Doctor Who’s first ever anniversary story was a multi-Doctor story and the logical flaw of “Why doesn’t the Pertwee Doctor remember experiencing these events from the Hartnell Doctor and the Troughton Doctor’s perspective” is never really addressed but going forward the show just sort of accepts…
THE DOCTOR: Rose, you’ve got to stop this! You’ve got to stop this now! You’ve got the entire vortex running through your head. You’re gonna burn.
ROSE: I want you safe. My Doctor. Protected from the false god.
DALEK EMPEROR: You can not hurt me. I am immortal.
ROSE: You are tiny. I can see the whole of time and space. Every single atom of your existence. And I divide them. Everything must come to death. All things. Everything dies. The Time War ends." Doctor Who - The Parting of the Ways - Series 1 (via ashleyls17)