[ He chuckles. ] I wear a wig because I got a bit bored one night.

[ But, there is a feeling that he can be a tad more open with Fortescue. Not too open. Not enough to expose himself. Just more than most get to see. That old man who has seen far more than he ought to have.

The Doctor looks back at her as they round the corner. ]

It's usually how I end up meeting you lot. Knock around a bit when it's late at night. Find a planet that needs help. Solve a problem and turn around and... there you are. Impossible mysterious human beings. [ There's a sad smile on his face as he says that. ] The ones who truly understand the wonders of the universe and can show an old man how to enjoy it again after everything he's been through.

Beautiful and brilliant human beings. [ He reaches up and taps her nose gently. ] And their cat companions.