I'll come back here, so don't worry about me. I need to nip back to the TARDIS for something, but then I'll be around. I won't go far.

[his expression darkens a bit] But Patricia, there is one thing you ought to know. When I said Frank was different, I meant it. He isn't interested in learning about self-sacrifice like Rowe did. He wants to take over the Earth and use any security measures he can gain knowledge of to do it. He won't be as easy to deal with.