[Jamie, for his part, stares at the Doctor in shock, especially at that last statement - but then something like denial kicks in. The Doctor would never do that.]

B-but, that can't be true. Ye couldnae have...

[He shakes his head, refusing to accept what's been said.]

No, I don't believe it. Or that other one, either. You've already traveled with me and Xion. Ye mean to say you'll just leave us behind once we've figured out how to get out of here for good?