There have been twelve doctors total, it might take up a little bit too much space here for their entire sum plot synopsis. three words though, Doctor Who Wiki.
I know about the Doctors, my point is asking what the actual plot is. A narrative needs a plot. A beginning, middle and end.
For example: Lost
Plane crash lands on mysterious island. Survivors discover other, mysterious people live there, they find a bunch of weird stuff like a hatch with a man inside pressing a button stopping the world ending, and sick people are healed, and there's a big clash as the survivors split into believers and skeptics. There's a smoke monster man who turns out to be more or less evil incarnate, and the island turns out to be some special magical place where evil is kept prisoner. Most of the survivors die, turns out the whole thing was planned because Jacob needed to recruit a new guardian of the island. He recruits Hurley. The end.
What would be a similar synopsis of Doctor Who?
It doesn't need explaining. I don't see why people can't just live in the 'now' of a show and forget about the other series. That's why it's the longest running Sci-Fi show ever.
What you're saying then is that it's the longest running because there's no story to follow. If there's no story to follow, what are people watching? A narrative needs a . . . narrative. If you can just forget about other series then there can't be any real story going on. Coronation Street has been running a long time too, because there's no story.
Maybe there is a plot, that's what I'm asking about.