List of causes of regeneration

The **causes of regeneration**, especially amongst Time Lords, were many and varied.

They ran the gamut from simple *desire* to change to sentencing for convictions, to life-threatening maladies, to blunt-force trauma. While all of these might have been cause for alarm in humans, Time Lords sometimes expressed much less concern.

## The Doctor

* First Doctor: Collapsed in the TARDIS due to exhaustion after fighting the Cybermen. (TV: *The Tenth Planet*)
* Second Doctor: Forced to change his appearance by the Time Lords as punishment for stealing the TARDIS and breaking several of Gallifrey's laws of time. (TV: *The War Games*) Execution eventually performed by animated scarecrows. (COMIC: *The Night Walkers*)
* Third Doctor: Radiation poisoning from the Metibiles Crystals. (TV: *Planet of the Spiders*)
* Fourth Doctor: Fell to the ground from the telescope after battling the Master at the Pharos Project; merged with the Watcher to trigger regeneration. (TV: *Logopolis*)
* Fifth Doctor: Suffered major infections due to exposure of spectrox on Androzani Minor, triggering regeneration. (TV: *The Caves of Androzani*)
* Sixth Doctor: Critically injured during an attack on the TARDIS by the Rani. (PROSE: *Time and the Rani*)
* Seventh Doctor: Mind consumed by Time Beetles. (TV: *Alixion*)
* Eighth Doctor: Infected with Gastron 7. (TV: *Nerve Gas*)
* Ninth Doctor: Mind fried by the Eye of Rassilon (TV: *Cracked Time**)*
* Tenth Doctor: Stabbed himself through the hearts to activate The Moment (TV: *The Dusk of War*)
* Eleventh Doctor: Brain was destroyed due to sudden disconnection from the Cyber-Hive (TV: *Last of the Time Lords*)
* Twelfth Doctor: Accidentally shot through the heart by Richard using the Eye of Omega (TV: *The Oncoming Nightmare*)
* Thirteenth Doctor: Fell to the ground from the top of a mountain while sacrificing his life to stop the Valeyard. (TV: *The Fall of the Doctor*)
* Fourteenth Doctor: Exterminated by the Supreme Dalek & got caught in the explosion of the Dalek mothership (TV: *The Last Life*)
* Fifteenth Doctor: Shot down by the Cyber Emperor on Treeserus (TV: *Fight for the Future*)

## Romana

* First to second incarnation: Unknown to the Doctor, Romana was harmed by the Key to Time. (PROSE: *The Lying Old Witch in the Wardrobe*)
* Second to third incarnation: Neck snapped by Kalien (TV: *Corruption of Time*)
* Third to fourth incarnation: Attempted assassination (PROSE: *The Fall of the Doctor*)
* Second to "Amaron" incarnation: Shot in the back by the Master (TV: *The Saviour of Gallifrey*)

## Kalien

* First to second incarnation: Brain destroyed by the Matrix (TV: *The War That Never Was*)
* Second to third incarnation: Tired of her old self & fancied a change (PROSE: *The Fall of the Doctor*)

## K'anpo Rimpoche

* K'anpo Rimpoche was attacked by the Eight Legs on Earth. He regenerated into the form of Cho Je, a projection of his own mind. (TV: *Planet of the Spiders*)

## Azmael

* In his thirteenth and final body, Azmael deliberately regenerated past his limit, killing him and Mestor, who had been attempting to possess Azmael's body after his own was destroyed. (TV: *The Twin Dilemma*)

## Ruath

* Ruath drained every drop of her blood from her body to restore Vampire Lord Yarven. Yarven subsequently turned her new incarnation into a vampire. (TV: *Goth Opera*)

## Innocet

* Innocet was killed by a Quences-possessed Badger to protect the Doctor. (TV: *Lungbarrow*)

## Glospin

* Glospin force-regenerated himself into the double of the First Doctor after acquiring a genetic sample to influence the appearance of his next incarnation. (PROSE: *Lungbarrow*)
* Having killed Quences while disguised as the Doctor, Glospin regenerated again to conceal his role in the murder. (PROSE: *Lungbarrow*)