The tension -- or whatever it is -- remains, but Castle finds that he can watch her tie a scarf around her neck without immediately referencing the way it felt to have her collarbone beneath his fingertips. He wheels his coat up and over his shoulders, dropping the heavy wool over his back.

"I still can't believe I got you to drop out in the middle of doing paperwork," he says, glancing at her while he works his scarf up over his collar, "I'm going to have so much to put in my diary tonight."