"They seemed alright enough," he answers with a shrug, fiddling with controls again, not really doing anything in particular with them. He's not exactly comfortable with copies himself either, and doesn't really blame the TARDIS for her opinion.

"But when I get back, I'll probably use the telepathic circuits to rid myself of the most troublesome knowledge I acquire here." He realises that there are some things he just shouldn't know. The important thing is to avoid any information that might convince him to change his mind and want to keep the memories.

"They might like to visit, once they know you're here," he points out after a few moments, wanting to know how she'd feel about that. Not that he's planning on inviting either of them to stay.