"I know you are... It's just, different, I suppose." She glanced over at him. "So many questions I want to ask you, but I know I shouldn't. Or can't. Because you wouldn't be able to answer them. Spoilers, and all that." The biggest one being about his new companions and if she was still around at that point. But, from her Doctor, she knew he wouldn't be able to answer any of those questions.

"Well, she has put up with you for the longest. Can't run away from you, can she, spaceman?"