The Doctor was a renegade Time Lord from the planet Gallifrey who, as a voluntary exile from his homeworld fought injustice where he found it. Alone among the Time Lords, he survived the Last Great Time War with the Daleks. Throughout his life, he had a particular association and affinity with the planet Earth and its Humans.
Through the power of regeneration, the Doctor's personality and outer form has greatly changed over time, although all his incarnations are essentially the same person. He continues to be a heroic figure, fighting the evils of the universe wherever he finds them, even if his values and motives are sometimes alien to Humankind. To date, the Doctor has had ten incarnations:
- The First Doctor was a somewhat unreadable, guarded figure, irascible, protective of young women who reminded him of his grand-daughter Susan, a brilliant but often short-tempered scientist and a keen strategist. Though far from invulnerable, he usually ran rings around lesser intellects.
- The Second Doctor was warm and wise, a sort of 'cosmic hobo', often as frightened of the alien menaces he faced as those around him. Often overtaken by events, he improvised his way out of trouble — but he also had a manipulative streak about him, too.
- The Third Doctor cut more of a dashing figure than his predecessors, a dandy with a penchant for gadgets and martial arts, particularly Venusian aikido. His difficult relationship with the Brigadier softened to an easy mutual trust. He had a personal arch-enemy, the Master. Due to his exile by his own people, he spent most of his life on Earth.
- The Fourth Doctor was something of a cross between Willy Wonka and the Mad Hatter, rarely without his signature scarf of incredible length. He was perhaps the most eccentric incarnation and progressed from bohemian vagabond to manic scatterbrain to a more mature and sombre figure.
- The Fifth Doctor had a fondness for cricket. He was somewhat more nervous and less sure of himself than the two previous Doctors, though all the more heroic because of it. Like the Second Doctor, he often found himself backed into a corner and had to figure out a way back once more.
- The Sixth Doctor, grandiose and eloquent, sported a multi-hued wardrobe that looked as if designed by Christian Lacroix, had a manic personality and an acerbic wit which could shade into moral passion. He loved a good quote and rarely got caught off-guard by an enemy.
- The Seventh Doctor, his voice touched by a Scottish burr, combined the vagabond nature of the Second and Fourth Doctors with the scientific brilliance of the First and Third incarnations. Armed with a keenly tactical mind, his personality deepened and darkened. He seemed, often, a demi-god walking amongst lesser beings, letting his companions know little, an avenging angel driven to eradicate evil at any cost. Of all the Doctors, he had arguably the most complex personality.
- The Eighth Doctor showed a romantic and sensitive side not evident in the previous Doctors. More morally flexible than his predecessor, this Doctor suffered bouts of amnesia, first after his initial regeneration and again after the first destruction of Gallifrey following the the War with the Enemy.
- The Ninth Doctor, now a survivor of the Last Great Time War, displayed much of the playfulness of the Fourth and early Seventh Doctors, but also displayed a pragmatism which could at times appear callous. This Doctor also seemed very conscious of the effects his actions had on those around him. His attire was also considerably more conservative and less conspicuous than those of his predecessors and his accent and attitude more working class.
- The Tenth Doctor's character was manic, that of an eccentric crackpot, a cross between the Fourth Doctor and the Ninth, with hints of the Seventh with the style of the Fifth and a fondness for Human pop culture reference. He had a serious side, but quite often his other wins out. He can act with inhuman ruthlessness.
