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
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 investigate the death of a mean high school girl at one of Castle's alma maters. Castle is thrilled when he discovers that it might be the work of a teenage telekinetic.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.
The murder investigation of a video store clerk, who's also a high level hacker, leads Beckett and Castle straight to the mysterious Jackson Hunt.
Castle and Becket search for a serial arsonist turned murderer after they find that the dead body in a building fire was in fact shot to death. Jenny goes into labor but Ryan's put in some danger that could ruin the moment.moreless
Beckett and Castle are tasked with solving the murder of man who handed a baby over to a priest just before he died. While playing nanny to the lost child, they must figure out who killed the man, how did he come to have the baby, who isn't related to him, and where are the rightful parents.moreless
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 and Beckett help Alexis with an Innocence Review case. With only 72 hours until his execution, their goal is to prove that the death row inmate was wrongly convicted. But, some of what they uncover may only strengthen the case against him.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
Beckett has an interview with a federal law enforcement agency which compels her to reassess her job and her relationship with Castle. The latest case involves skid row and turns up many peculiar things about the death of a young woman found inside a water tank there.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
While the team looks for a way to disarm the bomb that Beckett has stepped on, Castle diverts her attention by engaging in an argument about who fell for whom first.
Castle's jealousy surfaces when Beckett is assigned as private protection for charming billionaire Erik Vaughn.
Primate research, big game hunting and Bigfoot all play into the investigation, when Castle and Beckett hunt for a murderer who left giant footprints at the scene.
Castle's stuck in the loft with a broken leg as Beckett investigates an IRS agent's death. Bored and unhappy, Castle spends his time looking out the window where he thinks he's seen a young woman murdered.moreless
Castle and Beckett investigate the discovery of a man found dead in an industrial cake mixer and a link to an Irish Staten Island gang and bar owner, Siobhan O'Doul. Surprising everyone is that Ryan has a history with Siobhan from when he worked undercover in narcotics. With no leads and the case threatening to go cold, Ryan goes back undercover to help find the killer.moreless
A "haunted" video seems to have scared a young woman to death and now Castle is convinced he's next after inadvertently watching the cursed video.
When Castle takes matters into his own hands, after the FBI fail to get Alexis back, he discovers that the kidnapping may be part of something more ominous.
While investigating a murder, Castle and Beckett find a link to a kidnapping plot. FBI Agent Harris is called in to help find the kidnappers.
Castle and Beckett's latest case involves the murder of a rising star. Things don't go as planned when Castle tries to give Beckett a Valentine's Day gift.
Complications ensue when Castle and Beckett finally try to take Senator Bracken down after finding evidence connecting him to a young woman's murder.