He sighs. "Look, you're worried. I'm worried too. The best we can do is not let him see that, okay?"

It's almost impossible to stop from launching into his 'stop Charlie from doing something stupid' voice, but he does his best to temper it, make it a little more understanding and a little less demanding. Charlie doesn't always respond well to demanding; sometimes it just makes him more stubborn.

"It'll be fine."

He doesn't know that, and he's never been an optimist. Even saying that rings false, somehow, but he makes an effort.