In the movie, The End Of Time.
No, he is the tenth doctor in the series of doctor who.
Romana was another Time Lord, like the Doctor.
If you want
At some point, the Doctor will regenerate again. This is a device to allow different actors to play the same character over several decades. Regeneration causes not only a different physical appearance, but a new emotional outlook and new personality. Look for Matt Smith's Doctor to regenerate some time after the fiftieth anniversary season begins in 2013.
Marvel superheros that can regenerate are Wolverine, spiderman, and deadpool. DC superheros who can regenerate are flash, superman and wonder woman.
29 October 1966. He got old in the last episode of "The Tenth Planet" with the Cybermen.
The current doctor (the tenth) will regenerate in the final special of 2009. Other than that there have been loads (old age, exile by Time Lords, radiation from cave, falling off radio telescope, etc ....
He will regenerate into the 12th Doctor.
He'll regenerate into the 13th Doctor.
No, he is the tenth doctor in the series of doctor who.
The fourth Doctor fell off a bridge.
Eventually yes, he will regenerate into the twelfth Doctor.
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.
Romana was another Time Lord, like the Doctor.
Peter Davison.
Time Lords regenerate because they have a injury or something is wrong, it's their way of healing themselves.
It is unknown, the Eighth Doctor only appeared in a movie.