Joan blinked and raised her eyebrows at that look. It made sense for him to be wary of her too, of course, but he was apparently looking to Sherlock and John to get their opinions of her, so she was sure he would likely come to be okay with her at least as much as she was with him.

When Sherlock mentioned bomb building materials, she blinked again, this time in surprise, shifting her glance to him.