In the series finale, lives are endangered unexpectedly when Castle and Beckett prepare to take on LokSat.
A psychiatric inmate escapes and drops dead in Castle's PI office, and the investigation that follows has Castle surmising the Antichrist could be involved.
A movie star who transitioned to theater work is killed, so Castle and Becket go behind the scenes to investigate what was going on in the actor's life.
A city inspector cheats death twice when he survives separate poisoning attempts, and a curious Castle and Beckett grow determined to solve this mysterious case.
Hayley helps an old pal, but this favor gets her in trouble, linking her to a murder and a cyber-terror attack. She then needs help herself, so Castle and Beckett attempt to clear her name.moreless
Castle and Beckett embark on a search for Aladdin's lamp after a man linked to smuggling Turkish antiques is killed.
One of Esposito's old cases is reexamined by Castle and Beckett because of a clue left at a crime scene involving an armored-car driver's murder.
The team head to the NYPD Academy for an investigation involving a murdered recruit. Meanwhile, Castle grapples with a decision with far-reaching ramifications for himself and Beckett.
Castle returns to Los Angeles in search of info about the missing time related to his abduction, and while he's there, the Greatest Detective Society reaches out to him and asks for his assistance in solving a murder.moreless
A student learning to speak English is killed and his classmates keep mum when questioned by police, so Castle goes undercover to gain info on the victim by enrolling in the class as a French Canadian immigrant.moreless
Castle gets abducted and must solve puzzles and mind games with a group of strangers. Meanwhile, Beckett and her colleagues race against the clock to find Castle and capture a killer.
An entertainer on a cruise ship is killed, and Castle and Beckett investigate while trapped on the ship with the murderer.
A seductive con man is killed, and the investigation has Castle and Beckett questioning New York City's upper crust. Meanwhile, Castle has a surprise in store for his and Beckett's one-year anniversary as husband and wife.moreless
Det. Slaughter returns seeking Castle's help in a robbery case. However, Slaughter becomes a suspect when the heist case turns into a murder case, and Castle's unsure about whether his pal is innocent or guilty.moreless
An art thief steals a rare painting and kills the person transporting it, so Castle and Beckett team up with the key witness in order to find the culprit.
In the conclusion of the eighth-season opener, Beckett's disappearance is examined from her angle as she fights to stay alive and uncover who wants to see her demise.
Since passing her Captain's exam and the offer to run for State Senate, Beckett and Castle are adjusting to her career change. A call from a mysterious stranger sets off an unpredictable chain of events.moreless
Larry finds out he's pregnant, and must decide whether to stay on Earth or return to Zabvron. Meanwhile, Reggie mulls becoming a human while and the neighborhood gets two new visitors.
Larry's handsome brother, DJ Jazzy Jeff, shows up for a visit and claims it's strictly social, but he's actually in cahoots with their father to bring the entire community back to Zabvron. Meanwhile, Amber confides in Debbie about her college boyfriend.moreless
Marty and Debbie love Friday night bowling but Marty is tasked with kicking her off the team when she proves to be a terrible bowler. Larry's brother arrives to challenge him after word gets back to home base that the alien colony is becoming too Americanized.moreless
The Weavers, along with Larry and Jackie, head to San Diego to meet with Debbie's estranged mother and meet her newly adopted ten year old son. Marty does his best to get Abby over her fear of the ocean.moreless
Feeling they're stuck in a rut, Marty plans a date night, but it's nothing like Debbie imagined. Dick is wildly enamored with the new babysitter.
Despite pleas from Marty and Debbie, Larry decides to attend his Indian co-worker's traditional Indian wedding. Larry and Jackie get swept up in the event looking for a wedding gift after Larry's research concludes that these types of wedding take place in "Bollywood".moreless
Reconnecting via social media with old friends from Bayonne reminds Debbie of how much they've lost touch, so the Weavers decide to throw an Oscar party and invite everyone from the old neighborhood. When the Bird-Kirsees get wind of the party, they decide to turn the house into an extravagant over-the-top Oscar party.moreless
Debbie finds herself acting like a "mom" when her college study group meets at her home. Larry undergoes jealousy for the first time. Amber and Reggie make a key determination concerning their relationship.moreless
Leaving Marty at home with Amber as she grieves over her relationship with Reggie, Debbie heads back to school. With Larry and Reggie's synced male cycles and Dick experiencing the terrible tens, the Bird-Kersee men are emotional wrecks.moreless
Marty and Debbie are thrilled that their 25th high school reunion is approaching. Debbie can brag about her move to Hidden Hills but knows she'll have to see her archenemy Tina. Marty's high school band has been asked to perform, but his moment of glory is soon turned upside down.moreless
The Bird-Kersee's decide to build a panic room after they are mugged, of course they've chosen Marty and Debbie's bedroom as the place to build it. Jane's intrusion into Amber and Reggie's date night forces Reggie to decide which girl he wants to be with.moreless
Debbie inadvertently ruins Larry's surprise Christmas gift for Dick, so he goes over the top with gifts for the Weaver kids. Reggie and Amber labor to come up with the perfect gift for each other.moreless
While a water pipe break brings Marty and Debbie closer to Mother Joyner and Father Kersee, it causes a riff between Jackie and her parents. Larry is determined to find a job and prove he can support his family.moreless