Castle puts the events of the last couple of days on rapid-fire replay in his brain, from the carousel to the parking garage. Yeah, it's true that you'd have to be pretty dense to miss the obvious tension between Beckett and Special Agent Shaw, but Castle had assumed that was a jurisdictional thing. Local cops always hated the Feds nosing in on their territory. Hell, either that, or Beckett just resented the fact that Shaw'd turned up with more gadgets than a Sharper Image.

Now he's not so sure.

"Are you jealous?" He's fishing here. His arm comes up over the back of the sofa.