(Gilmore grumbles)

IAN: I just feel we should be doing something.

RACHEL: Frankly, I wouldn't advise it, Group Captain. We're in way over our heads.

IAN: You were hired as a Chief Scientific Advisor. One tends to expect advice from ones advisers.

RACHEL: For one thing, Group Captain, I was not hired, I was drafted. And for another, do you think I am enjoying having some space vagrant come along and tell me that the painstaking research I have devoted my life to has been superseded by a bunch of tin-plated pepperpots?

IAN: Steady on, Professor.

RACHEL: Steady on? You drag me down from Cambridge, you quote the Peace Time Emergency Powers Act at me, and then you expect me to advise on something outside the realm of human experience! Bluntly, Group Captain, we're reliant on The Doctor because only The Doctor knows what is going on.