selenak

So, the series 3 Doctor Who soundtrack which I acquired two months ago informs me that track 23, aka the theme you'll recall from the Gallifrey flashback in Sound of Drums, is called This is Gallifrey: Our Childhood, Our Home. Upon rewatching the last three episodes of s3, I took note of when else it's used, and this is what I got:

1) When Yana and the Doctor first meet and start running to Yana's lab, holding hands.

2) When the Doctor has his "boost reversal circuit" inspiration after Yana said "but at least it's hope" (to which the Doctor replies "quite right, too", which is exactly what he says to Rose in Doomsday, btw).

3) During their entire "Professor, you're brilliant"/"some admiration would have been nice"/"well, you've got it now" conversation.

4) When Yana overhears the word "regeneration" while the Doctor is talking to Jack and starts to hear past Master voices on a massive scale.

5) As mentioned, during the whole "some will be inspired, some will run away, some will go mad" sequence, starting after Jack's "how come the ancient society of Time Lords produced a psychopath?" question and ending when Martha asks "what about you?" and the Doctor replies "oh, I ran, and I never stopped".

6) Starting with the Master's "will it stop, Doctor?" through the funeral pyre scene.

Now, New Who already has a different musical theme for the whole Time Lord mythical aspect (first heard, I think, when Jabe uses the term "Time Lord" towards Nine in The End of the World or Nine makes his "I can feel the earth spinning" speech to Rose; btw, in the easter egg audio commentary to The Five Doctors Phil Collinson and David Tennant joke they've nicknamed that one "Chancellor Flavia's theme" and hum it every time Flavia shows up in The Five Doctors). OTOH, while track 23 is indeed used for Gallifrey as well, they mainly use it as a musical cue for the most emotional moments of the Doctor/Master relationship.