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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Rick finds trouble when he's bored and stuck at home on Castle. "The Lives of Others" is the 19th episode of the show's fifth season.
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Castle Quotes

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

Castle

Rick Castle: Checking you for bites and scratches. Just making sure you didn’t somehow get impregnated.
Kate Beckett: If you think that’s how I’d get pregnant we need to talk.