"It's a..." He looks over his shoulder as she walks around him. "metaphor. You've got me confused. Shaken up. Bewitched, bothered, and bewildered."

When she seems to lose interest in him (should he be feeling disappointed? He does, a bit) he follows her stare, wondering what she's looking at. It doesn't seem like she's looking at anything in particular, so his gaze falls back on her instead.

"This is dream space. I don't..." He's about to say that he doesn't know who her 'thief' is, but if this is the TARDIS, there's a good chance he can guess who she's asking after. " Do you mean the Doctor?"