On route to London, Castle and Alexis' routine flight turns deadly when the plane's Air Marshal is found murdered. With Beckett's help on the ground, they race to find the killer before he carries out his deadly plan.moreless
Ryan's assignment as part of a congressman's security detail at a charity event puts him in the middle of an assassination plot. Castle and Beckett help him re-examine the events leading up to the shooting to apprehend the killer.moreless
When an astronaut in a Mars simulation is killed, Castle and Beckett don spacesuits and enter the simulation to investigate. Much to their surprise, it seems no one inside and no one outside could have committed the murder.moreless
Part 1 of 2. Castle and Beckett encounter an old rival, Dr. Kelly Nieman, while looking at clues in a woman's mysterious murder, and then further investigation links an infamous serial killer to the crime.moreless
While Beckett and her team investigate the murder of a young telenovela actress, Castle is hired by the show's star to follow the case from a different angle.
When Castle is prohibited from working with Beckett or the 12th Precinct he gets his P.I. license and shows up at Beckett's crime scene as a private investigator, where things don't go as planned.moreless
Castle and Beckett's investigation into the shooting death of an ER physician leads them to a Mafia family run by an old friend of Castle's. Esposito and Lanie reach a defining moment in their relationship.moreless
Castle and Beckett investigate an Internet star's murder and find photos of the crime posted online by the killer, leading them to believe they're dealing with a social-media sociopath who may be looking for more victims.moreless
Castle goes undercover at an elementary school to find the second-grader who may possess information about the shooting of an ice cream vendor.
Castle and Beckett discover that the killer of a pool shark may have psychic powers as they hunt for the "invisible man". Castle and Beckett make an effort to get their lives back to normal.moreless
As the rest of team looks into the death of a toy company's CEO, Castle starts his own investigation after finding a lead in his mysterious disappearance.
The season 7 premiere picks up right where last season's finale left off. As Castle was driving to his wedding a black SUV came roaring at him. Beckett is worried when Castle doesn't show up but soon she is called to an accident scene where Castle's car is engulfed in flames. Now Beckett must find who or what caused the crash and determine if Castle could have survived.moreless
In the sixth-season finale, Castle and Beckett prepare for their wedding. However, an unwelcome surprise may ruin things, so they embark on a zany adventure, encountering masked men and mad bikers along the way.moreless
Beckett conducts a covert investigation related to her mother's murder but things go terribly wrong when the subject under surveillance is killed. Castle and Beckett become the object of a manhunt when evidence connects Beckett to the victim.moreless
Castle and Beckett delve in the world of extreme sports after a professional skateboarder is gunned down.
The body of a missing New York mobster who disappeared in the seventies is found at a construction site, but the only witness thinks it's still the 1970's. Castle and Beckett must play along with his delusion to find out what he knows.moreless
Investigating the death of a Wall Street trader leads Castle and Beckett to discover that the victim was an undercover informant for the U.S. Attorney’s office. To make matters worse, the U.S. attorney involved is Captain Gates' estranged sister.moreless
After a Japanese ballet dancer is inexplicably murdered, Castle and Beckett find that her secret life provides evidence of a ninja assassin, and now that ninja is after them.
When Beckett helps out on an undercover Narcotics investigation, the mission turns deadly. To survive, Beckett is forced to use her wits with some of New York's dangerous underworld and a powerful enemy from her past.moreless
Castle and Beckett seemingly have an open and shut murder case when a woman confesses to having murdered a struggling actor. But when they determine the woman couldn't have done it, another comes forward to confess just as convinced they did the murder. The team realizes that multiple confessions by strangers have made this a mysterious case indeed.moreless
Castle and Beckett make their way through the glitzy world of high fashion to find who killed a magazine editor's assistant. Access to a very special wedding surprise is provided to Beckett.
Castle and Beckett investigate the murder of a rising pop diva. As they look into her out-of-control partying lifestyle, a shocking eye-opener endangers their investigation.
Castle and Beckett work the murder case of a famed relationship therapist. While it first appears that client secrets may have been the motivating factor, a rare valuable object discovered in the victim's possession makes the case much more complicated.moreless
Castle's convinced a "Da Vinci Code" type conspiracy is at play when strange symbols and a mysterious monk are involved in the bizarre murder of a young woman. Elsewhere, Alexis and Pi move in together.moreless
Castle and Beckett must sort out the truth when investigating a murder suspect who claims he's from the future.
When a murder suspect takes hostages, she'll only deal with Richard Castle.
Beckett's still in D.C., so Castle is at the precinct helping Esposito and Ryan investigate the murder of a former child star. But before much can be done, and without explanation, Beckett and McCord show up and take over the case. A new detective has been assigned to the 12th, NYPD Detective Frank "Sully" Sullivan.moreless
Beckett continues her quest to find the stolen toxin as Castle is left with less than a day to live after his exposure.
Beckett must decide whether to take the high profile job in DC and what to say to Castle about his marriage proposal. Both must deal with the consequences of their decisions when they are plunged into a high-stakes investigation. Federal investigator Rachel McCord plays a central role in how Beckett decides what to do about her future.moreless
Castle and Beckett find themselves shut out of a crime scene by Homeland Security. Things get complicated when they discover that the victim, a government whistle-blower, was killed by a military drone's missile.moreless