"Undead Again"

A zombie attack on Castle?!? That's the theory that starts to fly on this season four episode.

  • 4.6 / 5.0
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"Headhunters"

It's a Firefly reunion on Castle this week, as Adam Baldwin guest stars in the fun role of Detective Ethan Slaughter.

  • 4.3 / 5.0
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"The Limey"

Brett Tucker guest stars this week as a detective from Scotland Yard. He teams up with Beckett and Castle on a personal case.

  • 4.6 / 5.0
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"47 Seconds"

A bomb goes off during a protest this week, causing Castle and Beckett to go back over the timeline of the event, and also to evaluate their lives.

  • 4.7 / 5.0
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"A Dance with Death"

Castle delves into the world of reality TV this week, as a contestant on "A Night of Dance" is murdered n her dressing room.

  • 4.4 / 5.0
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"Once Upon a Crime"

The detectives look into the deaths of women dressed as fairytale characters while Martha puts on a one woman show.

  • 4.4 / 5.0
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"Linchpin"

This is the conclusion of the annual two-parter. It features Castle and Beckett racing to stop a chain of dangerous events from unfolding.

  • 4.6 / 5.0
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"Pandora"

Castle and Beckett are after a killer this week, which leads them to a major conspiracy. Jennifer Beals guest stars.

  • 4.8 / 5.0
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"The Blue Butterfly"

Told through flashbacks, Castle and the detectives investigate a murder linked to a double homicide in the 1940's.

  • 4.7 / 5.0
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"An Embarrassment of Bitches"

The murder of a dog trainer/judge has Castle and Beckett looking into guest star Hilarie Burton's character, Kay Cappuccio, a character resembling reality star Kim Kardashian.

  • 4.6 / 5.0
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Castle Quotes

I don't get it. He's into you and your determined not to give into these feelings that you clearly have for him. So he fantasizes about you through his writing. It is literally verbal masturbation.

Natalie

I can't tell you how many times I've had dreams of being on this very ship.

Beckett