Since this was a reunion of sorts between old friends (and apparently it was about the Doctor finding himself quite literally), Ianto remained in the background, out of attention's way. It was something he was very good at. Rather like the best butlers. Instead of gaping, like everyone else seemed to be, he quietly pulled out his scanner and held it out towards the blue call box, taking readings on it and comparing them to the ones he took earlier on the ... other blue call box.
Thinking about this too hard made his head ache. Ianto was tempted to post his chemist's bill for the pounds and pounds of aspirin he'd need to both Doctors. They could split the bill. Not Rose, though, she was rather sweet. Ianto made a mental note to fix her tea later; she seemed more poleaxed than Jack looked, at the moment.