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.
Alexis asks Castle for help proving a death row inmate's innocence 72 hours before his execution, but they uncover a secret that could seal the man's fate.
As Castle and Beckett investigate the ritualistic murder of a young woman, they find strange symbols in the victim's apartment; Castle struggles with Alexis' decision to move in with Pi.
A murder suspect claims he has traveled back in time to prevent terrible events from unfolding.
A desperate murder suspect insists on negotiating with Castle.
Significant Others - Sneak Peek
Castle: 'Murder Most Fowl' Sneak Peek
Castle: 'Knockdown' Sneak Peek
Moderator and TV host Tom Bergeron and series creator/executive producer Andrew W. Marlowe comment on the marketing tactic of publishing a Richard Castle novel, "Heat Wave," in real life.
A fan asks if Lanie Parish (played by Tamala Jones) and Javier Esposito (played by Jon Huertas) will ever get together. Moderator and TV host Tom Bergeron asks if we'll ever meet Chet, boyfriend of Susan Sullivan's character (Martha Rodgers).
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.
It's the 1970s at the precinct!
Castle: 'A Deadly Game'
Castle - 'TICK, TICK, TICK...'
Cast member Molly Quinn (Alexis Castle) talks about her TV dad Nathan Fillion (Richard Castle). Series creator/executive producer Andrew W. Marlowe and director/executive producer Rob Bowman talk about creating a show with compelling characters.
Castle sneak peek.
Nikki Heat: Sneak Peek
Thanks to a little encouragement from Beckett, Alexis asks to come home.
Fans ask cast member Nathan Fillion (Richard Castle) about fun moments on the set and what it's like working with different directors like Joss Whedon. Susan Sullivan (Martha Rodgers) says this set is more relaxed than other shows she's been on.
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