Strikerkc
Sr Member
Everything is a historical event when you have a time machine and no "home" period of time.
In doctor who, the term is really more "fixed point". Something so drastically important to a world's history, or history of the universe, that changing it could nearly undo time itself.
It's the core concept behind them not killing Hitler, not strangling baby Master in his crib, etc. But they also extended it to why they need to make sure certain GOOD things DO happen, and prevent other time hoping jerks from undoing those good things, every now and then.
The idea being that lots of the other filler stuff between big events could change, but the big events would still happen regardless.
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