Twelfth Doctor (Four Doctors)
After being "betrayed" by Clara Oswald, the Twelfth Doctor wandered the universe in search of Gallifrey, but instead found solace with the Voord, and then began a campaign to ensure his fallout out with Clara.
Biography
Original timeline
In the version of time where the alternate Gabby Gonzalez hailed from, the Doctor followed Clara to a café and barged in after his two previous incarnations had. The Tenth Doctor refused to consider the Twelfth Doctor as a possible incarnation of himself, as he had already confirmed the Eleventh Doctor as his successor, and knew that he had only one regeneration left. Although the Eleventh Doctor tried to break them up, the tenth and twelfth incarnations argued until they brushed fingers, causing a spark of the Blinovitch Limitation Effect, resulting in the appearance of the Reapers.
While the Reapers chased the Eleventh Doctor, the other two Doctors, Clara, Alice and Gabby ran back to the Eleventh Doctor's TARDIS, only to find the Reapers' presence had turned it into an empty shell. As the Eleventh Doctor returned, the three Doctors touched to send a narrow focus beam, docking their TARDISes together and restoring its exteriors. As the Reapers continued their pursuit, the group made their way to the Tenth Doctor's control room where the Twelfth Doctor set it to dematerialise, thus forcing the Reapers out. Although this worked, the Twelfth Doctor was worried about how his other incarnations would perceive his actions, to which Clara encouraged him to have some "me time" and to work things out. (COMIC: Four Doctors)
While Clara, Alice and Gabby were elsewhere, (COMIC: The Meeting) the three Doctors participated in an open microphone night, though the Twelfth Doctor left after the audience did not take to his set up, believing they should try karaoke. (COMIC: Open Mic Night) The Doctors also tried their hand at classical comedy, though the twelfth incarnation's sense of humour turned sour, to which the tenth incarnation turned apologetic for. (COMIC: The Doctors Do... Classic Comedy)
Back in Paris, Clara revealed that the three Doctors had had an encounter on the planet Marinus in the circumstances of a catastrophic event. Unable to contain their curiosity, the Doctors travelled to Marinus to find out what would happen, where, after they were attacked by a mysterious beam, the Doctors began bickering and inadvertently ended up in the pose from the photo. Forced to split up in a maze by their attackers, the Twelfth Doctor ended up with Gabby, who criticised him for his views on the others, while the Doctor defended himself as being more "wholemeal" than the "skinny, low carb, free range Doctor" she was used to.
Navigating the maze, the six met up at the middle of the maze, where a continuity bomb detonated and turned them all into time ghosts, travelling to different timelines made by the Doctors' decisions. These alternative timelines included one where the Tenth Doctor allowed Wilfred Mott to die in the radiation chamber, one where the Eleventh Doctor allowed River Song to spare him at Lake Silencio, and one where the Twelfth Doctor would become a paranoid recluse inside the TARDIS after a betrayal Clara had committed against him. In order to escape from the loop, the Doctors committed to the twelfth incarnation's future, as it seemed to be the least dangerous of the three. The alternative Twelfth Doctor was surprised to see Clara again, but recognised everyone else and agreed to give them a lift to a small pocket universe inhabited by the Voord. Upon arriving, the Voord offered the alternative Twelfth Doctor a capsule, and he revealed that he planned all of this from the start and that he was the leader of the Voord.
After the alternative Twelfth Doctor revealed how he found companionship and healing in the Voord city, and had arranged the meeting of the Doctors to ensure his timeline would be whole, he announced his intent to erase Gabby, Alice and their Doctors' memories of the event, but implant mental commands in the Twelfth Doctor and Clara's minds to ensure they would fall out in the betrayal, allowing the Twelfth Doctor to become his alternate self and lead the Voord on a universal conquest. As they were being led to have their memories altered, the Doctors staged a distraction, allowing Gabby and Alice to escape. The Doctors and Clara were then taken to the Conscience, where the alternative Twelfth Doctor altered their memories, and sent them back to their own universe to live out their new destinies.
As the alternative Twelfth Doctor gloated about his victory, Alice was killed by his Voord guards and Gabby was sent back down her own personal timeline by a Weeping Angel hidden in the Eleventh Doctor's comics package. Arriving at the café before the three Doctors appeared, Gabby warned the companions of what would occur if things went the way they had before, before fading from existence. (COMIC: Four Doctors)
A new timeline
Now prepared for his alternate counterpart's deceptions, the Twelfth Doctor led his past incarnations and their companions to Marinus to deliberately set off the continuity bomb and enter the Voord city through River Song's World. Once there, the Twelfth Doctor entered the Voord group mind, and was confronted by the alternate Doctor. The alternate Doctor was able to overpower his younger self, until the Twelfth Doctor called in the other Doctors to assist him. Learning that the Doctors had sabotaged the city's force field, the alternate Doctor was left with the choice of letting the Voord be destroyed or to use the Dalek weapon to regress their timeline, even though it meant erasing himself from existence. After Clara apologised to him, the alternate Doctor regressed the Voord's timeline, but did request for Clara to not forget him. (COMIC: Four Doctors)
