List of causes of regeneration

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Thecauses ofregeneration, especially amongstTime 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 inhumans, Time Lords sometimes expressed much less concern. As theTwelfth Doctor once toldClara, "Death [was]Time Lord forman-flu". (TV:Hell Bent)

The following are the known causes of regeneration of specific Time Lords or other regenerating individuals.

Gallifreyan Time Lords[[edit] |[edit source]]

Aboutthe Doctor

The Doctor's universe, including alternate or aborted timelines[[edit] |[edit source]]

The Doctor[[edit] |[edit source]]

See also:The Doctor's perspectives on regeneration

TheTime Lord known asthe Doctor was known to regenerate on several occasions.

IndividualIncarnationDetailsSources
The DoctorFirst Timeless ChildAccidentally fell from a cliff while playing with another child.TV:The Timeless Children
Second Timeless ChildForced to regenerate by theFirst Tecteun to enable her to decode the "secret" of regeneration.
Third Timeless Child
Fourth Timeless Child
Fifth Timeless Child
Sixth Timeless Child
First DoctorCollapsed due to his "old body wearing a bit thin" after hislife force was drained byMondas, and was regenerated byhis TARDIS.TV:The Tenth Planet
TV:The Power of the Daleks
Second DoctorForced to regenerate byTime Lord court order as punishment for stealing theTARDIS and breaking thenon-interference law. After the sentence was delayed, he was ultimately forced to complete his regeneration byanimated scarecrows sent by the Time Lords.TV:The War Games
COMIC:The Night Walkers
Third DoctorRadiation poisoning upon prolonged exposure tothe Great One's highly unstable web ofMetebelis crystals. Drifted through time for ten years dying of the radiation poisoning before he returned to Earth, and had his regeneration triggered byCho-Je to compensate for the Doctor being unable to trigger it himself.TV:Planet of the Spiders
PROSE:Love and War
During theWar in Heaven, history was altered so that the Third Doctor's regeneration was instead caused by a fatal shot to the chest fromMagdelana Bishop. Thebullet entered hisribcage at an angle which didn't damage any major organs; he instead died ofblood loss.PROSE:Interference - Book Two
Fourth DoctorFell to the ground from the telescope after battlingthe Tremas Master at thePharos Project; merged withthe Watcher, a projection of himself who had helped him prepare for his upcoming demise, at the moment of regeneration.TV:Logopolis
Fifth DoctorContractedspectrox toxaemia onAndrozani Minor, triggering regeneration. Regeneration completed after resisting the Master's attempt to stop his regeneration using their shared mental link toKamelion.TV:The Caves of Androzani
AUDIO:Winter
Sixth DoctorAccording to one account, sustained physical injuries during theFirst Rani's attack on his TARDIS.PROSE:Time and the Rani
According to another account, while suffering fromchronon energy starvation after his confrontation with theLamprey, the Sixth Doctor died from blunt head trauma caused by the Rani's attack.PROSE:Spiral Scratch
According to a third account, regenerated following intentional exposure to focused beams of a radiation lethal to Time Lords consequent to the Rani's attack onthe TARDIS in order to foil a plot bythe Valeyard.AUDIO:The Brink of Death
Seventh DoctorFollowing a non-fatal shooting, the Doctor was taken to aSan Franciscohospital, where subsequent exploratory surgery byGrace Holloway with a camera accidentally clogged a vein; the anaesthetic he had been given delayed regeneration for several hours.TV:Doctor Who
In an alternate timeline in which theNazis wonWorld War II, the Seventh Doctor was gunned down by Nazi soldiers, and regenerated into analternate eighth incarnation.AUDIO:Klein's Story
Eighth DoctorDied after a ship he was in crash-landed onKarn, but wasresurrected for four minutes by theSisterhood of Karn. After his four minutes were up, he regenerated after drinking from a chalice whichOhila told him she had prepared herself to guide his change towards the form of a "warrior". Ohila would later claim that the drink she gave him was justlemonade anddry ice, and her "moment of theatre" was simply an act to trick him into regenerating.TV:The Night of the Doctor
PROSE:The Day of the Doctor
In an account where he never regenerated on Karn, the Eighth Doctor instead regenerated from injuries he had sustained from activatingthe Moment, with assistance fromthe Restoration.PROSE:Doctor Who and the Time War
"Listless-looking" ninth DoctorIn a possible future for the Eighth Doctor (PROSE:The Tomorrow Windows) wherethe Doctor's ninth incarnation was a "listless-looking" man who prepared to marryhis companion, he was killed by aDalekgunstick blast intended forthe Master.TV:The Curse of Fatal Death
Quite Handsome DoctorInjured attempting to repair the Daleks' Zectronic Beam Controller while hiding fromEmma and the Master.
Shy Doctor
Handsome DoctorHit by a discharge of purezectronic energy, which was believed to have destroyed his regenerative ability. However, the Doctor was nevertheless able to regenerate into hisnext incarnation.
War DoctorRegenerated from his body "wearing a bit thin".TV:The Day of the Doctor
Ninth DoctorDirectly absorbed theheart of the TARDIS, and the energies of theTime Vortex itself, from theBad Wolf to save the life ofRose Tyler, causing "every cell in his body" to die.TV:The Parting of the Ways
Tenth DoctorGrazed by the blast from aDalek gun stick, causing a regeneration. However, the Doctor directed theregeneration energy to hissevered hand, aborting a full regeneration by healing the damage he had sustained before needing to change bodies. This resulted, later down the line, in the creation of ameta-crisis Tenth Doctor and of theDoctorDonna.TV:The Stolen Earth
TV:Journey's End
Radiation poisoning intentionally incurred in order to save the life ofWilfred Mott.TV:The End of Time
Eleventh DoctorBelieved to be near death from old age, a new regeneration cycle granted by the Time Lords automatically triggered a regeneration.TV:The Time of the Doctor
Twelfth DoctorElectrocuted by aCyberMondan, but delayed the regenerative process. Later shot repeatedly by another Cyberman and caught in amassive explosion, triggering the regeneration further. The regeneration was purposely delayed because he desired to not change again, only accepting the change after a meeting with the First Doctor.TV:The Doctor Falls
TV:Twice Upon a Time
Thirteenth DoctorMortally wounded by theQurunx's destruction beam after it was redirected towards her by theSpy Master.TV:The Power of the Doctor
Fourteenth DoctorShot bythe Toymaker using agalvanic beam atUNIT HQ. Unusually, this triggered abi-generation, causing the Fourteenth andFifteenth Doctors to exist as separate entities.TV:The Giggle
Fifteenth DoctorSavedPoppy by punching a ton ofregeneration energy into theHeart of the TARDIS to jolt theTime Vortex by one degree, triggering a regeneration that could not be aborted, despite the Doctor having not sustained a fatal injury.TV:The Reality War
"Previous Doctor"Regenerated intoa new incarnation after being attacked onKarn while on a mission for theTime Lords.AUDIO:Seven Keys to Doomsday
"Previous Doctor"Regenerated intoa new incarnation after being shot in the back shortly after a meeting withMestizer.PROSE:The Cabinet of Light

The Master[[edit] |[edit source]]

Thoughthe Master famously stole bodies from others, they did alsoregenerate, many times. By most accounts, they were on their lastincarnation when they began body snatching. Later on, the Master was granted a newregeneration cycle.

IndividualIncarnationDetailsSources
The Master"Koschei of the Darkheart"Died from falling into a black hole, forsaking the name of "Koschei" in his last moments and vowing to become "the Master" in his new life.PROSE:The Dark Path
UnknownDrowned.AUDIO:The Long Despair
First MonkIn an account where he was an incarnation of the Master, at least according to theCelestial Intervention Agency, the First Monk was shot by theDaleks following his failure in theKembel Master-Plan.PROSE:CIA File Extracts
The War ChiefAccording to some accounts in which he was an early incarnation of the Master, the War Chief escaped theTime Lords inhis TARDIS after being shot bythe War Lord's personal guards. They would next pick up his trail onEarth, by which time he appeared asan older man with a graying beard.PROSE:Doctor Who and the Terror of the Autons
According to another account, which did not specify the War Chief as a past incarnation of the Master, after being shot by the War Lord, the War Chief managed a partial regeneration into a deformed incarnation who called himself "Felix Kriegsleiter" during his activities in1940sGermany, and continued to help the War Lord's people. His regenerative process then became "stuck", butAce later saw it kickstarting again as the War Chief stood in a burning building.PROSE:Timewyrm: Exodus
"Penultimate" MasterAccording to one account, the Master was hit by a blast of artron energy when his attempt to attack theTwelfth Doctor backfired, and he subsequently regenerated.COMIC:Doorway to Hell
According to other accounts, he never properly regenerated, reemerging directly as the disfiguredDecayed Master either from walking through atime corridor unprotected, or after being shot with his ownTissue Compression Eliminator bySusan Campbell while holding aDalek transmutation device.PROSE:CIA File Extracts
PROSE:Legacy of the Daleks
Thirteenth MasterAccording to one account, the last incarnation of the Master's original cycle attempted to regenerate after sustaining deadly injuries, but, as he had no more regenerations, the process backfired, leaving him a disfigured ghoul.PROSE:Meet Missy!
Decayed MasterUsed the power of theEye of Harmony to partially heal himself, altering his voice and facial appearance but still leaving him skeletal.TV:The Deadly Assassin,AUDIO:Trail of the White Worm
Used the power of theKeeper of Traken to merge withConsulTremas ofTraken, a process which the resultant Master later described as "not exactly" a regeneration to theThird Doctor, though theFifth Doctor would later refer to this as a regeneration.TV:The Keeper of Traken
Tremas MasterAccording to one account, after the body of Tremas was stripped from him by the Time Lords, a non-corporeal Master properly regenerated back into a Gallifreyan body with the appearance of his "Tremas" incarnation usingregeneration energy stolen from his own past selves.PROSE:The Velvet Dark
According to one account, after having his Tremas form converted into a genetically-accurate Gallifreyan body usingTzunnanites, the Master was shot byAce, and regenerated intoa new incarnation.PROSE:First Frontier
Old MasterAccording to one account, pulled himself back together from his ashes as aDeathworm Morphant after being exterminated by theDaleks.TV:Doctor Who
Decayed MasterAfter gaining many new bodies throughDeathworm Morphant-aided body theft as opposed to any kind of regeneration, the Master was reverted to his decaying form and died, but ultimately gained a newregeneration cycle from his other incarnations.AUDIO:Day of the Master
War MasterIn one later-aborted timeline, regenerated during theLast Great Time War of unknown causes into achildlike, but inwardly cunning, incarnation.COMIC:The Organ Grinder,Fast Sleep
Shot byChantho after returning to his proper identity after years living asProfessorYana under theChameleon Arch.TV:Utopia
Saxon MasterAccording to one account, mortally wounded while fightingRassilon.PROSE:Pandoric's Box
According to another account, the Master was stabbed in the back with a hiddendagger by hisnext incarnation in such a precise way that he had time to reach his TARDIS before regenerating.TV:The Doctor Falls
MissyShot by theSaxon Master in a manner preventing normal regeneration, but managed to survive by creating anElysian field to "kick start a new regeneration cycle". The process of cryogenetic extraction destroyed her body, but retained a copy of her consciousness before regeneration, though casting out most of the "darkness" in her soul.TV:The Doctor Falls
AUDIO:The Lumiat
The LumiatShot by Missy after she "[grew] bored" of her, and was forced to regenerate.AUDIO:The Lumiat

Borusa[[edit] |[edit source]]

IndividualIncarnationDetailsSources
BorusaUnspecified incarnations betweenthe Decayed Master's meddling with theEye of Harmony and theFourth Doctor's adventure opposite theKrikkitmen.Regenerating after being killed by a falling stack ofbooks.PROSE:Doctor Who and the Krikkitmen
Regenerated in a way somehow caused by a missing decimal point.
Regenerated due to an infected toenail.
One President BorusaRegenerated due to the stress of the office of Lord President into astubborn and grandiose incarnation who soughtimmortality in theTomb of Rassilon.PROSE:The Legacy of Gallifrey
"Tomb of Rassilon" BorusaWas freed by Rassilon from the Tomb, and reverted back to an earlier, more stable incarnation in the process.PROSE:The Eight Doctors

Romana[[edit] |[edit source]]

IndividualIncarnationDetailsSources
RomanaRomana IRegenerated intoRomana II after appearing to "try on" several possible appearances insidethe Doctor's TARDIS.TV:Destiny of the Daleks
According to one account, unbeknownst to the Doctor, Romana I had been harmed by theKey to Time, and she regenerated inside a force field hidden away, while the "possible Romanas" the Doctor saw were projections of the TARDIS.PROSE:The Lying Old Witch in the Wardrobe
According to other accounts, Romana I regenerated willingly "for the fun of it".PROSE:City of Death
According to yet another account, she triggered a regeneration to try and purge the influence ofPandora from her mind.AUDIO:Lies
Romana IIAccording to one account, regenerated in preparation for theWar in Heaven, adopting a body and attitude more suited for combat as theWar QueenRomana III.PROSE:The Shadows of Avalon
In another account, Romana II started to regenerate into a different third incarnation due to contact with the decayingEye of Harmony insidethe Matrix, interacting with a projection thereof inside the Matrix. However, this regeneration didn't take hold due toK9 Mark II removing her from the Matrix in time.AUDIO:Renaissance,Ascension
In an aborted timeline, Romana II regenerated to give a power boost to theMoros engine shields in order to stop a black hole being formed. This regeneration was prevented byIrving Braxiatel due to the potential third incarnation wanting to stop the Omega war.AUDIO:Enemy Lines
Romana IIIAfter using apsychic attack onOfrin, an elderly form of theRomana III who had ledGallifrey in theWar in Heaven died of exposure to the elements on an unnamed planet near theheat death of the universe and regenerated into a new, dark-skinned incarnation.PROSE:Tomb of Valdemar

Rassilon[[edit] |[edit source]]

IndividualIncarnationDetailsSources
RassilonFirst incarnationAccording to one account, Rassilon regenerated for the first time following accelerated ageing due to the temporal radiation of theEye of Harmony's elemental forces and the stress of the situation he was in.PROSE:The Legacy of Gallifrey
Resurrected RassilonFollowing his resurrection in theLast Great Time War, Rassilon was wounded by theSicari, who had been allowed in Gallifrey byRomana II and theWar Livia Caralis, and was forced to regenerate.AUDIO:Assassins
"Final Day" RassilonAttacked bythe Saxon Master, who "stuffed his face full ofWhite-Point Stars," causing Rassilon to regenerate.PROSE:Lords and Masters

Other Time Lords[[edit] |[edit source]]

IndividualIncarnationDetailsSources
The HermitK'anpoAttacked by theEight Legs onEarth. He regenerated intoCho-Je, who had previously been active as a projection from his own mind.TV:Planet of the Spiders
PavoUnnumbered incarnationThe male ConstablePavo was shot bythe Monk, who used a perception-altering ring to pose as Pavo, while Pavo regenerated into a female incarnation with the aid of theSecond Doctor andJamie McCrimmon.AUDIO:The Black Hole
AillaUnnumbered incarnationAccidentally shot byKoschei while he was fighting with Imperial forces in theDarkheart; although badly injured and apparently dead due to assuming that she was only human, she was able to survive in her damaged body until she returned toKoschei's TARDIS and regenerated in theZero Room.PROSE:The Dark Path
RallonFirst incarnationInitiated all twelve of his regenerations at once to forcethe Toymaker out of his body; his previously-manifested Watcher subsequently merged with the Toymaker to keep him in check in the future, theFifth Doctor noting that this would mean that the Toymaker himself had essentially regenerated as a person.PROSE:Divided Loyalties
RocheUnnumbered incarnationCaught in atraffic accident while on Earth; he retained enough control over the process after it began to deliberately shape his new appearance so that he was the exact duplicate of theThird Doctor.PROSE:The Suns of Caresh
TaurasUnnumbered incarnationAttempting to free Omega from his anti-matter universe, Tauras regenerated after he was shot byNarvin.AUDIO:Intervention Earth
JanartisUnnumbered incarnationAttacked bypig-rats and K9's stun laser and forced to regenerate. But, because he was infected by theDogma Virus, he became a pawn forFree Time.AUDIO:Panacea
AzmaelThirteenth AzmaelIn his thirteenth and final body, Azmael deliberately regenerated past his limit, killing himself, but alsoMestor, who had been attempting to possess Azmael's body after his own was destroyed.TV:The Twin Dilemma
The RaniMrs FloodAfter her doublebrainstem was frozen as a result of being sucked intospace, Mrs Flood split off fromthe new Rani in abi-generation.TV:The Interstellar Song Contest[+]Loading...["The Interstellar Song Contest (TV story)"]
Iris Wildthyme"Beryl Reid" IrisRegenerated into the"Jane Fonda" Iris after a lengthy illness caused by eating aDalek mutant raw.PROSE:The Scarlet Empress
The MultitudeThe EightBadly injured while helping theEighth Doctor andRiver Song resist a telepathic attack fromthe Clocksmith, he went intothe Doctor's TARDIS and regenerated intothe Nine.AUDIO:The Doomsday Chronometer
The ElevenKilled when he attempted to propose an alliance between himself and three incarnations ofthe Master after the failure of his prior alliance with theRavenous; denouncing the Eleven as a twisted lunatic, the three Masters shot him and expelled him from their TARDIS with only a vortex manipulator, whereupon he regenerated intothe Twelve.AUDIO:Day of the Master
VerneFifth-to-last incarnationAfter voting for the side opposing those who had sponsored his rise to power, Verne was caught up in a fight and was so badly injured that he was forced toregenerate into an incarnation that had a plain face and a laughably high voice.PROSE:The Twin Dilemma
Fourth-to-last incarnationWilled himself to regenerate again immediately after his previous regeneration, finding his new body less than satisfactory — resulting in a body that was a deformed, elderly man.
Third-to-last incarnationWilled himself to regenerate again immediately after his previous regeneration, finding his new body less than satisfactory — resulting in a body that was an amorphous blob.
Second-to-last incarnationWilled himself to regenerate again immediately after his previous regeneration, finding his body less than satisfactory — resulting in a monstrous inhuman form which theLord President had destroyed.
High TutorAlbrechtUnnumbered incarnationRegenerated as a result of an experiment byTheta Sigma involving aperigosto stick and atemporal feedback loopPROSE:The Time Lord Letters
IntrepidFirst incarnationIntrepid's first body failed at an unusually young age because, as ahuman-Homeworderhybrid, "her body was fighting itself". She was thus forced to "renew" herself.PROSE:Going Once, Going Twice
Unnamed House Military memberSecond-to-last incarnationRegenerated against her will into a monstrous form after receiving mortal wounds to her stomach at theBattle of Cratosi Fields. The resulting incarnation was erased from time alongside everything else at theFirst Auction in Heaven.
KallixUnnumbered incarnationRegenerated after theDaleks attacked theNeverwhen.AUDIO:The Neverwhen
TraveFemale incarnationShot byGaal after finding out he was a traitor atOutpost Delta.AUDIO:Enemy Lines
LarissaUnnumbered incarnationRegenerated after being shot in the abdomen byDoctor Bendo.PROSE:Newtons Sleep
ChatelaineThessaliaImperator Presidency-era incarnationForced herself to regenerate afterthe Imperator's trial by putting agun in her mouth and committingsuicide.PROSE:The Book of the War,Newtons Sleep
Unnumbered incarnationRegenerated again, growing younger and taller, sometime before recruitingLarissa to theOrder of the Weal. Larissa speculated this occurred during theworldquake or thegoblin infestation.PROSE:Newtons Sleep
The GeneralEleventh GeneralAfter tricking theTime Lords into savingClara Oswald with anextraction chamber, theTwelfth Doctor tried to flee with Clara and armed himself withthe General's sidearm. As the gun had no stun setting, the Doctor shot the General, though only after he confirmed that he had not yet completed his regeneration cycle. The shot resulted in the General's immediate regeneration.TV:Hell Bent
OllistraUnnumbered incarnationPushed off a building inNew York City bythe Eleven.AUDIO:The Side of the Angels
KarlaxUnnumbered incarnationForced to regenerate by being exposed to thespacevacuum afterDalek stealth ships destroyed hisBattle TARDIS during theLast Great Time War.PROSE:Engines of War
RuathSecond incarnationDrained every drop of her own blood from her body to restoreVampireLordYarven. Yarven subsequently turned her new incarnation into a vampire.PROSE:Goth Opera
OphiuchusUnnumbered incarnationDying from an unknown cause, Ophiuchus was saved by theFifth Doctor, who gave him a "little push" having been convinced by Nyssa and Tegan and regenerated.COMIC:Ophiuchus
InnocetUnnumbered incarnationAfter staying in the same body for over six hundred years, Innocet was killed by aQuences-possessedBadger to protect the Doctor and regenerated into a new, younger incarnation.PROSE:Lungbarrow
GlospinUnnumbered incarnationForce-regenerated himself into the double of theFirst Doctor after acquiring a genetic sample to influence the appearance of his next incarnation.
"First Doctor" incarnationHaving killedQuences while disguised as the Doctor, Glospin regenerated again to conceal his role in the murder.
CavisLast incarnationBegan to regenerate after she was decapitated by Queen RegentMab, although Mab stabbed her in both hearts, halting the process and ensuring that Cavis stayed dead.PROSE:The Shadows of Avalon
GandarUnnumbered incarnationStabbed in the heart byMargwyn, but regenerated as Margwyn missed his second heart.
Unnumbered incarnationGandar regenerated again shortly after his previous regeneration when he received a fatal sword wound; his new incarnation resembled a hybrid of human andSilurian and was far more peaceful than his previous violent selves.
Epsilon DeltaFirst incarnationA run-in with someSontarans triggeredEpsilon Delta's first regeneration.PROSE:The Dimension Riders
LouisFirst incarnationLouis' first regeneration was triggered by astaser-gun blast inflicted byRigan.AUDIO:Unregenerate!
Surgeon-MasterElbonUnnumbered incarnationShot by a servitor thatIrving Braxiatel placed inthe TARDIS thatRomana II used whilst trying to bring a pair ofPig-rats back toGallifrey. His next incarnation was hijacked by theDogma Virus.AUDIO:Panacea
The MinisterUnnumbered incarnationAssassinated while under the name of Prime Minister Felicity Morgan.AUDIO:The Same Face
AndredUnnumbered incarnationBadly wounded after a shootout withTorvald.AUDIO:A Blind Eye

Parallel universes[[edit] |[edit source]]

IndividualIncarnationDetailsSources
"Inferno Earth" counterpart tothe Doctor"Inferno Earth" Second DoctorForced to change his appearance for the same reasons as his counterpart. Unlike his counterpart, however, he pickedone of the faces theTime Lords offered him.PROSE:Timewyrm: Revelation
Unbound Universe counterpart tothe Master"Exiled" Unbound MasterWounded in a plane crash and regenerated intohis next incarnation due to his injuries.AUDIO:Sympathy for the Devil
"DEEP universe" counterpart to the DoctorThe DoctorHad hisneck broken by GeneralFlint.AUDIO:Full Fathom Five
New DoctorEmerged from his regeneration only to be immediately shot dead byRuth Mills.
"Exile Universe" counterpart to the Doctor"Previous Doctor"Committedsuicide by jumping off of apylon to escape theTime Lords. Hisnext incarnation was a woman.AUDIO:Exile
The Warrior's universe counterpart to the DoctorFourth DoctorExterminated by a surviving prototypeDalek after averting thecreation of the Daleks. His next incarnation fought in aTime War and chose to abandon the tile of "the Doctor", so he was known asthe Warrior.AUDIO:Dust Devil

Other regenerating individuals[[edit] |[edit source]]

The Doctor's universe[[edit] |[edit source]]

IndividualIncarnationDetailsSources
I.M. ForemanFirst twelve incarnationsAs a priest,I.M. Foreman had been given the gift of regenerations. This made twelve different individuals, who were created by his body absorbing theDNA around him; all regenerations were caused by theThird Doctor sending Foreman's first twelve bodies back to Gallifrey's past so that they fell from a great height, each regenerating into their next body, the trauma of the regeneration causing each incarnation to lose their memories.PROSE:Interference - Book One,Interference - Book Two
K9K9 Mark IRegenerated intoK9 Mark 2 using hisregeneration unit after being forced to self-destruct to protect somehumans fromJixen warriors.TV:Regeneration
Melody Pond"The Little Girl"As a little girl, Melody regenerated on the streets ofNew York City in1970 due to a terminal illness.TV:Day of the Moon
Mels ZuckerRegenerated inAdolf Hitler's private study in1938 after Hitler accidentally shot her while aiming for theTeselecta.TV:Let's Kill Hitler
Supreme Dalek and otherDaleks in theDalek City, including in thesewersAgeing original bodiesRegenerated into healthier, "more powerful" forms within theircasings afterDavros drained massive amounts ofregeneration energy from theTwelfth Doctor with the help ofColony Sarff and transmitted them into the hearts of every Dalek onSkaro.TV:The Witch's Familiar
BrookeBrooke 1Brook 1 regenerated for the first time after being shot byRiver Song.AUDIO:My Dinner with Andrew
LakeLake 1Lake's first regeneration was induced after he was mortally wounded by an unstablefuel cell.AUDIO:The Lady in the lake
Lake 2Willfully regenerated to test his ability to consciously base his appearance on people he had met before.
Lake 3Shot byRiver Song in revenge for his having killedLily, who, unbeknownst to both of them, was his own future self, and he regenerated into Lily.
WadiAll incarnationsWadi's regenerations were all expended through fatal injuries inflicted by Lake.
StreamMultiple incarnationsAs part of his religious cult, convinced byLake to die multiple times onTerminus Prime so he could covertly study regeneration and find out how many timesProto-Time Lords like himself were able to regenerate.
Beck
Creek
RindleFirst incarnationRegenerated after being mortally wounded by a wild beast.
Second incarnationRegenerated after being killed by Lake.
Third incarnationHad her remaining regenerations drained by Lake to power his ship.
TarnFirst eleven incarnationsDeceived by Lake into believing that regeneration was a constant rebirth, Tarn went toTerminus Prime to commit suicide so he could continually beborn again. By the time he met River, he had already died eight times. He was killed again byKevin and then again byDave, regenerating at least ten times.
ACyberMasterFirst CyberMaster incarnationShot by one of its fellow newly-created CyberMasters on the order ofthe Spy Master, so as to "test out" the regenerative abilities of the new species in front of theThirteenth Doctor.TV:The Timeless Children
SwarmOld SwarmTriggered a regeneration from his old, decrepit body into theYounger Swarm by absorbingEn Sentac's life forceTV:The Halloween Apocalypse
MalikaFirst incarnationSentenced to death by firing squad byOxirgi.COMIC:Omega,AUDIO:Omega
Second incarnation