While the trip down memory lane might have been pleasant for Jack and Rose, it represented pretty much everything The Doctor didn't want to talk about just then. Was he delighted to see them? Absolutely. Even Jack, for everything Jack represented that felt wrong in the universal sense, was a welcome sight. Besides, if The Doctor really was going to get sucked into a parallel reality with bits of magic, where he'd be forced into getting a flat (never mind a job), and stripped of his TARDIS, he was glad they were here.
Truthfully, he was glad all of his traveling companions were here. While he might not have liked the ramifications, it at least meant there was a pretty good chance they'd get to go home. That still didn't make it any easier to hear or have conversations like this one, and The Doctor frankly found himself having far too many of them.
Just like times of old, The Doctor simply excused himself in silence, as he proceeded to move about their apartment, flashing the screwdriver periodically. He was looking for something but, if he were too have been completely honest -- which he rarely was, just mostly -- it was a way to avoid the dialogues he didn't want to have. He didn't want to think about Canary Wharf. He didn't want to think about Satellite 5.
"Well, look at both you two." He offered, stepping in between them as he started looking about for various electronics he could disassamble to build whatever he might need to be productive. "So. Yes. We've now established that this likely was not a transmat beam -- not that I ever really thought it was, too big, spacial dilation, fractured universes, too many people -- but that still doesn't answer the question of how it is we're all here."
The Doctor tapped his finger against his lips and ran a frustrated hand through his hair. Being without his usual resources was frustrating. He could barely tell up from down, and some of the rules were starting to get fuzzy -- and that was never good. Still, it would be good to get them talking about it, get the three of them thinking about it collectively. Besides, it had to be better than thinking about the days they were both torn from his lives.