Sixth Doctor

BACKSTORY.

As loud in clothing as he was in voice, the Sixth Doctor would often browbeat others into submission with his savage wit and grammarian's interest in language. Passionate, warm and virtuous, the Doctor held a thunderous and turbulent exterior that initially manifested as righteous indignation or smug self-satisfaction, but, as he acquired a larger entourage of companions, he mellowed out of his faults and became a man of genuine zest and charm.

He was profoundly difficult with his first companion, Peri Brown, even strangling her out of sheer paranoia mere hours after his regeneration. While their relationship remained vitriolic during their adventures on Telos and Varos, the Doctor's affirmation on Peri's importance to him during their battle against the First Rani and the Tremas Master at Killingworth proved that he was someone she could rely upon, even if he indulged in more extreme solutions, such as killing the Androgum Shockeye in an act of pure self-preservation. While taking some solo adventures to mellow out of his violent tendencies, the Doctor faced Davros again and also briefly reunited with Tegan Jovanka, with him and Peri later meeting H. G. Wells during an adventure on Karfel and stopping Davros' schemes at Tranquil Repose.

Further adventures to the likes of Blackpool and Magnus improved their bond to the point that Peri looked to the Doctor for strength after her mother's death, which also untethered her from Earth and allowed her to devote herself to traveling in the TARDIS. Though they were duped by temporary companion Joe Carnaby into reviving his Were Lord brethren, the pair had a better relationship with their next companion, the Whifferdill Frobisher, whom the Doctor met while Peri was staying in 1985 New York City, though he chose to leave the TARDIS sometime after they saw Jamie McCrimmon die fighting the Cybermen.

The Doctor and Peri continued to travel together until they were separated shortly after their trip to Ravolox, when the Doctor was forced to stand trial against the Time Lords in an impartial inquiry on his character, where his prosecutor, the Valeyard, showed him Peri being killed Thoros Beta. The Doctor tried to explain he would improve in the future by showing an adventure he would had with Mel Bush on the Hyperion III, only to then be charged with genocide against the Vervoids. However, the arrival of the Master showed the trial to be a farce orchestrated by the Timer Lords to discredit the Doctor, and also revealed the Valeyard to be a future personification of the Doctor himself, using the trial for his own agenda. After he managed to defeat the Valeyard, the Doctor was told that Peri was still alive, the reports on her death having been falsified.

Although he left the trial happy in the knowledge that Peri had married, the revelation that the Valeyard's dubious existence was tied to his own left the Doctor to fall into a depression and try to live reclusively, even when taking on companions such as Grant Markham and Mathew Sharpe, until the Fates reassured him that becoming the Valeyard was but one of many possible timeline restored him from his funk. Now seeking out Peri, the Doctor learnt that the Time Lords' manipulations on Thoros Beta had spawned multiple versions of her. He also spent time stranded in 1890s London, where he became reacquainted with Henry Gordon Jago and Professor George Litefoot, even taking them on a quick trip after retrieving his TARDIS.

During a visit to Sheffield Hallam University, the Doctor found himself being forced to take on history lecturer Evelyn Smythe as a companion, with her verbal dexterity being on par with his own. While being troubled again by Thomas Brewster led them to meeting Flip Jackson and Patricia Menzies, it was their battles with Nimrod and the Forge that saw the Doctor learn true humility from Evelyn when she confronted him on his flippant attitude towards death. Now reassured that the life he thought would be "short, but sweet", could progressed further, the Doctor continued to travel with Evelyn until she chose to settle down on Világ.

The Doctor's following adventures saw him reunite with Frobisher, befriend Jason, Crystal and Zog, briefly travel with UNIT operatives Will Hoffman and Emily Chaudhry, try to unravel the mystery of Charley Pollard until she was erased from his memory, and return to the Land of Fiction to help Zoe Heriot fend of the Cybermen with a fictional construct of Jamie.

As he was slowly manipulated by the Valeyard across different moments of his life, the Doctor found himself reuniting with Flip while stopping Davros from altering the Battle of Waterloo, and she joined him as a companion until she left to marry Jared Ramon just before the Doctor was rejoined in his travels by one of the versions of Peri. While traveling alone, the Doctor took on Bletchley Park WREN Constance Clarke as a companion, and they were swiftly joined by Flip when they found her in 1948 Vienna, with the trio forming the "TARDIS Gang".

Eventually, the Doctor found himself meeting Mel Bush at Pease Pottage during an Auton invasion, and invited her to join him as a companion, fulfilling the future he had seen at his trial. Although he was annoyed by Mel's insistence on making him exercise and maintain a diet, the pair came to form a close friendship as they voyaged to planets like Generios 1, Lethe and Oxyveguramosa. Their travels saw the Doctor reunite with Evelyn, and later be joined by one of her old students, Hebe Harrison.

Accounts vary on just how the Sixth Doctor regenerated, though they all agree that his final flight saw him and Mel drawn to Lakertya by the Rani. While one account depicted him suffering a fatal head blow when his TARDIS was suddenly ensnared in a tractor beam before he could activate the defences, two differing accounts would elaborate that the Doctor was manipulated into ensuring his own demise in the attack by the unborn Seventh Doctor and Fenric. A second account attributed his inability to survive the attack as being from fatigue after sacrificing his chronon energy to stop Monica Lamprey destroying the multiverse. A third account showed the Doctor having to arrange his own demise to prevent the Valeyard's plan to replace every Time Lord in existence by sending a message back down his timeline and coercing his younger self into entering the Lakertyan System and regenerating after being exposed to focused radiation beams that were fatal to Time Lords. Whatever the reasons, all accounts agreed that the Sixth Doctor regenerated into his successor once his TARDIS was forced onto Lakertya by the Rani.