As the TARDIS took them away, the Doctor was quickly at Bill's side again. "Are you strong enough to walk?" His external body might've looked old, but he was much stronger than he looked, with a fit Gallifreyan physiology - if it was necessary, he would carry her. "I'm not that kind of Doctor, but I know enough to care for you, the TARDIS can help with the rest." Unfortuntely, he really didn't know anybody else who he could call upon at the moment. Damn it, he wished Martha was here.
"That's a good idea," he told her. "But he was pretty busy when we left him. I'm guessing he'll be busy for a while. Are you dizzy? Feeling ill?"