"Nope," said the Doctor cheerfully. "I don't have any blood samples. I don't have any medical equipment - well, yes, I do, but I don't know where it is. New TARDIS, you know," and he rambled on, grinning, "bit exciting. Haven't finished exploring, yet. Anyway, when people are busy trying to kill you because they think you're a monster, you don't really have time to do medical tests." After pausing briefly for a breath of air, he added, "Hello, everyone. In case you didn't hear before, I'm the Doctor. Nice to meet you, Urd, Sara, Zim... mad scientist fellow." Yeah... he was just going to try and ignore the little green bloke entirely. He doubted it would work well, or for very long, but it was at least worth a shot.

He nodded, listening to Urd thoughtfully; there was a thought that had crossed his mind a few times. "Well, if the fog is magic, then there's got to be a way to dispel it. Curses always have a counter of some kind." Sleeping Beauty had the kiss, the long-lost High One of Cheem had - what was it, a certain type of intergalactic bumblebee? Either way, it worked. Turning his chaotic train of thought back to the subject at hand, he kept on, grinning. "And if it's science, well... there's always a way to deal with that."