Ghosts
Season 1, Episode 8
[talking about a poker game]
Judge: [to Beckett] Do us a favor. Beat his pants off.
Castle: Yes, beat my pants off if you dare.
[talking about a poker game]
Beckett: I'm gonna make you hurt.
Castle: Oh, you're gonna get hurt.
Beckett: What are we playing for?
Castle: Pride...or clothing.
Beckett: I think I have a bag of gummy bears in my desk...
{Sorry that it's so short. This is the hardest one to find quotes for.}