Castle: "Alexis, I don't want to say 'You have some explaining to do', but I think you have some explaining to do."
Alexis: "Wait, did I forget to tell you I've been working P.I. cases for you?"
Castle: "Must have slipped your mind."
Alexis: "Hey, didn't the guys do a fantastic job remodeling the place?"
Castle: "I know, right? ... But you're changing the subject."