Cal nods. He thinks so, too. He and Sherlock have never talked about it before, though, and he wanted the confirmation.

"How's he doing, anyway?"

Cal doesn't see as much of Tony as he used to, and Tony doesn't let much show. Not of that.

(Not unlike Cal himself. There are quite a few people who think Cal doesn't care much about his father's death at all, and that suits him just fine. That kind of thing is private. It's a weakness.)