We go behind the music on this episode of Castle. It looks like an especially fun one.
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Beckett and Castle interview a science fiction actor in this fun clip from "The Final Frontier." He takes his role very seriously.
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Beckett has a Nebula 9 outfit?!? Castle learns a major secret about his partner/lover in this fun clip.
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Castle and Beckett interrogate a weapons expert in this "Final Frontier" clip. A fake weapons expert, that is.
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Castle and Beckett question a sci-fi actress in this clip from Castle. It looks like Kate knows a great deal about her.
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Castle invades a sci-fi convention this week. But it isn't all fun and games. There's a dead body on hand.
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Prepare yourself for a spoiler-filled sneak peek, Castle fans. Watch this clip and be stunned at who gets cuffed.
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Castle is set up as the main murder suspect on "Probably Cause." Watch the official ABC promo now.
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Ryan and Espo are on to Beckett in this Castle sneak peek. They know she has a boyfriend, and they are all about learning his identity!
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Castle gets it from his mother and his daughter in this great clip. They both have a lot of advice concerning a vacation with Beckett.
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Someone forgot her bathing suit! Watch this sexy clip from Castle now.
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Beckett and Castle plan a weekend away on this episode of the ABC series. But, as you can see here, a dead body gets in the way.
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Castle Quotes

Sometimes the hardest things in life are the things most worth doing.

Castle

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