Beckett: I'm not choosing our song off of a list that includes Def Leppard's "Pour Some Sugar on Me"
Castle: That song, I'm sure ignited many a strip club romance back in 1987.

Castle: Does it say we're getting married in space?
Beckett: No, it's not going to happen babe.

And if they are going to write about you I want it to be the truth. I want it to be about us.

He's a nut job but he's probably not our killer.

Beckett: So you weren't gazing loving into her eyes?
Castle: She had spinach in her teeth.

Castle: How about we have a winter wedding?
Beckett: Didn't we say we wanted to do it outside?
Castle: Oh, right. Frostbite isn't very festive.

Ryan: Rather than pick a name for my kid you should pick a date for your wedding.
Castle: Pick a date for my wedding? I was planning on bringing her.
Beckett: Really. When is that? I might have plans.

Beckett: Is there any evidence of the baby in the footage.
Ryan: No, only three men and a Mustang.

I'm suddenly getting a clear and frightening visual of what my future will look like.

Castle: When we do this, let's not do the dead body in the middle of the aisle.
Beckett: OK. Good call.

Beckett: So you guys dress up for Thanksgiving?
Castle: Doesn't everybody?
Beckett: No, I think that's pretty special to you.

Don't chase ghosts, Castle. It's not worth it. Trust me.

Castle Quotes

Castle: The fact that you even think that breaks my heart. I would walk into a tornado for you, Kate.
Beckett: And I would die if I lost you.

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