Where have you been all my life?

Keep 'em coming pal, you're doing great.

Guilty pleasure or just guilty?

Don't miss me too much. The dog. Not you.

Do you have a case of puppy love, Esposito?

Castle: We could keep him here at the precinct. We could use a mascot.
Espo: I thought that's what we had you for.

Dog Whisperer? Check. People Whisperer? Not so much.

Castle: Your friends name is Buttons Dutton.
Martha: That is unfortunate.

This is politics. Perception is reality. The truth won't matter.

Give him a chance because the moment you make a move on him, his career is over.

Castle: So we can narrow our suspects down to rich men with good taste.
Beckett: You saying you're a suspect?

That's going to be like looking for a needle in a needlestack.

Castle Quotes

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

Beckett

Beckett: (Clears throat) Ahem. What's the deal with men and boobs, anyway?
Castle: Biological. We can't help it.
Beckett: But doesn't it bother you that they're so obviously not real?
Castle: (Pauses) Santa's not real. We still love opening his presents.