He's an identical twin who wears glasses. That's the worst disguise since Clark Kent.

You would have liked my grandfather. in fact you remind me of him a little.

Beckett

You had your hand in my pocket and I didn't even feel it? Do it again!

How do you like my naval ring?

Beckett

You want my advice? Never sleep with someone you work with.

I don't get it. He's into you and your determined not to give into these feelings that you clearly have for him. So he fantasizes about you through his writing. It is literally verbal masturbation.

Natalie

Thats what makes Beckett such a great detective. She invests in the victim.

She took my coffee, Castle!

Beckett

Beckett: What kind of an idiot would pay six grand for a bag?
Natalie: I have the whole set.

Pick it up, Dad, a murder will make you feel better.

Alexis

Your books are not exactly Shakespeare.

Martha [to Castle]

Did I say cool? Make that awesome. Perfect place for a murder.

Castle Season 3 Quotes

He really is ruggedly handsome.

Ryan (looking at cutout of Castle)

Ryan: (drops egg off desk)
Beckett: Are you guys reenacting the "Humpty Dumpty crime scene?"