Death Wish

The murder of a man connected to smuggling Turkish relics sends Castle, Beckett and the 12th Precinct on a search for a stolen antique believed to be Aladdin's lamp, in hopes that it can lead them to the killer.

Episode 169 - Season 8, Episode 18: Backstabber

After Hayley does a favor for an old friend, she finds herself implicated in a killing and cyber-terror attack. Now, Beckett and Castle must rush to solve the case and clear Hayley's name.

Episode 170 - Season 8, Episode 19: Dead Again

A mild-mannered safety inspector for the city miraculously survives a poisoning by sheer luck; but when he survives another, it's a mystery for Castle and Beckett to solve.

Episode 171 - Season 8, Episode 20: Much Ado About Murder

After a movie star turned theater actor is mysteriously killed, Castle and Beckett go backstage in search of the murderer.

Episode 172 - Season 8, Episode 21: Hell to Pay

When an axe-wielding, escaped psychiatric inmate drops dead in Castle's P.I. office, Castle and Beckett's investigation leads Castle to suspect the victim's death could be the work of the Antichrist.

Episode 173 - Season 8, Episode 22: Crossfire

With their best lead in hand, Castle and Beckett are ready to take on LokSat. But an unforeseen twist puts their case – and their lives – in jeopardy.

Seasons

Season 1 , Season 2 , Season 3 , Season 4 , Season 5 , Season 6 , Season 7 , Season 8

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