Dr who second doctor quotes The Wheel in Space

The Doctor: Logic, my dear Zoe, merely enables one to be wrong with authority.

The Doctor: I suppose you've come for me?

Cyberman 1: You know our ways.

The Doctor: Yes, I hoped you realised somebody did. I imagine you have orders to destroy me?

Cyberman 1: Yes.

The Doctor: Tell me one thing, why did you order Duggan to destroy radio communication with the Earth? After all, that is why you want possession of the wheel, isn't it?

Cyberman 1: You know our ways.

The Doctor: That doesn't answer my question.

Cyberman 2: He was instructed to destroy only the transmitting complex.

The Doctor: Oh, I see, how interesting, yes, of course. And presumably your large space-ship holds your invasion fleet, and the smaller ships can only enter the planet's atmosphere by homing on a radio beam.

Cyberman 1: You know our ways. You must be destroyed.

The Doctor: Yes, I was afraid you'd get back to that.