Originally Posted by Rorschach:
“Or 16.
This is a long running problem of continuity in the Who world.
In a story staring the 4th Doctor, Tom Baker, called "The Brain of Morbius" the Doctor gets involved in a battle of minds with Morbius.
Morbius (another Time Lord) asks "How long have you lived?" and seemingly in reply we see Jon Pertwee's image (3rd Doctor), Patrick Troughton's image (2nd Doctor), William Hartnell's image (1st Doctor) and then another half dozen images of people in period costume which you have to assume are earlier regenerations of the Doctor working backwards.*”
I don't think you have to assume that at all. It's one interpretation, but the first time I saw it I assumed they were people the Doctor had met on his travels, or maybe his family back on Gallifrey. The other fan-theory is that they're Morbius' past incarnations as the Doctor gains the upper hand in the mind-battle.
Quote:
“So if you take that as cannon (and not a script writers folly) Tom Baker would actually be the the 10th Doctor and not the 4th which would make Tennant the 16th.
This is a problem because another piece of cannon "law" is that Time Lords can only have 12 regerations before they die for real. The Master has extended this number before but he's used nasty methods like stealing the bodies of others.
The case for the defence however has Peter Davidson, the 5th Doctor, once stating that he had already used 4 of his 12 regenerations which would confirm that Hartnell was the first but ignores the images in The Brain of Morbius.”
There's a fair bit of evidence to support the idea that Hartnell was the first. In 'The Three Doctors' the Time Lords refer to Hartnell as the earliest incarnation. Davison's mention of having used up four of his regenerations comes from 'Mawdryn Undead' and again in 'The Five Doctors' he's said to be the fourth regeneration/fifth Doctor. In 'Time And The Rani' the Doctor says he's in his "seventh persona" and then there's the aforementioned sketchbook from 'Human Nature'.
So weighing all that up against a few faces of dubious origin I'm happy to go with the 'standard' interpretation of events.