Much Ado About Murder: When a theatre actor is murdered during rehearsals for Hamlet, Castle and Beckett snoop backstage and discover that he had more than just his lines to worry about. (S8 Ep20)
Dead Again: When a mild-mannered city inspector miraculously survives an attempted murder, he's considered a lucky man. But when he survives another, his death-defying ways become a mystery. (S8 Ep19)
Backstabber: Hayley is being implicated in a killing and a cyber-terror attack after doing a favour for an old friend. Castle and Beckett must race against time to prove her innocence. (S8 Ep18)
Death Wish: While on a murder case Castle and Beckett search for a stolen antique lamp believed to belong to Aladdin, but the investigation rubs a Turkish smuggling ring up the wrong way. (S8 Ep17)
Crossfire: Castle and Beckett set a trap for the villainous LokSat. But an unexpected twist of fate puts the case, and their future together, in jeopardy. (S8 Ep22)
Hell To Pay: Castle thinks the Antichrist may be involved in the death of an axe-wielding, psychiatric inmate who storms into his P.I. office and duly drops dead! (S8 Ep21)
Much Ado About Murder: When a theatre actor is murdered during rehearsals for Hamlet, Castle and Beckett snoop backstage and discover that he had more than just his lines to worry about. (S8 Ep20)
Dead Again: When a mild-mannered city inspector miraculously survives an attempted murder, he's considered a lucky man. But when he survives another, his death-defying ways become a mystery. (S8 Ep19)
Backstabber: Hayley is being implicated in a killing and a cyber-terror attack after doing a favour for an old friend. Castle and Beckett must race against time to prove her innocence. (S8 Ep18)
Heartbreaker: The murder of an armoured-car driver leads Beckett and Castle back to one of Esposito's old cases, which also happens to involve Esposito's secret jailbird ex-fiancÂee. (S8 Ep16)
Fidelis Ad Mortem: When a recruitment officer at the NYPD Academy is killed, Beckett and the team go back to their roots, visiting their old training ground to track down the killer. (S8 Ep15)
The G.D.S.: Castle returns to L.A. in search of answers about his abduction and memory loss. When he's asked to help the prestigious Greatest Detective Society, things take a deadly turn. (S8 Ep14)
And Justice For All: Castle goes undercover in a language school to investigate the murder of a student. He soon learns that language isn't the only barrier to solving this mysterious case. (S8 Ep13)
Tone Death: The team enters the unexpectedly dangerous world of competitive acapella when the body of an ex-con turned singer is discovered in the same theatre as Martha's latest show. (S8 Ep9)
Mr & Mrs Castle: Castle and Beckett board a cruise ship to investigate the murder of an entertainer, but the case isn't all plain sailing when they become trapped at sea with the killer. (S8 Ep8)
The Last Seduction: Castle must balance his time investigating the murder of a serial seducer with setting up a surprise for Beckett on their one-year wedding anniversary. (S8 Ep7)
Cool Boys: Castle's frenemy Detective Slaughter enlists his help to solve a high-stakes robbery case. But when a body is found linking Slaughter to the crime, the case takes a shocking turn. (S8 Ep6)
Witness for the Prosecution: Castle decides to testify as the key witness in a murder case. But when new evidence is revealed, Castle questions his judgement and races to stop injustice. (S8 Ep10)
Cool Boys: Castle's frenemy Detective Slaughter enlists his help to solve a high-stakes robbery case. But when a body is found linking Slaughter to the crime, the case takes a shocking turn. (S8 Ep6)
What Lies Beneath...: Castle takes it upon himself to solve the murder of his literary hero, but as he digs deeper into the case he learns why people say you should never meet your idols. (S8 Ep4)
Phdead: Whilst attempting to win Beckett back, Castle goes undercover as a literary professor at the college of a murdered frat boy to try and get an insider's perspective on the case. (S8 Ep3)
XX: In the second part of this two-part season premiere Beckett is left fighting for her life. It's an unexpected tip from her past which leads her to uncover exactly who wants her dead. (S8 Ep2)
XY: There are different sides to every story in this two-parter. The explosive chain of events after a mysterious phone call is first told from Castle's perspective in this season premiere. (S8 Ep1)
The Nose: When an art courier is murdered, the only witness to the crime is a sufferer of hyperosmia, a rare disorder heightening her sense of smell. (S8 Ep5)
What Lies Beneath...: Castle takes it upon himself to solve the murder of his literary hero, but as he digs deeper into the case he learns why people say you should never meet your idols. (S8 Ep4)
Phdead: Whilst attempting to win Beckett back, Castle goes undercover as a literary professor at the college of a murdered frat boy to try and get an insider's perspective on the case. (S8 Ep3)
XX: In the second part of this two-part season premiere Beckett is left fighting for her life. It's an unexpected tip from her past which leads her to uncover exactly who wants her dead. (S8 Ep2)
XY: There are different sides to every story in this two-parter. The explosive chain of events after a mysterious phone call is first told from Castle's perspective in this season premiere. (S8 Ep1)
Dead from New York: When the creator of a long-running comedy sketch show is murdered, Castle and Beckett investigate and uncover a shocking secret. Singer Carly Rae Jepsen guest stars. (S7 Ep22)
In Plane Sight: As Castle and Alexis fly to London, their plane hits some turbulence when the Air Marshal is found murdered. Castle must stop the killer before a fiendish plan takes off. (S7 Ep21)
Kill Switch: Castle and Beckett experience delays in an investigation when Esposito follows a cyber-criminal suspect onto a subway car and is held hostage with lots of petrified passengers. (S7 Ep8)
Once Upon a Time in the West: Castle and Beckett finally tie the knot, and the couple go undercover on a case at an Old West-style resort and soon start uncovering secrets of the town's past. (S7 Ep7)
The Time of Our Lives: Castle wakes up in a parallel universe where he and Beckett have never met. A dazed Castle must convince the 12th precinct of his reality to return to it. (S7 Ep6)
Meme is Murder: The team investigates the murder of web celeb. When the killer posts the crime scene online for all to see, the team worries they have a social media sociopath on their hands. (S7 Ep5)
Child's Play: Castle must go undercover in a second grade classroom to track down a witness in the murder of an ice cream vendor, using classroom artwork in place of composite drawings. (S7 Ep4)
Montreal: The team investigate the murder of the CEO of a toy company. Meanwhile Castle, ever the maverick, uncovers a lead to his disappearance and embarks on an investigation of his own. (S7 Ep2)
Driven: Castle is found drifting at sea with no memory of the months after his abduction en route to his and Beckett's wedding. Reunited, they must solve the toughest case of their careers. (S7 Ep1)
For Better or Worse: Castle and Beckett are tying the knot but with the wedding just days away a surprise from Beckett's past, involving a crazy night in Las Vegas, threatens their big day. (S6 Ep23)
Veritas: Beckett's off-the-books investigation into her mother's death goes awry when she's framed for murder. She must clear her name, expose a political conspiracy and close the case. (S6 Ep22)
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)
Probable Cause: Castle becomes the prime suspect for the murder of a woman ritualistically killed in her apartment. Can he prove his innocence when all the evidence points to him? (S5 Ep5)
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)
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)
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)
Probable Cause: Castle becomes the prime suspect for the murder of a woman ritualistically killed in her apartment. Can he prove his innocence when all the evidence points to him? (S5 Ep5)
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)
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)