Third Doctor

The Third Doctor is the main protagonist of Doctor Who from Season 7 to Season 11. He returns as a major character in the 20th Anniversary Special, The Five Doctors.
He regenerated from the Second Doctor, who had been sentenced by the Time Lords and exiled to Earth. During his time on Earth, the Third Doctor acted as the scientific advisor to UNIT and continued to work with them even after his exile was lifted.
He was portrayed and later voiced by the late . In Big Finish's Third Doctor Adventures, he is voiced by Tim Treolar. 
==Biography==
The Third Doctor emerged after the Second Doctor was convicted by the Time Lords of violating their non-interference policy and forced to regenerate as part of his punishment, which also entailed exile to Earth, and lacking the knowledge on how to repair the TARDIS.
===Spearhead from Space===
After arriving in Oxley Woods in England, the Doctor fell out of the TARDIS, and was taken to a nearby hospital, where his alien biology briefly caused a media stir, which attracted the attention of UNIT and Brigadier Lethbridge-Stewart. While he did not recognise the Doctor due to his regeneration, the Doctor managed to meet him, discovering his new face for the first time. The Doctor was nearly abducted by Channing's men, but managed to escape, taking a grazing shot from a sentry. He managed to escape the hospital by donning a new set of clothes and borrowing a sporty antique roadster and headed to UNIT HQ. There, he formally re-encountered the Brig, and met UNIT's scientific adviser, Liz Shaw, and joined them in investigating mysterious meteorites. 
===Season 7-9===
On Earth, the Third Doctor joined UNIT as their scientific advisor, having already had a history with UNIT's commander Brigadier Lethbridge-Stewart in his second incarnation. While working with UNIT, the Third Doctor was provided an assistant in Liz Shaw, though she eventually grew tired of "handing him test tubes" and quit. However, the Third Doctor would gain a new companion in the form of Jo Grant, who was assigned to replace Liz. During his time on Earth and with UNIT, the Third Doctor repeated defended the Earth and humanity from threats, including the Auton puppets of the Nestene Consciousness and the Silurians along with their underwater cousins the Sea Devils.
However, during his second encounter with the Autons on Earth, the Third Doctor also found himself menaced by his former university colleague, who had taken up the name "the Master" and was working with the Autons. The Third Doctor and the Master would go on to have numerous encounters, with the Master enacting various schemes to take over Earth, the planet the Third Doctor cherished, attain more power for himself, or simply to get on his old friend's nerves.
===The Three Doctors===
Eventually, the Third Doctor was sought out by the Time Lords to help them against the renegade Time Lord founder Omega, who threatened to destroy the universe. The Third Doctor found himself working with his previous incarnation to stop Omega, though the two frequently bickered, and even briefly received help from his first incarnation. As reward for saving the universe from Omega, the Third Doctor's banishment was lifted and he was free to explore outer space again.
===Dalek War===
In his adventures across the space, the Doctor would run into the Master again, who was now being employed by the Daleks to start an interstellar war between the humans and the Draconians, in order to weaken both sides so the Daleks could conquer the galaxy in the aftermath with an invasion force of Daleks kept in stasis on Spiridon. As a result, the Doctor found himself once again working with the Thals to stop the Daleks.
===Season 11===
Following Jo Grant's departure, the Doctor met Sarah Jane Smith while tracking down scientists who were abducted through time by the Sontaran officer Linx. Winning her trust, the Dotcor and Liz managed to rescue the scientists and prevent Linx from damaging Earth's technological development. The Third Doctor met his end during his confrontation with the spiders Eight Legs of Metabelis III, triggering his regeneration into the Fourth Doctor.
==Personality==
The Third Doctor projected the image of a sophisticated gentleman and inventor, with him often tinkering with his TARDIS in order to construct new machines from its technology. In addition to his prowess with gadgetry, the Third Doctor was also much more prone to get physical than his previous incarnations, often showing off his hand-to-hand combat prowess against opponents, though he usually tried not to seriously harm them.
Frustrated with his exile to Earth, the Third Doctor was often gruff and aloof, somewhat resenting the fact that he was stuck on Earth, though he usually showed a warm personality to his companions. Indeed, he especially rubbed up against ignorant authority figures. Despite his high class demeanor, the Third Doctor often enjoyed imparting bits of alien wisdom and knowledge onto unsuspecting humans for his own amusement. He at heart grew to love his time on Earth, in spite of his exile, eventually seeing it as his home. 
== Quotes ==
== Gallery ==
File:ThirdDoctor.png|The Third Doctor in season 7. 
File:3rdLizBrigadier.jpg|The Doctor with Brigadier Lethbridge-Stewart and Liz Shaw. 
File:3rdJo.jpg|The Doctor and Jo on an alien planet in Colony in Space. 
File:ThirdDoctorDotD.jpg|The Doctor in the dystopian future of Day of the Daleks. 
File:3rdDoctor.jpg
File:Third Doctor.jpg
File:3rdUNITSrah.jpg
==Trivia== 
*The Third Doctor's era drew a lot of inspiration from the James Bond films. This was due to the fact that the films were popular at the time, as well as part of an effort to retool the show slightly in order to recoup the ratings decline that had occurred under the Second Doctor's era, and because of the personal taste of Jon Pertwee, who had served in naval intelligence during World War II and even been an acquaintance of Ian Fleming, the creator of James Bond.
*He is the first Doctor to be on colour TV.
*The Third Doctor didn't like his looks in the beginning, bemoaning he became old.
**The Eleventh Doctor was aghast the Twelfth would be old, right after his new regeneration cycle reset his youth.
*The Third Doctor is the first version of the Doctor to directly be acknowledged to be an alien. While his predecessor's final story, The War Games heavily implied this by depicting the Time Lords, The Doctor is depicted with an alien biology, most notably his two hearts, and directly states that he is non human.
*Jon Pertwee was good friends with Roger Delgado, who played his arch-enemy the Master. Delgado's unexpected death in Turkey while filming a movie was part of Jon Pertwee's decision to leave the series in Season 11.
*According to River Song's diary, this Doctor was one of her favorites and they enjoyed each other's company; though she did wipe his memory to preserve the timeline.
*He was the first Doctor to hold a steady job, being the first UNIT scientific advisor. Even though his successors abandoned the post, the Doctor never resigned and was still counted as an employee for decades.
**He was also being paid the entire time, but never touched his bank account. The Fourteenth Doctor later discovered that 53 years of accumulating funds gave him a fortune that could easily fully pay off his new home.
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