There was a look of plain confusion for a moment, before it shifted into a slight blush accompanied by a smile that did betray some vanity. Handsome, huh? Well, he could see that. Of course, Jack flirted all the time, but in this situation the compliment had still managed to catch the Doctor off-guard.

Which made him actually think about it and that finally just led to him chuckling with a slight shake of his head. "Oh, great idea. Let's just nab over to the console room and get right to it, shall we? There's something bound to wake him."