A Dance With Death: A celebrity is found murdered in her dressing room before strutting her stuff on a dance show, Castle and Beckett must investigate without stepping on each other's toes. (S4 Ep18)
47 Seconds: A bomb goes off at a "Takeover Wall Street" rally, killing 5 people, Castle and Beckett realise they can pinpoint the bomber if they reconstruct the 47 seconds before the blast. (S4 Ep19)
Murder He Wrote: Castle and Beckett's romantic escape to the sleepy Hamptons doesn't quite go as planned when a dying man stumbles into Castle's backyard pool. (S5 Ep4)
The Final Frontier: Beckett and Castle investigate the murder of a woman killed on the set of her favourite TV show during a fan experience at a sci-fi convention. (S5 Ep6)
Swan Song: Beckett and Castle investigate when a rock guitarist is found murdered. Will the documentary filmmakers following the band prove to be a distraction and hinder the team? (S5 Ep7)
Death Gone Crazy: Castle and Beckett investigate when the owner of an adult entertainment company is murdered at a launch party. Meanwhile, Castle is concerned when Alexis starts a vlog. (S5 Ep12)
Recoil: The team investigate when the burning body of a women is discovered by a homeless man. The case becomes personal for Beckett when a Senator is linked to the murdered woman. (S5 Ep13)
Reality Star Struck: Beckett and Castle investigate the cast of 'The Wives of Wall Street' when a star is murdered; Castle's Valentine's Day gift for Beckett falls into the wrong hands. (S5 Ep14)
Target: Castle and Beckett investigate a plot to kidnap the daughter of a powerful tycoon. But the investigation becomes even more critical when Castle learns that Alexis is also missing. (S5 Ep15)
Hunt: The FBI fails to get Alexis back, so Castle takes matters into his hands. Emmy and Golden Globe-winner James Brolin guest stars in the thrilling conclusion to this two-part storyline. (S5 Ep16)
Scared to Death: When a young woman appears to have been frightened to death after watching a "cursed" DVD, Castle and Beckett delve into one of their creepiest cases yet. (S5 Ep17)
Under The Influence: Castle and Beckett become embroiled in the music industry when an aspiring DJ is murdered. Meanwhile, Esposito attempts to help a troubled teenager linked to the case. (S5 Ep11)
Significant Others: Can the team whittle down a list of possible suspects and unearth the killer of a divorce lawyer? Meanwhile, Castle has two extra houseguests: Beckett and his ex-wife. (S5 Ep10)
Secret Santa: It's Christmas Eve and Castle and Beckett's latest case sees them investigate the death of a professional Santa Claus who seemingly fell from the sky. (S5 Ep9)
After Hours: Castle and Beckett find themselves on the run from the mob as they try to protect a key witness. Meanwhile, Beckett and Castle bicker after an awkward dinner with their parents. (S5 Ep8)
Swan Song: Beckett and Castle investigate when a rock guitarist is found murdered. Will the documentary filmmakers following the band prove to be a distraction and hinder the team? (S5 Ep7)
The Final Frontier: Beckett and Castle investigate the murder of a woman killed on the set of her favourite TV show during a fan experience at a sci-fi convention. (S5 Ep6)
47 Seconds: A bomb goes off at a "Takeover Wall Street" rally, killing 5 people, Castle and Beckett realise they can pinpoint the bomber if they reconstruct the 47 seconds before the blast. (S4 Ep19)
A Dance With Death: A celebrity is found murdered in her dressing room before strutting her stuff on a dance show, Castle and Beckett must investigate without stepping on each other's toes. (S4 Ep18)
Once Upon a Crime: A woman dressed as Red Riding Hood is found dead in the woods, and then a murdered Snow White is killed with a poisoned apple, Castle and Beckett set out on a Grimm hunt. (S4 Ep17)
Linchpin: The plot thickens in the second instalment. Castle and Beckett race to put a stop to the 'linchpin' who could kick off a chain of events plunging America into war. (S4 Ep16)
Secret's Safe With Me: When a young woman is found murdered, Castle and Beckett uncover a crucial link to a repossessed storage unit and soon reveal big city 'storage wars'. (S5 Ep3)
Cloudy With a Chance of Murder: Beckett returns from suspension determined to hide her new relationship with Castle from their co-workers. Can they solve the murder of a tv news presenter? (S5 Ep2)
Headhunters: With tensions high between Beckett and Castle, Castle finds a new partner in Detective Ethan Slaughter - but his unconventional 'hands on' style puts Castle in the line of fire. (S4 Ep21)
The Limey: Castle and Beckett join a dishy DI from Scotland Yard on a murder investigation. Meanwhile, Lanie convinces Beckett to admit her feelings for Castle to him before it's too late. (S4 Ep20)
47 Seconds: A bomb goes off at a "Takeover Wall Street" rally, killing 5 people, Castle and Beckett realise they can pinpoint the bomber if they reconstruct the 47 seconds before the blast. (S4 Ep19)
A Dance With Death: A celebrity is found murdered in her dressing room before strutting her stuff on a dance show, Castle and Beckett must investigate without stepping on each other's toes. (S4 Ep18)
Once Upon a Crime: A woman dressed as Red Riding Hood is found dead in the woods, and then a murdered Snow White is killed with a poisoned apple, Castle and Beckett set out on a Grimm hunt. (S4 Ep17)
Linchpin: The plot thickens in the second instalment. Castle and Beckett race to put a stop to the 'linchpin' who could kick off a chain of events plunging America into war. (S4 Ep16)
Demons: Castle and Beckett are left pondering the possibility of paranormal foul play when a world-renowned ghost hunter is inexplicably murdered in a supposed haunted mansion. S4 Ep6)
Pandora: When a convicted murderer, who is part of an international conspiracy, escapes custody Castle must team up with an old CIA flame to hunt him down. (S4 Ep15)
The Blue Butterfly: Castle gets hold of a P.I.'s diary from the 1940s. Will it enable him to solve the murder of a treasure hunter and crack the mystery of a missing diamond necklace? (S4 Ep14)
An Embarrassment Of Bitches: A famous dog trainer is killed, so Castle and Beckett investigate a secret dog breeding programme which leads back to reality star Kay Cappuccio. (S4 Ep13)
Dial M For Mayor: As an investigation implicates Castle's friend, the Mayor, Beckett wants to take him off the case. Things take a turn when Beckett discovers a link to her mother's murder. (S4 Ep12)
Til Death Do Us Part: A serial seducer is killed, leaving behind disgruntled women with motives for his murder. The case takes a twist when it leads to Detective Ryan's bride- to-be. (S4 Ep11)
Cuffed: Castle and Beckett wake up handcuffed, in a sealed room, and with no memory! They must try to piece together how they got there and how to get out! (S4 Ep10)
Kill Shot: As the team searches for a sniper terrorising New York, Beckett's memories of her own shooting bring on PTSD which she tries to hide from Castle and her colleagues. (S4 Ep9)
Heartbreak Hotel: A casino owner's death reveals a link to Atlantic City, so Castle and the boys go to the gambling mecca to 'investigate'... and to throw Detective Ryan a bachelor party. (S4 Ep8)
Demons: Castle and Beckett are left pondering the possibility of paranormal foul play when a world-renowned ghost hunter is inexplicably murdered in a supposed haunted mansion. S4 Ep6)
Kick the Ballistics: Castle and Beckett discover the gun used to murder a woman was an ex-service weapon stolen by serial killer 3XK. Can they track down 3XK before they kill again? (S4 Ep4)
Head Case: Castle and Beckett investigate a crime scene missing one crucial evidence... the victim's body. Meanwhile, Alexis waits to hear news about her application to Stanford (S4 Ep3)
Rise: Whilst Beckett fights for her life after being shot, the 12th Precinct adjusts to life under their new tough and uncompromising captain, Victoria 'Iron' Gates. (S4 Ep1)
Knockdown: Beckett's emotional wounds are reopened when the detective on her mother's case is shot dead in front of her. Is the retired detective's murder linked to a new piece of evidence? (S3 Ep13)
Poof, You're Dead: When the owner of an historic New York Magic shop is found dead, Castle and Beckett must delve into the world of magicians and their secrets. (S3 Ep12)
Nikki Heat: Castle's novel is being adapted to the screen. So, much to Castle's delight and Beckett's dread, the actress playing the lead role joins them on an investigation. (S3 Ep11)
Last Call: Castle and Beckett's investigation into the murder of a bar owner leads them to discover a long held secret which dates back to the Prohibition Era. (S3 Ep10)
Law & Murder: During the trial, Castle and Beckett discover a juror has been killed. They soon uncover that this seemingly innocent juror may be guilty of a crime themselves. (S3 Ep19)
One Life To Lose: When a soap opera writer is killed, Castle and Beckett discover that the show's behind-the-scenes dramas are more scandalous than what happens in front of the camera. (S3 Ep18)
Countdown: In the second instalment of this two-part storyline, Castle and Beckett work with federal agents to stop a domestic terrorist plot and avert a city-wide catastrophe. (S3 Ep17)
Setup: The investigation into the death of a taxi driver leads Castle and Beckett to a mysterious conspiracy involving radioactive material and federal agents. (S3 Ep16)
The Final Nail: Castle and Beckett find themselves at odds when one of Castle's old school friends emerges as a prime suspect in his wife's murder. (S3 Ep15)