skaeight said:
I didn't quite finish the 1st season of Doctor Who. Is this a reboot, or did they just replace the Dr?
The first season wasn't really the first...more like the 89th.
The show started back in the early 1960s, then went on hiatus for about ten years until what you know as the "first" season.
Back in the 60's, the actor who first played the Doctor was getting along in years and his health was failing, so they decided to play up the fact he was an alien, and introduce the concept of the Doctor "regenerating" when near death.
All Time Lords regenerate when they're dying, either due to injury, accident, old age, etc.
The Doctor has done it a good many times, with seven actors playing him over the years.
After the show went in its big hiatus, the seventh actor appeared briefly in a TV movie that attempted to restart the series, regenerating into the eighth version of the Doctor.
Nothing came of the movie, and when the series got going again with the "new first season", we saw a 9th Doctor, with only hints at what'd happened to his previous self.
At the end of the "first" season, that Doctor sacrifices himself to save Rose, and regnerates into the guy you've noticed is the Doctor in the third season. (Been around since the last few moments of the first season.) He's the 10th to play the role.
Problem?
It was established back during the original run that a Time Lord can normally only regenerate 12 times.
We've nearly used'm all up.
There was a hint long ago that additional regenerations can be managed, but we don't know by what means...and the rest of the Time Lords are now gone.