Kate Beckett can make anything look sexy, even a police uniform but not even she can look good in a space suit.
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An astronaut is murdered in a Mars simulator. This one has to end up in one of Castle's books. It's simply too good not to use.
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Castle and Beckett don spacesuits and enter a Mars simulation to figure out how an astronaut ended up dead on Castle. "The Wrong Stuff" is the 16th episode of the show's seventh season.
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We really hope that this is the last time Castle and Beckett will have to face off against 3XK.
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Can Castle and Beckett find a way to take down 3XK even though he's stolen all of the evidence they previously had against him?
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And before you know it Rick Castle's arch nemesis is back and it appears he's enjoying egging Castle and Beckett on once again.
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When clues to a murder point back to an old case, Castle finds himself back at the 12th precinct to consult.
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At least it looks as though Rick and Kate are working the case together, despite Castle being banned from the precinct.
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Castle Quotes

I can't help it if you got off by putting things in my mouth.

Beckett

Castle: They're going to kill you Kate, and if you don't care about that, please think about how that's going to affect the people who love you. You really want to put your dad through that? What about Josh?
Beckett: And what about you Rick?
Castle: Well of course I don't want anything to happen to you. I'm your partner, I'm your friend.
Beckett: Is that what we are?
Castle: You know what? I don't know what we are. We kiss and then we never talk about it. We nearly die frozen in each others arms, but we never talk about it. So no, I got no clue what we are. I know I don't want to see you throw your life away.