Second Doctor

The Second Doctor was the second incarnation of the Time Lord known as the Doctor. Though outwardly depicting himself as a warm, bumbling, almost clownish, buffoon, this Doctor possessed a darker, more cunning aspect to his personality, one which he usually kept hidden in order for him to carry out his plans successfully. Battling countless alien menaces throughout his lifetime, such as the Cybermen and Daleks, the Second Doctor developed a strong thirst for justice and righteousness. However, his actions were viewed upon by the Time Lords as in direct contrast to their Non-Interference Policy, and he was subsequently put on trial and exiled to the planet Earth in a new body as punishment.

New life
This incarnation began when the Doctor's first incarnation fell victim to old age after defeating the Cybermen and regenerated for the first time. (DW: The Tenth Planet) The Doctor found himself suspected as an impostor by his companion, Ben Jackson, although his other companion, Polly, seemed more ready to believe that he was in fact, still the Doctor. They were thrown into a battle with the Doctor's old enemy the Daleks, at the Earth colony on the planet Vulcan. The fact that the Daleks recognized the Doctor as their enemy convinced Ben of his credentials and by the end of this adventure, the Doctor had won over his trust. (DW: The Power of the Daleks)

Travels with Ben, Polly, Jamie and Victoria
Shortly, the trio met Jamie McCrimmon, in 1746 Scotland, and let him come along on their travels. (DW: The Highlanders) Together, on the Moon, they would fight a new, more machine-like form of Cyberman. (DW: The Moonbase)

Ben and Polly decided to stop off together on 1966. (DW: The Faceless Ones) The Doctor and Jamie found themselves transported back to 1866 where they found two 19th century Human scientists, Edward Waterfield and Theodore Maxtible, trying to isolate the Human Factor. Jamie and the Doctor befriended Waterfield's daughter, Victoria. Waterfield now having died, and the introduction of the Human Factor having instigated a war on Skaro, the Doctor and Jamie left with Victoria. The Doctor believed at the time that the Daleks had truly destroyed each other, forever. (DW: The Evil of the Daleks)

With Jamie and Victoria alongside him, the Doctor forced the Cybermen back to their ice tombs on Telos and first encountered the Cybermats. (DW: The Tomb of the Cybermen) On Earth, they had their first known encounters with the Robot Yeti, the Great Intelligence (DW: The Abominable Snowmen) and the Ice Warriors. (DW: The Ice Warriors)

During a second battle with the Great Intelligence and the Yeti, the Doctor met, for the first time, then-Colonel Alistair Gordon Lethbridge-Stewart. (DW: The Web of Fear)
 * Lethbridge-Stewart would later found UNIT and play a significant role in some of the Doctor's life.

The TARDIS landed once more on Vortis (MA: Twilight of the Gods) where the Doctor met, once again, Near Darkheart. They encountered the war-like Veltrochni and Koschei, an old friend of the Doctor's from Gallifrey, possibly sent by the Time Lords to retrieve him. (MA: The Dark Path)

Adventures with Jamie and Zoe
Craving peace and quiet, Victoria left the TARDIS crew to live with the Harris family. (DW: Fury from the Deep) The Doctor and Jamie discovered a Cyberman plot involving a space station and picked up one of the space station's crew, Zoe Heriot. To make sure that she really wanted to come with them, the Doctor showed her a mental projection of his last adventure with the Daleks in the year 1966. (DW: The Wheel in Space)

On the planet Dulkis, the Doctor, Zoe and Jamie first fought the Quarks. (DW: The Dominators). Shortly after an adventure in the Land of Fiction (DW: The Mind Robber) the travellers landed on Earth where they learned that Lethbridge-Stewart, now a Brigadier, headed a new alien defence organisation, named UNIT. Alongside UNIT, they defeated Tobias Vaughn and the Cybermen. (DW: The Invasion) Later they once more battled the Ice Warriors. (DW: The Seeds of Death)

Trial and its aftermath
The Doctor discovered a former friend, whom the War Lords referred to as the War Chief. He had given spacetime vessel technology to the War Lords, a race planning to use Human soldiers as an army to conquer the galaxy. The Doctor was forced to betray his location to the Time Lords in order to return the many soldiers kidnapped from various periods of Earth history. (DW: The War Games) The Doctor was captured and placed on trial for violating the cardinal rule of the Time Lords, never to interfere. His sentence would consist of exile on Earth in the 20th century and a forced regeneration. He is also given a choice of new appearance, but rejected all of the choices. The choice is finally made by the Time Lords. (DW: The War Games)

The Celestial Intervention Agency may have stepped in, secretly, to intercede and prevent the Time Lords from executing the Doctor, in return for the Doctor then working for them. (DW: The Two Doctors, PDA: World Game)
 * At some point, the Doctor did regenerate and the Doctor's exile commenced. According to at least one source, the exile on Earth occurred prior to his enforced regeneration, allowing the second incarnation to enjoy considerable luxury and fame on Earth. (TVC: Action in Exile)

Unrecorded Adventures

 * At some point before meeting the Brigadier the Doctor had an encounter with the terrible zodin (DW: The Five Doctors)
 * The Doctor and Jamie may have had at least one other adventure together before the Doctor regenerated.
 * A future incarnation of the Doctor, along with an older Jamie, fought the Cybermen on Marinus. (DWM: The World Shapers) Later, from the Cyber-Planner's point of view, the Cyber-Planner would refer to this. (DW: The Invasion)
 * Strangely, the Doctor later recalled the Cyber-Planner saying this even though he could not possibly have heard. (DWM: The World Shapers)
 * For a list of Second Doctor stories in the order in which he experienced them, see Second Doctor - Timeline.

Personality
This incarnation was a complete change of pace from his predecessor; whimsical, buffoonish and witty. The Doctor was no longer a grandfather figure, but rather more of a favourite uncle. Indeed, the slow transition of the first incarnation from a reluctant travelling companion to a more kindly compatriot was completed here, as the second incarnation very much enjoyed embroiling himself in adventures with his assistants.

Despite this incarnation's almost childlike recklessness, it was always clear to his allies that a keen, deliberate intellect lurked behind every action. Although the second incarnation frequently gave the impression that he never knew what he was doing, this was simply an affectation and an act put on to fool those who would underestimate him. He also had a warmer, gentler way about him than in his earlier incarnation.

Paradoxically, he had a deep streak of ruthlessness, particularly when dealing with a known adversary, such as the Cybermen, wiring the Tomb doors to fatally electrocute anyone trying to open them (DW: The Tomb of the Cybermen), steering an Ice Warrior fleet into the sun (DW: The Seeds of Death), or ensuring that a relatively helpless party of Daleks would all die. This action alienated Victoria, who felt disturbed to see this side of him. (DWM: Bringer of Darkness)

The Doctor also had a noticeably antagonistic relationship with his next incarnation on the occasions that they co-existed. Their relationship was so rocky and their personalities so different, that they seemed incapable of working together without the authoritative presence of the first incarnation. (DW: The Three Doctors, DW: The Five Doctors)

Skills and Abilities
This incarnation of the Doctor had a knack for playing the recorder. (DW: The Power of the Daleks, The Underwater Menace, The Three Doctors)

More seriously, he had a gift for diplomacy and winning others over to his side. This may have been the reason behind why he was sent by the Time Lords to Space Station Chimera to persuade Dastari to discontinue his time travel experiments. (DW: The Two Doctors) This particular facet of his personality enabled him to trick others into doing what he wished. For example he tricked Jamie to go through a series of tests designed to isolate the Human Factor. He was also able to trick the Daleks themselves into giving the Human Factor to test subject Daleks, and finally to administer the Dalek Factor to the Doctor himself, which he knew would only work on Humans. (DW: The Evil of the Daleks) In a similar way, he convinced the War Chief to regard him as an ally (DW: The War Games) and pretended to go along with the Great Intelligence's brain transference operation. (DW: The Web of Fear)

Combined with his skill for improvisation, it is clear why the Doctor considered himself a "genius". (DW: The Seeds of Death)

He possessed telepathic ability, including being able to sum up knowledge into a physical box and communicate it to the Time Lords. (DW: The War Games) He was also able to use the ability to show Zoe Heriot his previous adventure with the Daleks. (DW: The Wheel in Space)

Habits and Quirks
The second incarnation possessed a recorder, which he played to concentrate or while under stress. (DW: The Power of the Daleks onwards)

In Scotland, he posed as a German physician, calling himself Doktor von Wer (DW: The Highlanders) and in Atlantis he dressed as a strange, gypsy-like musician. (DW: The Underwater Menace) In most of these instances, he seemed as much motivated by the fun of doing it as much as for any practical purpose.
 * The alias "Doktor von Wer" translates in English to "Doctor of Who".

Taking events more seriously, he impersonated the murdered Earth Examiner. (DW: The Power of the Daleks) Against his will, he also impersonated Salamander, the Doctor's physical double. (DW: The Enemy of the World)

This Doctor introduced several qualities later picked up upon by future incarnations. The Doctor showed an interest in Tibetan Buddhism in this incarnation, although he referred to having made at least one prior visit to the a Tibetan monastery centuries before (which of his first two incarnations made that visit was unstated). (DW: The Abominable Snowmen) He also first revealed to his companions the Five Hundred Year Diary (DW: The Power of the Daleks), and his sonic screwdriver. (DW: Fury from the Deep) He had the ability to pull almost anything out of his pockets, much like later incarnations. (DW: The Five Doctors)

Mysteries and discrepancies

 * The Daleks on Vulcan recognise the Doctor in his second incarnation. (DW: The Power of the Daleks)
 * The Doctor showed a certain familiarity with the Cyber-Tombs on Telos. (DW: The Tomb of the Cybermen)

Appearance
The second incarnation dressed similarly to his earlier self, though in far less natty fashion. The trousers were clownishly large and the cravat was replaced with a bow tie. He quickly abandoned the blue signet ring as it no longer fitted him. In his first adventure on Vulcan he possessed a tall stove-pipe hat. (DW: The Power of the Daleks) He also early on expressed a liking for hats in general, stating about different head gear that he "would like a hat like that!" (DW:: The Highlanders) He also occasionally wore an over-sized fur coat. (DW: The Abominable Snowmen, DW: The Five Doctors)
 * The eleventh incarnation's outfit, specifically the bow tie, was based on the Second Doctor's outfit as the actor Matt Smith was inspired by him.

The second incarnation had longish, rumpled hair and blue eyes. Alternate accounts described his eyes as being 'soft chestnut brown' (ST: Pluto) and not long later they appeared to change colour several times alternating between blue, grey and green. (MA: Invasion of the Cat-People) At some point, his dark hair began to grey. (DW: The Two Doctors)

Behind the scenes
Rupert Davies, Valentine Dyall (later to play the Black Guardian and Slarn), and Michael Horden were all approached for the role of the Second Doctor. All declined, as they didn't want to commit to a long-running series.

Matt Smith, in preparation for his role as the Eleventh Doctor, watched the Troughton serial The Tomb of the Cybermen, and fell in love with it. He describes Troughton as "rather wonderful". Smith's costume and mannerisms are reminiscent of Troughton's.