Castle and Beckett's long-awaited wedding is almost here, but when a shocking surprise threatens to ruin the big day, they are sent on a wild mission filled with masked men, angry bikers and a charming ne'er-do-well from Beckett's past.
An investigation conducted by Beckett related to her mother's murder goes awry when a man she has been surveying is killed. When evidence links Beckett to the victim, she and Castle become the targets of a manhunt that puts both of them in grave danger.
When an up-and-coming professional skateboarder is gunned down by a mysterious motorcyclist, Castle and Beckett are thrust into the world of extreme sports, where the death defying stunts aren't the only thing that's dangerous.
When construction workers find the body of an infamous New York mobster who disappeared in the seventies, Beckett and Castle try to solve this three decade-old Mafia hit.
An investigation into the murder of a Wall Street trader takes a shocking turn when Castle and Beckett discover Gates' estranged sister is involved.
When Castle and Beckett investigate the mysterious murder of a Japanese ballet dancer, they end up being targeted by a ninja assassin.
Beckett is asked to assist with a narcotics investigation; when a routine undercover operation goes awry, Beckett is faced with dangerous men from the New York underworld.
A guilt-ridden woman confesses to a murder, but contradictory evidence and a second confession complicate the case.
The murder of a high school mean girl points to a teenage telekinetic.
Castle and Beckett are thrust into the world of high fashion.
When a pop star is found dead in an alley, Beckett and Castle look into her hard-partying lifestyle; a shocking revelation rocks the investigation.
The murder of a video store clerk with a secret history leads the team to Castle's father.
Castle and Beckett suspect a serial arsonist of murder; Jenny goes into labor.
A dying man leaves a baby with a priest; Castle and Beckett end up taking care of the baby while they investigate.
When a woman who looks very similar to Lanie is murdered, the team thinks the killer may be targeting members of the 12th precinct.
A well-known relationship therapist is murdered.
Significant Others - Sneak Peek
Castle: "A Deadly Affair" Sneak Peek
Castle - 'TICK, TICK, TICK...'
Watch a sneak peek of the season premiere.
Castle, Ryan and Esposito end up in a precarious situation trying to pick up some information.
He's not in the car! Beckett rushes to the fiery car crash where Castle could be trapped or worse. Beckett approaches the wreckage in horror and despair. Then... Castle isn't in the car!
Series creator/executive producer Andrew W. Marlowe says that season three has been about secrets. Cast member Nathan Fillion (Richard Castle) says that his "Firefly" co-star Adam Baldwin will guest star as Detective Slaughter later this season.
Beckett confesses to Castle the real reason she hesitated about reserving the venue earlier.
Castle Sneak Peek
Castle sneak peek.
Transporting a priceless diamond puts Ryan and Esposito in serious danger.
Cast member Tamala Jones (Lanie Parish) compares kissing Jon Huertas (Javier Esposito) to kissing Nathan Fillion (Richard Castle). Susan Sullivan (Martha Rodgers) says that her real-life mother was an inspiration for her character.
Castle and Beckett share a tender moment after he wakes from a near death experience.
Download the TV Guide app for iPhone, iPad and Android!