Okay, so on the Who on Who radio programme, they played a little audio clip of the second part. Here is the clip for people who want it, of course, don't click play if you don't want to hear it! :D
Transcript (highlight to view):
Doctor: You could be so wonderful
Master: Where is it?
Doctor: You're a genius, you're stone-cold brilliant, you are. I swear you really are, but you could be so much more, you could be beautiful, with a mind like that, we could travel the stars. It would be my honour, because you don't need to own the universe, just see it. You have the privilege to see the whole and time and space. That's ownership enough.
Master: Would it stop then? The noise in my head?
Doctor: I can help
Master: I don't know what I would be without that noise.
Doctor: Wonder what I'd be without you.
Also, we have the clip to fit with this audio, shown on Alan Carr: Chatty Man on the 29th.