"Great!" He's a little out of breath. Scooby Doo starts up again in his pocket. Castle slaps his hip where a cop might keep a gun -- his artillery is a little more mundane -- and tugs his cell phone free.

He holds up a hand, begging for leave and understanding. 'Starts to back out of her apartment.

"You'll get back to me about that case thing, right? Creepier the better, and you know I'm all in?"