It may have begun with murder but Kate Beckett had a back story and Richard Castle was intrigued. As Castle said, "The point is, there's always a story. You just have to find it." From the moment he profiled Detective Kate Beckett while they read fan letters from his crazy fans, we were hooked. Beckett looked shocked and a little mortified by how close he got to her story. To his credit, Castle looked chagrined that his attempts at guessing her history seemed to cause her pain. For fans, it was the start of a complex and provocative relationship of which we could never get enough.
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In the Castle season 1 finale, "A Death in the Family" Kate Beckett is devastated when Castle does the one thing she asked him not to do, look into her mother's murder.
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Alexis attends her first prom in this episode. That's enough to make any father cry.
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Castle isn't always solving crimes. Sometimes, he just hangs out at home.
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Beckett and Castle look nice and fancy in this scene from Castle. Look out, bad guys!
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Just kiss her already! Many Castle fans wanna see the show's main characters hook up.
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Not to worry, Castle and Beckett are on the case! This is typically a bad thing for bad guys.
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Beckett comforts a little girl in this scene from "Hell Hath No Fury." The episode takes her and Castle into the world of politics.
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Kate Beckett has her hands full with Castle. And with various suspects.
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Rick Castle is very much a ladies man. It's easy to see why, isn't it?
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Rick Castle has never solved a crime before. But his people skills ought to help him get to the bottom of things.
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Castle is called in to help the NYPD because someone is copying killings from his novel. Here, detective Beckett takes a close look at a crime scene.
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Castle Season 1 Quotes

This isn't one of your books, Castle!

Kate

Kate: Are you here to annoy me?
Castle: I'm here for the story.