The Doctor is pretty well ambushed by this sudden tidal wave of scientific enthusiasm, and looks accordingly offended. He accepts her handshake nonetheless, albeit with obvious reluctance and without any commitment to further greeting rituals, he's already more than done his part, thank you. What question in all that should he even answer? But at least she's being lively now, instead of potentially sinister, scientific enthusiasm does a lot for his opinion of anybody. "Yeah, okay. Dimensional physicist, that's good. I like dimensions. Yes, the dream bubbles," great, now he's doing it too, "are what led me to seek out the rift in the first place. Though I had someone on the inside." The rift doesn't get a capital letter from him yet. Maybe later.

This is all very interesting, and he is definitely already intending to help himself to any research she might have, but currently she is distracting from an important realisation that he is still trying to have. Not for the first time, he wishes it were possible to mute or pause people. He does the next best thing, which is to put up his hand almost in a 'Stop' gesture and then draw all the fingers together to a point. That's Iman's volume, it's down now. "Now shush," he shushes, before turning to Callie and bending down to stare at her not-green face. Not-black eyes. Here, in Manhattan. He grins like someone very out of practice at it. "You think you're in another dream bubble," hang on, that's not the realisation. Abruptly he wheels and makes a dash for the TARDIS door, and thence the upper level of the interior, taking the steps an ill-advised number at a time and leaving the door open behind him. From inside, rummaging sounds can be heard. "Come on!"