The Doctor: You can't rule the world in hiding. You've got to come out on the balcony sometimes and wave a tentacle, if you pardon the expression.
Castrovalva - S19-E1
The Doctor: That's the trouble with regeneration, you never quite know what you're going to get. (00:12:15)
The Doctor: This is a situation that requires tact and finesse. Fortunately, I am blessed with both.
Biroc: The weak enslave themselves.
The Master: The Doctor won't tolerate anyone deliberately playing havoc with his favorite planet.
The Doctor: I'm not only from another culture but another planet. I am in your terms an alien.
The Doctor: Small though it is, the human brain can be quite effective when used properly.
The Doctor: I think you'll find, Sir, that I'm qualified to deal with practically everything, if I choose.
The Doctor: Oh, marvellous. You're going to kill me. What a finely-tuned response to the situation.
The Master: I don't know, rocket fire at long range - somehow it lacks that personal touch.
The Master: But first things first. I've a death to arrange.
The Doctor: Deactivating a generator loop without the correct key is like repairing a watch with a hammer and chisel. One false move and you'll never know the time again.
The Doctor: You're a beautiful woman, probably the best.
The Doctor: As we learn about each other, so we learn about ourselves.
Answer: It was never destroyed on-screen; it was intact at the end of the TV movie, and destroyed by the start of the 2005 series. It was destroyed in the novel "The Ancestor Cell," but in a completely different manner to what happened in the series.
DaveJB