I've been slowly making my way through Doctor Who and have just recently gotten to the Fourth Doctor. I come before you now with a question.

How successful would you say The Doctor's mission was in Genesis of the Daleks?

My first thought after just finishing it was that it was a complete failure save for the fact that his interference saved Davros(I really shouldn't know about that yet, but I do).

But then I started thinking. When the Doctor was spilling the beans to Davros about all of the Daleks failures he says some interesting things. First he states that the Dalek invasion of Earth occurred in the year 2000. But we know it happened in the 22nd century. He also mentions attacks against Mars and Venus. Which we'd never heard of before now.

There's also the matter of the Daleks being much weaker when we first encounter them in The Daleks where they rely on static power and can only function on metal floors. Whereas at their birth they were fully mobile and capable of traversing war torn terrain.

Could it be that the Doctor was more successful than he realized? That his actions on Skaro altered time and that the show had been following this altered timeline up until now?