A case involving an insurance agent brings Castle and Beckett, who are still on the outs after he looked into her mom's case, back together
Two murder victims are found prompting Castle and Beckett to bet against Esposito and Ryan to see who solves their case first
Castle and Beckett get an inside look at the cutthroat world of the New York fashion industry when they investigate the brutal murder of a young model during Fashion Week
When an Arctic explorer is killed during a polar expedition, the mysterious circumstances of his death take Castle and Beckett from the penthouses of Park Avenue to the halls of the CIA. But Castle's delight at the case's many twists and turns soon turns to frustration as he realizes that their elusive killer might just be fooling them all
Illegal Czech immigrant Eliska Sokel's corpse is found hidden in a sewer, two days after her death. Her also-illegal ex, Teodor Hajek, explains she left him after their son died from a congenital disease. She had worked on the concierge staff of a luxury residence but was fired after Dr. Cameron Talbot's wife questioned the appropriateness of her treating their son Zane to a lollipop. Castle wonders how Beckett will take his dedication of a book starring her alter-ego, and his agent Haas's offer of a contract to write 3 British spy novels. They still solve the case after unearthing an old, tragic secret
A case near Halloween has Castle and Beckett investigating the death of a man in a graveyard, wearing fangs
A singer is found dead, hanging upside down on a fire escape. Ultimately, it's Alexis who helps solve the case
A bike messenger gets hit by a car and his carrier bag stolen. The bag contained evidence pertaining to an old case that Montgomery worked on
Highly respected A.D.A. Jack Buckley, a tough crime-fighter, was murdered. His ex-brother-in-law Paul Cho, a businessman who likes call girls, was blackmailed by Danton to tell Buckley to back off. Castle and Beckett discover it's all about the discreet cyber-prostitution business, which happens to employ Buckley's legal protégée, Scarlett Price. Working out who took over the 'Danton' franchise when founder Dan Tonelli is jailed, leads to some surprising revelations. Meanwhile, 'cool dad' Castle worries about what secret Alexis shares only with Beckett
A man leading a double life is found dead in a garbage chute
When an art dealer is gunned down in his gallery, Castle & Beckett discover that a bullet is inexplicably missing from the crime scene. The mystery is deepened by an amnesiac who witnessed the crime but can't remember what he saw or even who he is
A death of a bridesmaid reunites Castle with his long lost love
While investigating the death of an Irish mobster, Beckett and Castle uncover a local turf war that may be connected to both a late-night infomercial guru and an international drug smuggling operation. But the case turns agonizingly personal when evidence emerges that the killer they're chasing may have had a hand in Beckett's mother's murder
Mysteries abound when a family returns from vacation to discover a dead man in their daughter's bed. Thinking they're investigating the murder of a squatter, Castle and Beckett soon find themselves unraveling a multi-million dollar heist. Meanwhile, Castle tries to keep Beckett from finding out that they've been romantically linked when he's featured as one of New York's 10 most eligible bachelors
A baseball player is found dead in Spanish Harlem. It's found that he had many people hating him because he went to Cuba and shook hands with Castro
A naked woman is found bound and hanging from monkey bars. Castle and Beckett look into the world of dominatrix
In a two-part storyline, Federal Agent Jordan Shaw, an insightful and accomplished Federal investigator, teams up with Castle & Beckett to hunt down a cunning and elusive serial killer
The serial killer remains at large and is taunting Castle, Beckett and Jordan Shaw to catch him
The investigation into the shocking death of a museum curator, crushed by a falling gargoyle, takes a bizarre turn when Castle and Beckett learn that he isn't the first member of a recent archeological expedition to die. It turns out there was a legend inscribed over the burial chamber the team unearthed warning that "all who gaze upon the face of the mummy are doomed." Was the curator just the latest victim of "The Mummy's Curse"? And if so, what does that mean for Castle, who snuck a peek at the mummy when no one was looking?
When a talk show host tells Castle someone wants him dead and dies the next day, Castle asks Lanie to prove his death was a homicide
When an ex-con is tortured to death, Castle and Beckett reveal a shocking connection between a suspect and Esposito's former partner, who presumably died
The death of a popular chef reunites Beckett with her high school best friend who owns the restaurant the chef worked at
Beckett asks Demming to join their robbery-homicide case causing Castle to want to solve the case first
Nothing is as it seems when Castle and Beckett investigate what appears to be the assassination of an intelligence operative. Meanwhile, Beckett's romance with Demming threatens her relationship with Castle, forcing them to confront their feelings for each other