Rose jumped out of the way of the doors as the man she suspected was the Doctor, because let's be honest, his pinstripe suit and red converse led her to believe he had a waky fashion sense before his leather and big ears version that she knew best, started rambling about a 'Master' and how catastrophic mess it would have been should the figure escape. She then had a look of concern as he looked at her as if he didn't recognize her. Again it could have been centuries for him. She had no idea what he went through and what he would have retained. "Yeah. I know you. 'M Rose. Rose Tyler. I was your companion before this universe took me from you. Could you have....regenerated again?" She questions for she had never been told what he had looked like before she had met him.

And really she didn't exactly ask even with the whole Sarah Jane Smith debacle. Apparently that companion had also been there for his regeneration a long time ago. And Rose knew that The Doctor didn't like to talk about his past before the Time War so she hadn't pushed. Besides she had Mickey her sort of boyfriend as a buffer between them which he put there. The git. He couldn't understand that she really did choose him and she had meant the answer she had given him 'forever' to his question of how long she was going to stay.