It is actually really good to see Joan getting to sink her teeth into something again. He knows working on Rupert's case probably isn't exactly fun, but it seems like it's rewarding. It's good to have that kind of intellectual stimulation, and there hasn't been a lot of opportunity for it lately.

He opens the door and thanks the delivery guy, and lets Sherlock carry the box to the kitchen.

"Alright, I'll handle this, you guys keep doing what you're doing," he says, shooing Sherlock back out of the kitchen and giving Joan a smile.