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.
Agents Beckett and McCord arrive to take over Castle and the guys' investigation into the death of a former child star, creating tension in the precinct.
Beckett races to find a stolen toxin capable of killing thousands of people; Castle has less than 24 hours to live after being exposed to the chemical weapon.
Castle: 'A Deadly Game'
Significant Others - Sneak Peek
Castle: 'Murder Most Fowl' Sneak Peek
Castle: "A Deadly Affair" Sneak Peek
Castle: '3XK' Sneak Peek
Castle - 'TICK, TICK, TICK...'
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.
Beckett confesses to Castle the real reason she hesitated about reserving the venue earlier.
Castle Sneak Peek
Castle sneak peek.
The pieces come together for Beckett to realize who Lazarus is and why she got to survive earlier in the woods. Senator Bracken used to owe her one, but not anymore. Next time they meet, things are going to get real.
Castle - Sneak Peek
Castle sneak peek
Series creator/executive producer Andrew W. Marlowe and director/executive producer Rob Bowman applaud the cast's teamwork and ability to memorize dialogue, with special kudos to Stana Katic (Kate Beckett) and Nathan Fillion (Richard Castle).
Castle: Season Premiere clip
Download the TV Guide app for iPhone, iPad and Android!