An investigation into a death in the woods brings Castle back to an event from his childhood.
Castle and Beckett investigate the death of the creator of a long-running sketch show. Carly Rae Jepsen is featured as a musical guest.
When the Air Marshal is murdered on Alexis and Castle's flight, they must find the killer.
A recurring dream inspires Castle and Beckett to look for answers about Castle's disappearance.
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.
Ryan ends up in the middle of an assassination plot while on the security detail of a congressman.
A detective from Hong Kong with information on a murder victim teams up with Beckett and Castle.
An astronaut is killed inside a Mars simulation; a discovery results in a shocking turn in the case.
The 12th precinct tries to stop Dr. Kelly Nieman and Jerry Tyson before they claim another victim.
Evidence in a young woman's murder implicates Dr. Kelly Neiman -- Castle and Beckett's nemesis.
A woman hires Castle to see if her husband is cheating on her -- but things take a shocking turn.
Beckett and the team investigate the death of a young telenovela actress.
Unable to work alongside Kate or the 12th Precinct, Castle gets his private investigator license.
Castle and Beckett discover an ER doctor who was gunned down in the street was a mob doctor.
A team of aging action heroes helps Castle and Beckett investigate an actor's murder.
Esposito is among subway passengers taken hostage by a mysterious gunman.
Castle and Beckett go under cover as newlyweds at an Old West-style resort to investigate a murder.
An investigation forces Castle into what seems like an alternate world where he and Kate never met.
When crime scene pictures show up on a website, the investigators worry the killer may strike again.
Castle goes under cover to try to find a child who may have information about a shooting.
The investigation into a pool shark's death reveals that the killer may have had paranormal powers.
As the team investigates the murder of a toy company CEO, Castle engages in his own investigation.
Beckett is faced with the toughest case of her career after finding Castle's car engulfed in flames.