And this day will forever be remembered as the day Iman twisted the Doctor's arm about sheltering an alien child. Not remembered accurately, but remembered nonetheless. And amazingly enough, Callie isn't arguing. See, if she were human, she'd be arguing, even though this is clearly the best course of action. Even better, the TARDIS seems agreeable despite his oversight. Probably helps a lot that these strangers have both been very impressed and polite, and in Callie's case, grateful. He has no idea how to handle Callie's gratitude, and unfortunately there's too much emotional responsibility in the air to just go and fiddle with the console until everybody leaves.

Luckily Iman spares him with her curiosity. And yes, he'd rather assumed she would turn up again, like a stray cat once it's been fed. Pretty understandable, really, she's hit the dimensional physicist jackpot. "This is the TARDIS." He's established that already, but now it's almost an introduction. "A ship that travels in time and space." Only not so much, currently. "I'd give you a demonstration, but there's some compatibility issues with the new universe. Everything else works, though." Mostly. He shrugs. What more could she want to know?