"I'm sure of it," Martha agrees, even though she has some of the same concerns about the Doctor. The two of them had been forced into a more-or-less "normal" life together once, when the Weeping Angels had sent them into the past. Martha had spent a few months working as a shop girl while the Doctor -- well, the Doctor hadn't known what to do with himself.

She's thankful that it had only been a few months, as that had been hard enough with the way that he'd carried on, turning the flat that they'd rented out into his own personal project. The thing is, the Doctor wasn't meant to stay in one place. Martha can only hope that Wonderland will be interesting enough (and change itself often enough) that it won't wear on him too much.

When Clara stands, Martha glances up, drawn right out of her thoughts. "You heading off, then?" She doesn't want to presume too much and ask to come along if Clara wants some time to herself.