Second Doctor

Though outwardly warm, bumbling, and clownish, the Second Doctor also had a darker, more cunning aspect to his personality — one which he usually kept hidden in order to carry out his plans. Regenerating when his first incarnation gave in to old age and fatigue following his fight with the Cybermen, this new incarnation was the product of the Doctor's first regeneration.

He travelled with a number of companions, starting with his previous incarnation's last companions, Ben Jackson and Polly Wright, before adding Highland Scot Jamie McCrimmon to the TARDIS. After a while, Ben and Polly left, to be replaced by Victoria Waterfield, a woman orphaned by the Daleks. In time, she too left, and the Doctor made a new friend in the mentally gifted Zoe Heriot. At some point, he also travelled with his grandchildren, John and Gillian.

His adventures came to an end when he called on his people for help with the evil machinations of the War Lord. Though the Time Lords did indeed render assistance, they also condemned him to exile on Earth and a new body for breaking their non-interference policy many times over. The Celestial Intervention Agency was able to stay the execution of this sentence for a while in exchange for the Doctor providing his services to them. During these later years of his life, the Second Doctor variously carried out covert operations for the CIA and lived in luxury and fame in the heart of 1960s London. Eventually, though, Time Lord justice reasserted itself, and the Doctor was indeed forced to regenerate into his third body.

Near-miss
The First Doctor nearly regenerated during a surgery by Aldridge to replace his hand after he lost his original hand to the Soul Pirates. (PROSE: A Big Hand for the Doctor)

Post-regeneration
After having the "stuffing knocked out of him" fighting the Cybermen in Antarctica, (COMIC: Blood and Ice) the Doctor regenerated on the floor of his TARDIS, his appearance changing into that of a much younger man. (TV: The Tenth Planet) After the regeneration, which he referred to it as a "renewal", was completed, the new Doctor found himself suspected as an impostor by Ben, this being due to the Doctor failing to inform his companions of the Time Lord's ability to regenerate, while Polly was more ready to believe that he was the same Doctor.

Before he had time to recuperate, the TARDIS took the Doctor, Ben and Polly to Vulcan, where the Doctor witnessed the murder of an Earth examiner sent to check on the human colony. Posing as the examiner, the Doctor tried to stop the colony's scientist, Lesterson, from reactivating three captured Daleks, but failed. He was sceptical when the Dalek claimed to be the colony's servant and desperately tried to convince the humans that the Daleks were using their colony to produce new Daleks. By the time Lesterson uncovered the truth, it was too late: Thousands of Daleks, now showing their true colours, attacked the colony and killed many colonists. Despite knowing it was a losing battle, the Doctor, Ben and Polly remained to fight alongside the colonists, with the Doctor destroying his foes by using their power against them, and exposing secruity head Bragan as the killer of the examiner. (TV: The Power of the Daleks)

Soon after regenerating, the Doctor met Lilith on Kirith, when the Timewyrm had been recuperating in his mind since his regeneration. However, the Timewyrm passed from the Doctor to Lilith, leading to trouble for the Doctor in the future. (PROSE: Timewyrm: Apocalypse)

A changed man
The new Doctor, Ben and Polly subsequently travelled for three weeks, where they encountered Cat-People and Euterpians in 1994, (PROSE: Invasion of the Cat-People) and met Draconians, Alpha Centaurans, Venusians and Selachians in the Hotel Galaxian. (PROSE: The Murder Game)

The Doctor landed the TARDIS on an alien planet to let Ben go jogging, whilst he and Polly took a stroll and were chased back to the TARDIS by a mechanical Grasshopper. (PROSE: The Sour Note) The Doctor, Ben and Polly then visited Trefus, where they discovered blonde-haired people were considered inferior to those with dark hair. The Doctor defended the blonde-haired people to the ruler of the planet, who tested them to prove their innocence by swimming in a lake filled with crocodiles, which they won and were accepted into society. (COMIC: The Tests of Trefus)

After landing on an Arcturian spaceship under the impression it was hostile, the Doctor was greeted by a peaceful species from Arcturus, who had fled from their own planet after losing the atmosphere. Knowing humanity would consider them a threat and fight them, the Doctor altered their time co-ordinates and transported their fleet to the Ninth Dimension, where they could find a new world to call home. (PROSE: Only a Matter of Time) The Doctor, Ben and Polly next travelled to the "planet of Light", before an eclipse that plunged the planet into darkness began. Teaming up with an ancient resident called Igor, the Doctor helped the citizens overcome their fear of the dark, and parked the TARDIS in orbit as the planet of light fell into darkness. (PROSE: World Without Night)

Soon, the trio met Jamie McCrimmon in Scotland on 16 April 1746, and invited him to come along on their travels. (TV: The Highlanders) They travelled to Atlantis and defeated Professor Zaroff's plan to destroy the Earth, (TV: The Underwater Menace) fought the Cybermen on the Moon, (TV: The Moonbase) and encountered the Macra on an Earth colony. (TV: The Macra Terror) They then went to Vichy France in February, 1944 (AUDIO: Resistance) and met the Vist. (AUDIO: The Forbidden Time) While borrowing money from a bank, they meet the Selachians again. (AUDIO: The Selachian Gambit) Then, they went to a space Casino, where the Doctor met the Sidewinder Syndicate. (AUDIO: House of Cards) During this time, the Doctor encountered Oliver Cromwell in England, 1648. (PROSE: The Roundheads)

Next, the group met and defeated the Chameleons at Gatwick Airport on 20 July 1966. After realising that they had arrived home on the same day they had originally left, Ben and Polly decided to end their travels with the Doctor and remain on Earth in 1966. (TV: The Faceless Ones)

Looking after Victoria
After the TARDIS was stolen at the behest of the Daleks, the Doctor and Jamie found a Time corridor and were transported back to 2 June 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. After Waterfield died, and the introduction of the Human Factor into some Daleks having instigated a civil war on Skaro, the Doctor and Jamie left with Victoria, believing the Daleks had destroyed each other. (TV: The Evil of the Daleks)

With Jamie and Victoria alongside him, the Doctor saw an archaeological team on Telos open a Cyber-tomb. Eric Klieg awakened the Cybermen and the Cyber-Controller from their five-hundred year slumber, but the Doctor and Jamie sealed them away again. The Doctor electrified the entrance, the hatch leading to the tombs and the Symbolic Logic controls to prevent anyone else from entering. (TV: The Tomb of the Cybermen)

On Earth, the Doctor fought against the Robot Yeti, the Great Intelligence, and the Ice Warriors, (TV: The Abominable Snowmen, The Ice Warriors) and befriended Stuart Mallory, a distinguished naturalist, with whom he and his two companions later took dinner. (PROSE: The Last Emperor)

Reunited with Edward Grainger, the Doctor discovered a slave race called the Virtors had been transporting New York Supplementary Education Institution students back to their home world of Virtus. He prevented them from capturing Victoria, Jamie and Edward, but accidentally fell into their portal to Virtus himself.

Trapped on Virtus for a long period of time, the Doctor led a slave rebellion and, eventually, led the ageing humans back home, merely seconds after he had originally left from Earth's prospective. (PROSE: The Lost)

The Doctor visited East Ridge, where he helped a farmer called Thomas Watson to protect his family's farm from ruthless New York businessman, John Glassman, turning the whole town against the Watsons. The Doctor, Jamie and Victoria managed to expose John's dishonesty to the town's sheriff, which saved Watson's farm and place within the town. (PROSE: The Farmer's Story)

The Doctor next met a double of himself in dictator Ramón Salamander. (TV: The Enemy of the World) During a second battle with the Great Intelligence, the Doctor made the acquaintance of Alistair Gordon Lethbridge-Stewart. (TV: The Web of Fear)

Returning to 1960s London weeks after the Yeti invasion, the Doctor discovered a robot duplicate of Edward Waterfield had been created by the Daleks to exact revenge on him for destroying them in the 19th century. (PROSE: Father Figure)

After the TARDIS landed once more on Vortis, (PROSE: Twilight of the Gods) the TARDIS crew travelled near the Darkheart. They encountered the war-like Veltrochni and Koschei, an old friend of the Doctor's from Gallifrey, travelling with Ailla. However, the temptation posed by the Darkheart device proved too much for Koschei, and the revelation that his companion Ailla was a spy destroyed the last traces of good in him, and he became. (PROSE: The Dark Path) Craving peace and quiet, Victoria left the TARDIS crew to live with Frank and Maggie Harris after an adventure on a Euro Sea Gas refinery with a weed creature. (TV: Fury from the Deep)

Jamie and Zoe
The Doctor and Jamie fought the Cybermen on Space Station W3 and one of the space station's crew, scientist Zoe Heriot, stowed away aboard the TARDIS. (TV: The Wheel in Space)

On the planet Dulkis, the Doctor, Jamie and Zoe fought the Quarks, (TV: The Dominators) and, after an adventure in the Land of Fiction, (TV: The Mind Robber) defeated Tobias Vaughn and the Cybermen, with the assistance of the newly-promoted Brigadier Lethbridge-Stewart. (TV: The Invasion)

Briefly returning to the Land of Fiction, the Doctor discovered a Time Lord named Goth disguised as Lemuel Gulliver. Goth claimed a great crisis was about to befall Time Lord civilization, and persuaded the Doctor to help his successor stop Omega from ripping reality apart. (PROSE: Future Imperfect) The Doctor was time-scooped to his TARDIS in the future, where he reunited with the Brigadier and his other UNIT friends. He also encountered Jo Grant, a future travelling companion, and traded barbs with his future self. Ultimately, the two incarnations of the Doctor were able to work together when they and their UNIT friends were transported to an antimatter universe, despite their differences, and successfully thwarted Omega's escape — but the price was the loss of his recorder. After this, the Doctor said his farewells to his future and was returned to Jamie and Zoe. (TV: The Three Doctors) Although his memories of meeting his future self quickly faded, the Doctor did remember that he had lost his recorder, and went to a music shop on Amber Station to get a new one. (PROSE: Briefly Noted)

In Scandinavia, during the Dark Ages, Jamie was wounded by a vicious barbarian called Vignor. The Doctor and his friends were saved by Bior and joined his tribe. The Doctor soon discovered Bior was using magic to transform himself and his tribe into bears to protect their village. When Vignor attacked the village and killed Bior's younger son, Bior went on a vengeful attack, slaughtering men, women and children. The Doctor was forced to trap Bior in his form as a bear forever after he killed Vignor. (PROSE: That Which Went Away)

Unimpressed by Zoe's haughty demeanour, the Doctor took her to Los Angeles in 1999 at Christmas to teach her a lesson in humility. They helped to provide food, drink and shelter for the homeless and the poor. (PROSE: Goodwill Toward Men)

They visited Bob Dovie at 59A Barnsfield Crescent in Totton, Hampshire on 23 November 1963. (AUDIO: The Light at the End)

The Doctor, Jamie and Zoe visited a space ship that was being attacked by snake-like creatures, and the Doctor defeated them by playing his recorder. (COMIC: The Forgotten) They also freed the Gonds from the evil of the alien Krotons, (TV: The Krotons) and once more battled the Ice Warriors, preventing them from turning Earth into their new home through spores. The Doctor was nearly killed by one of these, but worked out their weakness to water. (TV: The Seeds of Death)

When Jamie and Zoe were imprisoned in an alien prison disguised as an English country home, the Doctor allied with gentlemen thief, Lucas Seyton. They infiltrated the prison and, after being reunited with his friends, the Doctor closed the prison down. (PROSE: Fallen Angel)

The group landed in the Frenko Bazaar, a famous intergalactic trading post where one could buy "just about anything". The Doctor, in an attempt to take down the slave market, placed a homing device on Jamie, and followed some Voraxx into Stellar Imports & Exports to gain their attention. A member told the Doctor that Jamie, coming from the past, was worth a mint. When he said Jamie wasn't for sale, the Voraxx members followed them.

The Voraxx kidnapped Jamie, and took him aboard a slaver ship in orbit. Following Jamie's signal, the Doctor and Zoe found the trans-mat that led to the ship and found Jamie. They then awoke some Ice Warriors, who started an uprising. The slaves took over the ship, forcing the slavers to leave. As the trio teleported back to the shop, the Doctor was shocked to find his companions missing, having been captured by Adam Mitchell. (COMIC: Prisoners of Time) After regaining his companions, the Doctor encountered space pirates. (TV: The Space Pirates)

Trial
The Doctor encountered another Time Lord, whom the War Lords, a race planning to use human soldiers as an army to conquer the galaxy, referred to as the War Chief and learned that he had given space-time vessel technology to them. Unable to return all the soldiers kidnapped from various periods of Earth history to their correct places in time and space, the Doctor called the Time Lords for help with a Hyper cube, thereby betraying his location to them.

The Time Lords captured the Doctor and placed him on trial for violating the non-interference policy of the Time Lords. Jamie and Zoe were taken away from him and had their memories of the time they spent travelling with him removed, save for their first adventure. After showing that his interfering with time actually helped prevent evils such as the Daleks, Cybermen and Ice Warriors from gaining significant power, his sentence was handed down. He was to be exiled to Earth in the 20th century with a forced regeneration. He was given a choice of new appearance, but rejected all of the choices. At wits' end, the Time Lords chose his new face for him and sent the protesting Doctor away to begin his exile. (TV: The War Games)

Working for the CIA
Before the sentence could be carried out, the Celestial Intervention Agency interceded, turning the Doctor into their "hired gun". In his first mission, he met the Players, an experience that resulted in the death of his assistant, Serena, and left his hair temporarily grey.

Using Serena's death as blackmail, the Doctor convinced Sardon to let Jamie travel with him again. Sardon conceded, altering Jamie's memory to believe Victoria was away studying graphology. (PROSE: World Game)

The Doctor's next mission took him to Space Station Camera, where he was to persuade his old friend, Joinson Dastari, to stop his scientists' experiments with Time, but Dastari and his mutated Androgum, Chessene, had planned to kidnap the Time Lord emissary all along, partnering up with the Sontarans to steal the secret of Time Travel from the Time Lords' genetic makeup. The Sontarans slaughtered the station and the Doctor's death was faked to hide his kidnapping and seclusion in Seville from survivors, such as Jamie, who escaped the massacre and reported everything to the sixth incarnation of the Doctor and Peri when they discovered him. The combined efforts of the four put a stop to the dangerous plans, but not before the Second Doctor was briefly turned into an Androgum. (TV: The Two Doctors)

The Doctor and Jamie then had further adventures, including investigating Helicon Prime and the murderous Mindy Voir. (AUDIO: Helicon Prime) They next travelled to Earth in 54,010 and rescued a tribe of Stone Age humans from a bio-dome. (PROSE: All of Beyond)

While the Doctor repaired the TARDIS, Jamie was secretly given the Necronomicon by, who was working with the Archon, who wanted to seize a TARDIS to attack the Time Lords. The Necronomicon transported the Doctor and Jamie to the Great Desolation, where the Doctor defeated the Archon by playing his recorder, whilst Jamie played the Bagpipes, which confused and destroyed the Archons. (PROSE: The Nameless City)

John and Gillian
Leaving Jamie in 1967, (COMIC: Invasion of the Quarks), the Doctor reunited with his two grandchildren, John and Gillian, and saved every planet in the universe from being attacked by missiles that had been programmed by the Extortioner in his scheme to hold every goverment in the universe to ransom. (COMIC: The Extortioner)

Taking John and Gillian in the TARDIS with him, the Doctor planned to sign a peace treaty with the Trods of Trodos. However, he found that he had been lured into a trap by the Daleks. Escaping before they could kill him, the Doctor allied with surviving Trods to free Trodos from Dalek control. (COMIC: The Trodos Ambush)

Leaving Trodos, the Doctor found a Dalek ship was chasing his TARDIS through the time vortex, which eventually forced him to return to 22nd century Earth at the height of the Dalek Empire. He disguised himself as a Dalek and foiled Dalek Supreme's plot to create thousands of Daleks. When he was detected, the Doctor used his disguise to trick all Daleks into destroying each other, before making a quick exit in the TARDIS with his grandchildren. However, he Dalek Supreme survived the attack, and swore revenge on the Doctor. (COMIC: The Doctor Strikes Back)

Not long after their encounter with the Daleks, the Doctor and his grandkids returned to 1960s Earth and stopped the Zagbors from converting humanity into human robots. (COMIC: The Zombies)

Attempting to test his newly invented ray gun, the Doctor landed his TARDIS in a swamp, where he and his grandchildren were hunted down by spiders, under the command of the Master of Spiders. (COMIC: Master of Spiders)

Taking John and Gillian to another alien planet, the Doctor re-encountered the Daleks and destroyed the Exterminator, a powerful weapon capable of destroying Earth with a single blast, instead using the weapon to destroy a spate of Dalek saucers. (COMIC: The Exterminator)

The Doctor next took John and Gillian to the Grand Museam in 1960s New York, where they worked with the Military to destroy three dinosaurs. (COMIC: The Monsters from the Past)

The Doctor and his TARDIS later became the god of a South American tribe after he, John and Gillian saved the tribe from warriors and their ruthless god, Madar. (COMIC: The TARDIS Worshippers)

The Doctor and his grandchildren became caught up in Space War Two in the 30th century, which was being fought between humanity and the robots of Veno. Although he couldn't end the war, the Doctor stopped a vengeful renegade human, Arborge Quince, from creating his own army of robots to attack Earth. (COMIC: Space War Two)

He next took John and Gillian to a cricket match in Egypt in 1880, where the TARDIS was stolen by Arabs working for Mahadi. He failed to stop them attacking a British outpost when he was taken prisoner by the British on suspicion of being a spy. Escaping, he retrieved his grandchildren and left in the TARDIS. (COMIC: Egyptian Escapade)

A few days later, the Doctor investigated a crashed ship on Minot and discovered a small group of Cybermen had possession of a bomb that they planned to use to destroy Earth. Setting the bomb to destruct earlier than intended, the Doctor accidentally became trapped on the Cybermen's ship as it hurtled through space. Luckily, he managed to contact his grandchildren on Minot and escaped in the TARDIS before the ship exploded and killed all the Cybermen aboard. (COMIC: The Coming of the Cybermen) In Arizona, the Doctor was kidnapped by foreign agents trying to wreck the testing on American planes. However, he managed to escape by crashing a jet packed with explosives into their base, killing the agents. (COMIC: The Faithful Rocket Pack)

The Doctor, John and Gillian next saved Professor Gnat from the Cybermen by killing them with flowers with a scent that proved toxic with Cybermats. (COMIC: Flower Power)

Travelling with Jamie again
The Doctor enrolled John and Gillian in a university on Zebadee to keep them safe from the Quarks, and retreieved Jamie from 1967, where he had been working at a Scottish radar station. (COMIC: Invasion of the Quarks)

Traveling alone
After Jamie was returned to his own time by the CIA, this time keeping his memory using a mind-trick the Doctor taught him, (COMIC: The World Shapers) the Doctor had an encounter with the Terrible Zodin, (TV: The Five Doctors) and then acted as a jury member of the First Doctor's trial. (PROSE: The Juror's Story)

The Doctor attended a UNIT reunion party, where he and the Brigadier were kidnapped by Borusa and taken to the Death Zone. The two escaped from a squad of Cybermen, encounter a Yeti and faced illusions of Jamie and Zoe. In the Dark Tower, the Doctor met his first, third and fifth incarnation, their companions and. After Borusa was turned to stone by Rassilon, the Doctor was returned to his timezone. (TV: The Five Doctors) During a brief trip in the TARDIS with the Brigadier, the Doctor was trapped in the event horizon of a black hole. (AUDIO: The Three Companions)

Whilst hunting a troubled woman who had the ability to make others feel her pain and loneliness, the Doctor met an American teenager called Nanci Cruz, who helped him to stop the woman. (PROSE: Mother's Little Helper)

The Doctor helped Jovain Pallis investigate a murder on human colony on Mars, only to discover that Jovain was the murderer, (PROSE: Dust) joined forces with a gang of teenage outcasts to stop the awakening of a golem, (PROSE: Golem) and teamed up with all of his other incarnations to save Gallifrey from destruction at the end of the Last Great Time War. (TV: The Day of the Doctor)

The Doctor later gave a librarian a purpose in life, (PROSE: Pass It On) and went undercover at a film production which featured the Cybermen. (PROSE: Scientific Adviser) The Doctor was trapped in the Determinant by, along with his six other incarnations, but was saved when the Graak defeated the Master, and sacrificed it's life force to liberate the trapped Doctors. (GAME: Destiny of the Doctors)

Hiding in luxury
Unable to hide behind CIA protection, the Doctor's sentence of exile to Earth was enforced, (COMIC: Action in Exile) although he was able to escape before the Time Lords could enforce a regeneration. (COMIC: The Night Walkers)

Exiled, the Doctor took up residence on Earth, living in the Carlton Grange Hotel in London. (COMIC: Action in Exile) During this period, he enjoyed considerable luxury and press attention, with people from around the world bringing their problems to him. (COMIC: The Mark of Terror, The Brotherhood, U.F.O.)

Death
While appearing on the game show Explain My Mystery, the Doctor was asked to consider the case of Mr. Glenlock-Hogan, a farmer with walking scarecrows. He wasn't able to do so and arranged for an off-camera visit to the farm. Knowing it was a case so preposterous-sounding that it would not be taken seriously by anyone else but him, the Doctor wanted to investigate the matter privately. When he arrived, the scarecrows duly began to walk around. Eventually, they captured and shot him, revealing that they had been animated by the Time Lords in order to carry out the remaining part of his sentence.

The scarecrows dragged him to his waiting TARDIS, where they forced him to regenerate. During the process, the scarecrows programmed the TARDIS for a final flight, then left. (COMIC: The Night Walkers) The TARDIS travelled to an English field, where it was found, along with the newly-regenerated Doctor, by UNIT. (TV: Spearhead from Space)

Undated adventures

 * The Second Doctor, Jamie and Victoria travelled to Venus, where the Doctor learned Venusian aikido. (AUDIO: Voyage to Venus)
 * The Second Doctor also travelled to Draconia, during the reign of the Fifteenth Emperor, and cured a local plague, which earned him a nightingale as a Noble Draconian. (PROSE: The Dark Path) Holding a title on Draconia later helped the Third Doctor. (TV: Frontier in Space)
 * River Song was offered 'this cool place on Telos' by the Second Doctor, but according to her diary she "saw right through that (and I hope he chokes on that recorder.)" As with all the former incarnations of the Doctor she interacted with, she wiped his memory with mnemosine recall-wipe vapour so as to not contaminate the timeline. (GAME: The Eternity Clock)
 * At some point, the Second Doctor had an adventure which he either shared with the Eighth Doctor or which ran parallel to Eight's own adventure. (TV: The Name of the Doctor)
 * The Second Doctor attended the funeral of Alistair Gordon Lethbridge-Stewart, as did all of his other incarnations. (PROSE: The Gift, Shroud of Sorrow)

Personality
The second incarnation was a complete change of pace from his predecessor - whimsical, somewhat buffoonish, yet still witty. He 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 his bluster and tendency to panic when events got out of control, the Second Doctor always acted heroically and morally in his desire to help the oppressed and fight "the most terrible things [in the universe]". (TV: The Moonbase, The Enemy of the World, The War Games)

He also had a warmer, gentler way about him than his previous incarnation. (TV: The Tomb of the Cybermen) Mercurial, clever, and always a few steps ahead of his enemies, at times he could be a calculating schemer who would not only manipulate people for the greater good, but act like a bumbling fool in order to have others underestimate his true abilities. (TV: The Evil of the Daleks, The Tomb of the Cybermen, The Web of Fear, The Wheel in Space)

He was very childlike in his love of play, dancing a jig in his new body, (TV: The Power of the Daleks) on the outskirts of Atlantis, (TV: The Underwater Menace) and a beach in Australia. (TV: The Enemy of the World) Although he was always in trouble, he loved peace and quiet and was as surprised and frightened of alien menaces as those who faced them with him.

Despite the Doctor's almost childlike recklessness, it was always clear to his allies that a keen, deliberate intellect lurked behind his every action. (TV: The Macra Terror) Although he frequently gave the impression that he never knew what he was doing, this was simply an an act put on to fool those who would underestimate him. (TV: The Tomb of the Cybermen, The Dominators)

Paradoxically, he had a deep streak of ruthlessness when needed, as he wired the Cyber-Tombs doors to fatally electrocute anyone trying to open them, (TV: The Tomb of the Cybermen) reacted unfazed to Salamander's fate, (TV: The Enemy of the World) ensured that a relatively helpless party of Daleks would all die, (COMIC: Bringer of Darkness) steered an Ice Warrior fleet into the sun, (TV: The Seeds of Death) and used his ray gun to killed the Master of Spiders while shouting "Die, hideous creature... die!" (COMIC: Master of Spiders)

The Second Doctor was also painfully aware of the need to see the "bigger picture", knowing that it was entirely proper to sacrifice a few lives if it would save millions. (TV: The Evil of the Daleks)

The Second Doctor had a noticeably antagonistic relationship with the Third Doctor, their personalities so different that they seemed incapable of working together without the authoritative presence of the First Doctor. (TV: The Three Doctors)

The Sixth Doctor considered his second incarnation to be an "antediluvian fogey" for apparently being captured by the Sontarans. (TV: The Two Doctors)

By the time he fought Side, the Doctor considered Jamie to be the most reliable friend that he had ever had. (AUDIO: The Jigsaw War) The Sixth Doctor even told his companion, Peri Brown, that he was "always very fond of Jamie." When Chessene of the Franzine Grig informed him that Jamie had most likely been killed in a Sontaran attack, the Doctor began going into a grief-stricken tantrum until he was restrained. (TV: The Two Doctors)

Zoe Heriot considered the Second Doctor to be a "lovely little man", who was "such fun to be with." (PROSE: One Small Step...) On another occasion, she described him as "old, clever and kind." (AUDIO: The Five Dimensional Man)

When faced with a forced regeneration from the Time Lords, the Doctor, at first, was concerned over his next incarnation's appearance, maintaining that he had the right to decide what he looked like. After rejecting his offers, the Doctor protested that the Time Lords could not treat him the way they were, and continued protesting in the void, (TV: The War Games) until the Celestial Intervention Agency intervened. (PROSE: World Game)

When he was shot and executed by the Time Lords' animated scarecrows, the Doctor used his dying breath to reassure Farmer Hogan, who was on the verge of a nervous breakdown from seeing his scarecrows come to life, that the phenomenon would not happen again after the night was over. (COMIC: The Night Walkers)

Habits and quirks
The Second Doctor developed a habit of running away from danger when inappropriately prepared, often instructing his companions to retreat with, "when I say run, run!" (TV: The Power of the Daleks, The Evil of the Daleks, The Tomb of the Cybermen) He was prone to exclaiming, "Oh, my word!", when startled, (TV: The Ice Warriors, The Dominators, The Invasion, The War Games) intrigued, (TV: The Web of Fear, The Krotons, The Three Doctors) or annoyed. (TV: The Seeds of Death) Another favoured phrase of his was, "Oh, my giddy aunt!" (TV: The Two Doctors)

The second incarnation possessed a recorder, which he played to concentrate or while under stress. (TV: The Power of the Daleks, The Three Doctors) This recorder was also one of the Doctor's tricks of obfuscation, and he could use it as an effective tool, having a separate mouthpiece that turned it into a spyglass, (TV: The Wheel in Space) improvise it into a blowgun, (TV: The Underwater Menace) or play a tune with a hidden message.

He displayed a fondness of music in other ways besides the recorder, occasionally humming bits of music, (TV: The Krotons) and creating a glass harmonica out of a water glass to pick the sonic lock in his Vulcan Colony cell. (TV: The Power of the Daleks) He had a silent whistle and a pair of bagpipes and told Jamie he could trade travel on the TARDIS for lessons. (TV: The Highlanders) In Atlantis, he played his recorder and a small tambourine as part of his disguise. (TV: The Underwater Menace)

He easily donned disguises without self-consciousness to age, gender, or dignity; he posed as a German physician, a washerwoman, and a wounded British soldier in Scotland. (TV: The Highlanders) In Atlantis, he dressed as a strange, gypsy-like musician. (TV: The Underwater Menace) Against his will, he also impersonated his physical double, Ramón Salamander, with a performance convincing enough to fool Jamie and Victoria. (TV: The Enemy of the World)

Other habits included wringing his hands together, (TV: The Faceless Ones, The Tomb of the Cybermen, The Mind Robber) shifting his jaw when pondering, (TV: The Krotons, The Three Doctors) and elbowing Jamie. (TV: The Faceless Ones, The Web of Fear)

Skills
The Second Doctor had a gift for diplomacy and winning others over to his side, enabling him to trick others into doing what he wished, such as fooling Jamie into going through a series of tests designed to isolate the Human Factor, tricking 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. (TV: The Evil of the Daleks) In a similar way, he pretended to go along with the Great Intelligence's brain transference operation in order to short-circuit the disembodied being, (TV: The Web of Fear) convinced the War Chief to regard him as an ally, (TV: The War Games) and persuaded Omega to spare the Third Doctor's life. (TV: The Three Doctors)

He also possessed telepathic ability, including being able to use telepathy to show Zoe Heriot his previous adventure with the Daleks via mental projection, (TV: The Wheel in Space) but found the process tiring. (TV: The Dominators) The Master of the Land of Fiction had to trick him with his loyalty to Jamie and Zoe in order to gain partial control of his mind and will. (TV: The Mind Robber) He locked his mind in battle with the Great Intelligence and kept it occupied long enough for his friends to act against it. (TV: The Abominable Snowmen) Although the Androgum Chessene could read minds, she could not read the Doctor's, even when he was drugged and helpless. (TV: The Two Doctors)

He was also shown to be adept with at least a basic level of hypnosis, having used it on Victoria, to break the programming implanted by the Great Intelligence in Tibet, and on Songsten, in order to extract information regarding the Intelligence's scheme. (TV: The Abominable Snowmen) The Doctor later put Vana into a trance following the mental assault inflicted by the Krotons. (TV: The Krotons)

Physically younger than his predecessor, the Second Doctor was able to outrun various pursuers, (TV: The Seeds of Death) and avoid weapon ammunition fired at him. (TV: The Invasion)

Appearance
The second incarnation resembled a shortish man in his early forties, with longish, rumpled hair, (TV: The Tenth Planet, The Power of the Daleks) and blue eyes. (TV: The Three Doctors) After going on a stressful mission for the Time Lords, his dark hair briefly turned grey. (TV: The Two Doctors; PROSE: World Game)

One account described his eyes as being "soft chestnut brown", (PROSE: Pluto) while another depicted them as bright green. (COMIC: Prisoners of Time) A third account claimed his eyes appeared to change colour several times, alternating between blue, grey, and green. (PROSE: Invasion of the Cat-People)

Liz Shaw told her mother that the Doctor resembled a "geography teacher" when he first encountered UNIT. (AUDIO: The Last Post) Polly Wright described him as looking like "an unmade bed" to Jamie, (PROSE: The Nameless City) and "a bit sartorially challenged" to the Brigadier. (AUDIO: The Three Companions) Madame Razetskia described the Second Doctor as a "funny little clown". (PROSE: Endgame)

Samantha Briggs described the Second Doctor as "a short man with a mournful face and disheveled clothing." She also noted that he had a "blurred" English accent, which defied description, and seemed to be extremely knowledgeable on a wide variety of subjects. (PROSE: Who Killed Kennedy)

Polly also compared his hairstyle to those worn by the Beatles, (AUDIO: The Three Companions) as did John Benton, (AUDIO: The Hexford Invasion) Isobel Watkins, (PROSE: Who Killed Kennedy) and Ace. (AUDIO: The Light at the End)

Clothing
The Second Doctor dressed similarly to his previous incarnation, though in far more clustered fashion; His trousers were clownishly large and his bow tie was often crooked and used to secure his shirt collar. (TV: The Power of the Daleks)

He wore a battered old frock coat many sizes too large, which added to his clownish demeanor, (TV: The Power of the Daleks) but demonstrated its usefulness as a secret arsenal of tools, gadgets, food, and seemingly frivolous objects; he carried the TARDIS' Time Vector Generator inside a pocket in his inner lining without difficulty, (TV: The Wheel in Space) and had a magnet hidden in a pocket sewn behind his outer breast pocket. (TV: The Invasion) The Doctor often kept a handkerchief in the coat's breast pocket. (TV: The Highlanders)

Under his frock coat, he wore a plain shirt with a blue bow tie. (TV: The Power of the Daleks) His shirt colours varied from plain white to a bright or dull blue. (TV: The Power of the Daleks, The Three Doctors, The Five Doctors) He also wore brown-themed baggy plaid trousers, and black ankle boots. (TV: The Power of the Daleks)

When in colder environments, the Doctor would wear an over-sized fur coat, (TV: The Abominable Snowmen, The Ice Warriors, The Five Doctors, The Name of the Doctor) or a cloak. (TV: The Highlanders, The Underwater Menace, The Tomb of the Cybermen)

He also expressed a liking for hats in general, stating that he "would like a hat like that" when he spotted new headgear. (TV: The Power of the Daleks, The Highlanders) His most prominent hat was a stovepipe hat, (TV: The Power of the Daleks, The Underwater Menace) but he also wore a and a British Army  while in Scotland. (TV: The Highlanders)

The Brilliant Book 2011
According to The Brilliant Book 2011 (a non-narrative based book), the Second Doctor met Winston Churchill in 1882, giving him lessons in Latin, including how to address a table in Latin.

Other matters

 * Rupert Davies, Valentine Dyall, Michael Hordern and Brian Blessed 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" and as being his favourite Doctor. Smith's costume and mannerisms are reminiscent of Troughton's.
 * Almost half of the episodes from the Second Doctor's era have been lost, leaving only seven of Patrick Troughton's 21 TV stories still fully intact (excluding his appearances in multi-Doctor specials). Two further incomplete stories have been released commercially, with specially-created material to bridge the missing episodes. Surviving "orphan" episodes and footage have been released on the Lost in Time DVD collection.
 * The Second Doctor was the first incarnation to directly work with four of his other selves on television, though that turned out to be a number also attained by the Fifth Doctor by virtue of Time Crash. If one includes a story this wiki generally doesn't — Dimensions in Time — then it could be said that the Third and Sixth Doctors were on the "four-timer" list, as well. However, there was no actual "interaction" between Doctors in Dimensions.
 * Until Time Crash, the Second Doctor was the only incarnation to appear in all televised multi-Doctor stories. As of 2013, Troughton holds the record for working with the highest number of other incarnations, having directly interacted with four other Doctors: the First, Third, Fifth, and Sixth Doctors. Taking into account all performed media, however, the record-holder is Peter Davison.  His appearances on audio with the Sixth, Seventh, and Eighth Doctors add to his totals from The Five Doctors and Time Crash, to give a grand total of eight other Doctors.
 * The Second Doctor was the first incarnation to have his face integrated into the Doctor Who title sequence, beginning with The Macra Terror.

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