Kate has taken one wrong step. As a result, she's now standing on an explosive.
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He's a Writer. She's a member of the Police. Together, they are the most entertaining couple on TV.
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Do not move, Kate Beckett. This is a very dangerous situation because the detective has stepped on an explosive.
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A member of the bomb squad takes stock of the situation in this still from "Still." Beckett has stepped on an explosive.
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DO NOT MOVE, KATE! The detective has stepped on a bomb in this scene from "Still."
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Castle tries to calm Beckett in this scene and for good reason: she has stepped on a bomb.
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Castle leans back and flashes that Castle-like smirk in this photo. It's from the episode "Still."
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Castle looks into a crime scene in this shot from the Season 5 episode, "The Fast and the Furriest."
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Castle Quotes

Rick Castle: That thing in the shower. That is delightful.
Kate Beckett: That is not a routine. That's two naked people singing when there's no one around to see or hear it.

Button up kitten because we're going home.

Beckett