It's the Bachelor meets Homeland.

Kate Beckett: I'll give it to you straight. I'm just a girl, looking for a private dick.
Rick Castle: Whoa, then your search is over, sweetheart.

Castle, nothing you do is little.

Ryan

Kate: Look I signed up for this when I put that badge on. You didn't. It's not your fight.
Rick: The hell it isn't. I don't run around you just to annoy you, I don't write up murder scenes in the middle of the night to satisfy some morbid curiosity. If that's all this was I would have quit a long time ago.
Kate: Then why do you keep coming back Rick?

You know as well as I do that when the lights go out, bad things happen.

Beckett

Esposito: Alright, hurry up. Let's just get this over with.
Sonia: Didn't I used to say that to you whenever you got frisky at night?

Gary: You're going to break my finger.
Beckett: And after that there's nine more.

The problem is neither of us are in love.

We are not serving them coffee. You bought this espresso machine for the NYPD. This is NYPD coffee only.

Esposito

Beckett:A felon who wants to be a lock smith what could go wrong there?
Jessop:You know you don't have to be mean.
Castle:Ya wow.

Two weeks ago, I saved your life twice.

If you're so interested in what I'm doing, maybe you should ask your phone. I'm sure there's an app for that.

Alexis

Castle Quotes

Castle: How do you know when you're in love?
Beckett: All the songs make sense.

That ain't ketchup.

Ryan