"No. No." the Doctor said thoughtfully, considering the question of Jacks, That went nowhere, because Jack was less then certain about it. And if was just me in common, he'd have been more taken with the version back home. It's something else. Not the Vortex thing, either. It's this Jack, himself, I can tell that much. Hmm."
He shrugged. It was a bit of a puzzle, but not really important.
"Do deal with him. I'd really rather not have to, but I will, if I must," he told the other Doctor, with a bit of steel in his voice.