The Eighth Doctor was initally killed by the starship he was on board crashing onto the planet Karn, where the Sisterhood of Karn (previously seen in the 4th Doctor story 'The Brain of Morbius') were able to not only trigger his regeneration, but by using their elixir were able to deliberately engineer it so that the change did not have to be random, as the Time War was in full flow, of which the Doctor had played no part up to that point. By drinking a goblet of the elixir modified to make him a warrior, he was able to take the shape of a man fit for battle, rejecting his name in the process. 'The last seconds of the 2013 mini episode 'The Night of the Doctor' see a newly regenerated younger version of John Hurt's 'Doctor' looking at himself in the mirror and uttering the words 'Doctor no more'.
The eighth Doctor regenerated offscreen and nothing is known about how or why he regenerated. The eighth Doctor appeared onscreen only once in a TV movie. We know th Time War happened between the TV movie and the start of the 2005 series. It's widely assumed that whatever the Doctor did to end the Time War caused him to regenerate.
Time Lords regenerate because they have a injury or something is wrong, it's their way of healing themselves.
Trenzalore (his final resting place), in the town of Christmas
He regenerated because his current body was getting old, so it was of natural causes.
He died of old age, pretty much. He was an elderly man to begin with, and the stress and strain of defeating the Cybermen in 'The Tenth Planet' took its toll. He collapsed in the TARDIS and in a scene that no video footage remains for, he regenerates into the Second Doctor.
It is unknown, the Eighth Doctor only appeared in a movie.
The eighth Doctor regenerated offscreen and nothing is known about how or why he regenerated. The eighth Doctor appeared onscreen only once in a TV movie. We know th Time War happened between the TV movie and the start of the 2005 series. It's widely assumed that whatever the Doctor did to end the Time War caused him to regenerate.
No episode has shown the 8th Doctor's regeneration. He was never in any series of the show, he was in the American made TV movie and in that movie they showed the 7th Doctor regnerate into the 8th, but we don't get to see the 8th regenerate into the 9th Doctor. It goes from the movie, to the revamp in 2005 with the episod Rose where the assumption seems to be that the 9th Doctor is fairly new and possibly recently regenerated.
He'll regenerate into the 13th Doctor.
Eighth Doctor was created in 1996.
He will regenerate into the 12th Doctor.
The fourth Doctor fell off a bridge.
Eventually yes, he will regenerate into the twelfth Doctor.
Romana was another Time Lord, like the Doctor.
Paul McGann was the Eighth Doctor in 1996
Paul McGann was the Eighth Doctor in 1996
The Eighth Doctor was Paul McGaan.