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Having been gravely wounded in battle against the Cybermen aboard a Mondasian colony ship, (TV: The Doctor Falls [+]Loading...["The Doctor Falls (TV story)"]) the Twelfth Doctor eventually underwent his regeneration into the Thirteenth Doctor within his TARDIS. (TV: Twice Upon a Time [+]Loading...["Twice Upon a Time (TV story)"])
History[[edit] | [edit source]]
Foreshadowing[[edit] | [edit source]]
The Twelfth Doctor had previously faked this event with Nardole's help. The Twelfth Doctor would test if Bill Potts was under the influence of the Monks by gaslighting her into shooting him. She then did, proving she had free will, the Doctor added the pretend regeneration for a sense of theatre. (TV: The Lie of the Land [+]Loading...["The Lie of the Land (TV story)"])
Prolonged beginning[[edit] | [edit source]]
The Twelfth Doctor was electrocuted by a Cyberman while escaping Floor 1056 of the Mondasian colony ship. After making it to Floor 0507, the Doctor recuperated for two weeks, and his body began slowly dying, with Regeneration energy leaking from his hand at one point. The Doctor delayed the process, tired of "being someone else". During the subsequent battle against the Cybermen, the Doctor was gravely wounded by the Cybermen, being shot several times. When the regenerative process began, the Doctor elected to ignite the Floor, accepting his fate and that he had had "time enough".
The Doctor's body was taken to his TARDIS by Bill and Heather, and the regenerative process restarted. The Doctor still refused to accept the process (TV: The Doctor Falls [+]Loading...["The Doctor Falls (TV story)"]) until an encounter with his first incarnation, Archibald Hamish Lethbridge-Stewart and the Testimony caused him to concede that another regeneration would not "kill anyone". After taking a final look at the universe and providing advice to his next incarnation, the Twelfth Doctor regenerated inside his TARDIS in an explosive fashion. (TV: Twice Upon a Time [+]Loading...["Twice Upon a Time (TV story)"])
The change[[edit] | [edit source]]
As they regenerated, the Doctor relived memories from each of their past lives while the Twelfth Doctor continued to give advice, recalling the magnificence of their TARDIS, (COMIC: The Many Lives of Doctor Who) Ian and Barbara, (COMIC: The Path of Skulls) the strangeness of some of their adventures, (COMIC: Card Conundrum) their love for London (COMIC: Invasion of the Scorpion Men) and for parts of Earth outside the UK, such as New York City. (COMIC: Time Lady of Means) With the new incarnation becoming a certainty instead of a possibility, her actualised potential sent postcards to various friends as a "hello to the world", including V. M. McCrimmon and Grandfather Halfling in the City of the Saved (PROSE: Postscript) and Alistair Gordon Lethbridge-Stewart during his later years. (PROSE: When Times Change...) The Time Lords became aware of the regeneration, and would identify the Thirteenth Doctor as the current operator of the TARDIS in their TARDIS Type 40 Instruction Manual. (PROSE: TARDIS Type 40 Instruction Manual [+]Loading...["TARDIS Type 40 Instruction Manual (reference book)"])
As they continued the recollections, the Doctor settled into their new body. (COMIC: The Many Lives of Doctor Who) They next remembered Gallifrey and the regeneration limit, (COMIC: Ophiuchus) how the Sixth Doctor saved the Triumvirs from the Haxeen, (COMIC: Virtually Indestructible) the Master, (COMIC: Crossing the Rubicon) how things were not always as they appeared (COMIC: The Time Ball) and the Last Great Time War. (COMIC: The Whole Thing's Bananas)
As the regeneration finished, the Doctor noticed that her clothes no longer fitted and felt "there was something different about this body". (PROSE: Twice Upon a Time) After the Twelfth Doctor's ring fell off her finger, (TV: Twice Upon a Time [+]Loading...["Twice Upon a Time (TV story)"]) the Doctor remembered how the Ninth Doctor had to relearn to be "the Doctor" after the Time War, (COMIC: Return of the Volsci) how the Tenth Doctor helped Elizabeth Garrett Anderson become the first female doctor in England, (COMIC: Nurse Who?) her wife River Song, (COMIC: Without a Paddle) the Daleks and how they were a constant threat throughout her life, how she lost Bill Potts to the Cybermen, and, finally, how her predecessor was critically injured in the Battle of Floor 0507, which led to the regeneration she was now finishing. (COMIC: Harvest of the Daleks)
Aftermath[[edit] | [edit source]]
As recorded in the TARDIS Type 40 Instruction Manual, the destructive nature of the Twelfth Doctor's regeneration compared to the First Doctor's regeneration was acknowledged by the Time Lords, leading to an investigation by the Black Hole Shipyards. (PROSE: TARDIS Type 40 Instruction Manual [+]Loading...["TARDIS Type 40 Instruction Manual (reference book)"])