-
First Regeneration
Episode: Tenth Planet
Reason: Claimed to be "wearing a bit thin"; apparently died of simple old age. -
Period: to
Dates and Episodes of Doctor Who Regenerations
The causes of regeneration, especially amongst Time Lords, were many and varied. They ran the gamut from simple desire to change, to life-threatening maladies which typically resulted in human death. The following are the known causes of regeneration of specific Time Lords. -
Second Regeneration
Episode: The Night Walkers
Reason: Forced to change his appearance by Time Lord court order -
Third Regeneration
Episode: Planet of The Spiders
Reason: Radiation poisoning upon exposure to The Great One's highly unstable web of Metebelis crystals. -
Fourth Regeneration
Episode: Logopolis
Reason: Fell to the ground from great height at the Pharos Project; indirectly caused by the Master -
Fifth Regeneration
Episode: The Caves of Androzani
Reason: Refusal to take antidote for spectrox toxaemia in order give it instead to Peri Brown. -
Sixth Regeneration
Episode: Spiral Scratch
Reason: Ambiguous injury consequent to the Rani's attack on the TARDIS. Some accounts indicated the Doctor hit his head on the TARDIS console. Others suggest that he was also suffering from a chronal energy drain after his confrontation with the Lamprey -
Seventh Regeneration
Episode: Doctor Who
Reason: Following a non-fatal shooting, the Seventh Doctor underwent open heart surgery in a San Francisco hospital. Since the attending cardiologist had no knowledge of Time Lord physiology, she accidentally killed him. -
Eighth Regeneration
Episode: The Night of The Doctor
Reason: Died after a ship he was in crash-landed on Karn -
Ninth Regeneration
Episode: The Parting of Ways
Reason: Absorbed time vortex energy from the Bad Wolf to save the life of Rose Tyler -
Tenth Regeneration
Episode: The End of Time
Reason: Intentional radiation poisoning incurred in order to save the life of Wilfred Mott -
Eleventh Doctor
Episode: The Day of the Doctor
Reason: Intentional radiation poisoning incurred in order to save the life of Wilfred Mott
