Time Lords regenerate because they have a injury or something is wrong, it's their way of healing themselves.
The tenth doctor regenerated because he absorbed all the radiation from a radiation chamber to save Wilf's (Donna Noble's grandfather's) life. Wilf knocked four times, so the Doctor knew it was time for him to die (because in effect the tenth doctor dies and the eleventh doctor is born). Episode: The End of Time (part 2) I know this all true but actually the doctor was a little bit scared of what will happen to him when he regenerates for the tenth time because he absorbed all the radiation in order to save dona's grandfather so noble family won't respect him as a enemy. The doctor was friendly but angry at the time but wanted to filled the prophecy so he knocked four times. ] first time : stop the master plan to take over the universe second time : help donna's grandfather third time : visited all companions even know he injured from radition four time : successfully regenerated into his eleventh incarnation with a few injuries but did as wuz predicted
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.
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.
If the Doctor regenerates then the T.A.R.D.I.S regenerates. If the T.A.R.D.I.S blows up or something, then the Doctor will die. It basically has a part of him made in it.
Eleventh Doctor was created in 2010.
He will regenerate into the 12th Doctor.
He'll regenerate into the 13th Doctor.
Matt Smith is the eleventh Doctor.
Matt Smith.
The eleventh Doctor is Matt Smith.
The fourth Doctor fell off a bridge.
Eventually yes, he will regenerate into the twelfth Doctor.
Matt Smith.
The Eleventh Hour was recorded during October 2009.
"The Beast Below" was the episode that aired after "The Eleventh Hour".