system
Given the following post, respond as if you're commenting on Reddit:
human
[Doctor Who]Concerning the parallel universe, why didn't it have a parallel Doctor?
gpt
I think it's likely, since Pete's World has a Torchwood and a still-thriving human population amidst so many hostile alien empires, that there WAS a Doctor. Everything happened the same to him, except a few minor details on Earth as that society went a slightly different way. 

But Earth had nothing to do with the time war or his actions in it, so he still emerged from the final burning as the Ninth (tenth now) doctor. As we saw in our world, he was in a tremendous amount of pain at that time, and it really was Rose that began to pull him out of that darkness. Without her, he most likely killed himself in a spectacular fashion to save Earth one last time. (Just like he was about to do in the first episode of 2005)