The tenth Doctor hadn't expected any visitors. He hadn't called anyone to his cause, not in the sense of gathering assistants to help him build the engines that would allow him to utilize the Skasis Paradigm in a constructive and controlled manner. The science was too complicated, the computers too delicate, the equations crossing into dimensions and concepts that required a Time Lord's senses to be perceived and fully understood. Oh, there were surely other aliens in the area whose intelligence might come close to grasping the full glory of the Skasis Paradigm, to understanding the build of the machinery that would implement the changes the Doctor used the code the achieve, but would they help him? He wasn't certain. He wasn't even certain if he wanted their help. Some of them were so far gone, perhaps too far gone.
It was all right, though. He would fix it. He would fix everything. This universe would be set right, just as his had been, and more than that, the other Doctor's universe would be saved, rewritten so that his counterpart made the right choice and restored Gallifrey, made of the Time Lords a civilization worth saving.
If only he could help the others to see that he was doing this for them, for their own sakes, for the good of the whole of creation.
He ignored the TARDIS, at first. It was difficult to do. The feel of her trapped in that human body was so very, very wrong. She would never have to face that fate in his reality. He had found House after he had restored Gallifrey and found certain old friends still missing. He had unwritten the asteroid and its predations. The Corsair was still alive, hale and whole and a woman again. The TARDISes that had been consumed were once again within their proper shells, traversing the whole of time and space. His TARDIS had certain never fallen victim to that creature, never been forced into a body that was too small for her immense consciousness.
"It won't," he finally told her, glancing up from the innards of a scavenged desktop computer. "Everything will be put back where it should be, set on a new course, a course that spares these people a war between heaven and hell, lives that are too painful to live."