DOCTOR: Every great decision creates ripples, like a huge boulder dropped in a lake. The ripples merge and rebound off the banks in unforeseeable ways. The heavier the decision, the larger the waves, the more uncertain the consequences.

DOCTOR: You can always judge a man by the quality of his enemies.

DOCTOR: Ace, give me some of that Nitro Nine that you're not carrying.

MIKE: I found him wandering the streets.

DOCTOR: I was not wandering the streets. I was merely contemplating certain local cartographic anomalies.

ACE: We did good, didn't we?

DOCTOR: Perhaps. Time will tell. It always does.

DAVROS: The Daleks shall become Lords of Time! We shall become all-

DOCTOR: - Powerful. Crush the lesser races. Conquer the galaxy. Unimaginable power. Unlimited rice pudding, et cetera, et cetera.