Everyone associated with Beckett's mother's case is dead. Castle confronts his partner with that fact in this third season finale clip.
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Season three of Castle comes to an end with this episode. Titled "Knockout," it focuses on Beckett's mother's murder.
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A promo for the upcoming beauty pageant-themed episode of Castle, "Pretty Dead." Who murdered Miss Illinois!?
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Get an amazing sneak peak of the upcoming Castle episode, "The Dead Pool," with commentary by Nathan Fillion.
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This is a clip from the Castle episode "Slide of Death." In it, Castle asks for a favor regarding his daughter.
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Castle learns about life as a teenage girl in this clip from "Slice of Death." It's hard being the father of a teenage girl, too.
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Castle and Beckett dish on deep dish in this scene from "Slice of Death." They then turn their focus to a dead body in the oven.
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Ready for a deep dish murder? That's how this preview for "Slice of Death" teases the next new Castle episode.
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A juror is killed on the episode "Law & Murder." How big of a deal is this? It leads to an appearance by the district attorney.
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Castle questions his daughter in this sneak peek. It's courtesy of the episode "Law & Murder."
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This is our second sneak peek at "Law & Murder." In it, Castle and Beckett debate the former's parenting strategy.
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Beckett fills Castle in on this week's victim, prompting him to call "dibs" on the unusual story. He finds an aspect of the case to be "fantastic."
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Castle Season 3 Quotes

Castle: How do you know when you're in love?
Beckett: All the songs make sense.

He really is ruggedly handsome.

Ryan (looking at cutout of Castle)