[If Steve knows anything, it's about silently agonizing over a situation. The past; the impending disasters just ahead of them; forgetting things he holds dear. His smile is a quirk of wry humor at hearing Watson tell him he's going to worry.

You can't keep people from worrying, Steve.

How many people would be telling him that right now? And yet, if that's true, he wants to prove them wrong. Too many conquerors have tried to take the world with fear for him to just be willing to accept it.]

Just make sure you don't let it get to you. And wake me up if anything happens.

[Not that he won't wake up anyway--he'll have a hard time sleeping in this room--but it needs saying.]

Lucky I ran into you here. Thanks for sticking around, Doctor.