[she gapes at him. even with all the shocking information she's received so far, that's still impressive] That's what he's after!? He just wants to see how the police might react? Fantastic!

[so, unlike Rowe, there's little chance of talking him down from his course of action. she's at least relieved that the Doctor's desire to bring other people in implies that he won't try to pull a self-sacrifice switch when he gets there, but she does wonder if he really has this plan worked out]

Then good job I know people who are good at dealing with stuff like that.