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Donna Noble's Ending
When Brainiac invaded, everyone panicked. I should've too, but I got the feeling that I've done this before. Then, all of the sudden, I found myself on board that space-man's ship. I don't know why I was there, then Brainiac told me he found in me an anomaly, after analyzing it, he revealed to me that I am part human and part of a species called the Time Lords. It all started coming back to me! That Doctor made me forget everything! But I knew why, as soon as I started remembering everything, the Doctor Donna was free again. After helping the heroes lay waste to Brainiac, I took a bit of his neurotechnology, and fixed my head so that the Doctor Donna wouldn't be the end of me. Unfortunately, it required bonding to Brainiac's ship. However, this turned out to be a good thing, after bonding with Brainiac's ship, I found his collection, billions of souls trapped aboard his ship. Using my recovered Doctor-level intellect, I took these civilizations across the universe, finding them new homes. You know, I wonder what the Doctor would say if he saw me now.