The Doctor

The Second Doctor is an incarnation of the Doctor. He is portrayed by Astile Doherty.

Within the series' narrative, the Doctor is a centuries-old alien Time Lord from the planet Gallifrey who travels in time and space in his TARDIS, frequently with companions. At the end of life, the Doctor can regenerate his body; as a result, his physical appearance and personality change. Doherty portrays such incarnation, a young man with an eccentric mind and curious attitude who is used to being alone, without a companion to aid him.

Biography
After battling the Cybermen on Mondas and confronting the Twelfth Doctor (The Tenth Planet, Twice Upon a Time), the First Doctor accepted his fate and collapsed in the TARDIS kitchen due to sheer exhaustion. It is also implied that Polly died and Ben ran off in anger, leaving the Doctor alone (Regeneration).

Upon regenerating into a new, younger body, the Doctor repaired the chameleon circuit to change the TARDIS' appearance and took some time to fully recover from his 'renewal'. After receiving a disturbing telepathically message, he wound up collapsing just as soon as he exited his ship and was transported to the house of Morlog. Upon waking up, the Doctor pondered to himself on past events and his current situation, briefly seeing Morlog on the bed before him. After reading a note, looking into a mirror and being momentarily hypnotised, the Doctor found himself in the same room as Morlog and was almost mentally destroyed and put under the dark lord's control. He found out he had his sonic penny whistle on him, however, and was able to disable the mind warping and banish Morlog in between time and space. After disabling Morlog's device disguised as a Focusrite box, nosing around a desk and changing his outfit, the Doctor was transported back to the park he landed in and returned to the TARDIS. The ship failed to take off, however, leaving the Doctor stranded on Earth (The House of Morlog).

At some point, the Doctor managed to repair the TARDIS and left the park in 2020. The Doctor did not leave Earth, however, and landed in the year 2003, this time disguising his ship as a cupboard in the upper floor of a countryside house in Somerset. Although it was well taken care of, not a human soul was in sight, and the Doctor quickly discovered that a seemingly inactive Dalek stood motionless in the cinema room. Despite removing its eyestalk and smelling what appeared to be a rotting corpse, the Dalek casing was in fact a means of spying, using some kind of magnetic control to reattach the eye and alert its superiors, who used a patrol to chase the Doctor into the building.

As the Doctor wondered around and stumbled upon the Dalek's main lair in place of the dining hall, he found that they were reproducing rapidly. It's no house- it's a colony. The Daleks then discovered this was in fact the same man who had ruined their plans with the Galactic Federation, and the trio of Gold Dalek leaders opted to initiate their plan; exterminate all human life, beginning with the city Wells. The Doctor hatched a plan of his own, however, and reconstructed an old fashioned radio to be a detonator linked to the Dalek's main computer, which in turn is linked to every Dalek crafted in the colony.

As the Daleks chanted and began to move out, the Doctor activated the device and all Dalek personnel in the colony were destroyed one by one, including the gold coloured leaders. Before leaving, the Doctor approached the dormant Spy Dalek one last time, giving it another smell causing him to gag and mocking it before accidentally setting off a defensive blast. Frustrated, the Doctor kicked it, removed its eyestalk and calmed himself by chuckling and playing his penny whistle out of the building. As he left, however, the Dalek reattached its eye a second time, pointed it at the ceiling and sent out a distress signal to any potential survivors in the unknown (Colony of the Daleks).

Personality
A contrast to his predecessor, the Doctor is a curious, friendly, somewhat posh young man with high energy. He is significantly more scruffy and childlike in appearance and attitude, and is not afraid to be more physically outgoing, widening his eyes and making various silly movements with his arms. Despite his clownish bluster, however, he is very clever and self-contained. He is very mercurial, such as being briefly upset about someone's demise before instantly becoming set on moving forward and questioning small details in his unknown surroundings.

Unusual to most Doctors, this incarnation is quite used to being alone and talking to himself, mainly due to being companionless during his first adventure. He relies only on himself and no one else to save the day, and, despite acting clueless and slightly cowardly at times, he is never afraid to step in, think fast, be brave and save the day.

The Doctor has a particular fondness for the penny whistle, which he plays whenever he's bored, over excited or needs to concentrate. He also plays it as a sign of victory, such as when he defeated Morlog and the Daleks, both with the use of the penny whistle sonic feature.

Physical Appearance
The Doctor has brown loose-curly hair, brown eyes, dark eyebrows, a smallish nose, and - most interestingly - a scar on his right cheek (likely a negative regeneration effect) loosely in the shape of an anchor. He is about 5 ft 10 or 5 ft 9, has a slim build and light skin. His hair appears to be shorter and with a completely different style in the 4:3 title sequence, although this is mainly due to conditioning of his hair at different times. One of his incarnation reflections also showed him with significantly longer hair, also seen in title sequence 2.2.

This particular Doctor has a fondness for various outfits instead of sticking to just one. After first regenerating, the Doctor retained a small piece of his previous incarnation's clothes (shoes, belt, trousers and shirt). After being given the chance to choose a new outfit from Morlog's wardrobe, the Doctor donned a white, red and blue plaid shirt, a blue tie with gold and red patterning, a navy blue psychedelic pattern waistcoat, a scruffy, oversized black blazer, grey pin-stripe trousers, a green belt with white and black dotting, and brown brogues.

In Colony of the Daleks, the Doctor wears a crimson red shirt with a black Fred Peri t-shirt with gold lining, a cream white tie, grey and black tartan trousers, a black belt, bright blue trainers, and stripy socks. The black and white colouring make this outfit's colours impossible to see, but this wiki should help.

In Horror at Towell Farm, the Doctor is seen in three different outfits with some alterations to the first one early on. His overall outfit for the first half of the story is similar to his outfit in Morlog, but the waistcoat and red tie are shortly replaced with a blue waistcoat and the tie from Morlog. When the mirror entity replaces his clothes (presumably from another dimension), he is now wearing an oversized tweed jacket, the psychedelic waistcoat once again, the red tie from earlier, grey trousers, a pink shirt and black chelsea boots. Expressing displeasure with his "horrible shirt, tie and waistcoat", the Doctor digs through a chest of materials and uncovers a deep navy blue shirt with white polka dots, a black tie with blue stripes, and a black fronted waistcoat with a bronze back. He retains the jacket, trousers and boots.

Stories

 * Regeneration (1)
 * The House of Morlog (1)
 * Colony of the Daleks (1)
 * Horror at Towell Farm (1)
 * Parasite Mind (1)
 * The Curse of Morlog (1)
 * The Cult of Morlog (1)
 * Sticks (1)
 * The Slaves of Steel (2)

Trivia

 * This Doctor is not a different version of Patrick Troughton's Second Doctor. He is a separate incarnation inspired by Troughton's performance, as well as Colin Baker's.
 * As a joke at the end of every episode, Doherty writes the final credit as being "Feel free to consider me for the title role." Chris Chibnall and the BBC have yet to respond, although Doherty doesn't want Jodie Whittaker to leave just yet.
 * If Doherty officially became the Doctor, he would do it for either three years (the standard set by William Hartnell for future actors) or eight years, as to beat Tom Baker's record.