Ianto blanched, clutching the door frame as they turned the corner sharply. He had absolutely no idea where they were going, so he hoped that the other boy did, because that was yet another thing that he didn't want to have to experience, being lost in a foreign world with absolutely no way of getting home save for the kid who'd gotten him lost in the first place, so.

But then there was an alien and Ianto's mind was solely focused on that. "...oh my god," Ianto said, trying to hard not to stare open-mouthedly. "...they're blue."