I saved the big one for last,the Fourth Doctor. Most of the answers of the Actors who played the Doctors in the future said Tom Baker was their Doctor when they watched it.
The Fourth Doctor is the fourth incarnation from Doctor Who. He is the only Doctor to have a longer incarnation than the others but the Tenth Doctor has the most companions(and you know that he also wanted to beat Tom's record of 7 years to be 8 or more but stopped at 5 instead).
He was there for 7 years and he was the Curator for the 50th Anniversary special but wasn't there for future special episodes like the Five Doctors and the other special 50th Anniversary episode The Five(ish) Doctors.
Let's get to his summary:
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After contracting radiation poisoning from the crystals of the planet Metebelis 3, the Third Doctor makes his way back to UNIT headquarters in the TARDIS, where the Time Lord K'Anpo Rimpoche aids him in regenerating (Planet of the Spiders).
In his new incarnation, the Doctor is eager to leave Earth in favour of exploration, thus drawing back from continuous involvement with UNIT (with which he had worked closely as the Third Doctor). He has also grown tired of working for the Time Lords. Despite attempts to avoid them altogether, the Time Lords continue to send him on occasional missions, including an attempt to prevent the creation of the Daleks (Genesis of the Daleks), during which he also meets Davros. The Doctor travels with journalist Sarah Jane Smith, whom he had befriended prior to his regeneration, and, for a time, with UNIT Surgeon-Lieutenant Harry Sullivan.
After a battle with Zygons in Scotland, Harry (having just spent an entire season with the Doctor as they tried to get back to the TARDIS) decided that taking the train was safer than the TARDIS, which the Doctor and Sarah Jane chose to try to make an appointment in London. Instead they ended up on the planet Zeta Minor (Planet of Evil), located at the far edge of the known universe. From this point on, the Doctor and Sarah Jane travelled alone.
The Doctor's companionship with Sarah Jane came to an end when he received a telepathic summons to Gallifrey, as humans were not then allowed on the planet. The summons turns out to be part of a trap set by his enemy the Master. The renegade Time Lord has used up all his regenerations and has degenerated into little more than a withered skeletal husk. The Doctor is framed for the assassination of the President of the High Council of Time Lords and put on trial. To avoid execution, the Doctor invokes an obscure law and declares himself a candidate for the office, giving himself the time he needs to prove his innocence and expose the real culprit. This ultimately results in a climactic battle with the Master (The Deadly Assassin).
The Doctor is seen to travel alone for the first time, returning to a planet he had visited centuries before. During his previous visit, he had accidentally imprinted his own mind on a human colony ship's powerful computer, Xoanon, leaving it with multiple personalities. On his second visit the Doctor is now remembered as an evil god by the descendants of the colonists, some of whom had become a warrior tribe called the Sevateem. After the Doctor cures the computer, one of the Sevateem, Leela, joins him on his travels (The Face of Evil). The Doctor brings the intelligent but uneducated Leela to many locales in human history, teaching her about science and her own species' past. In Victorian London, the pair encounters the magician Li Hsien Chang and his master, the self-styled Weng-Chiang (The Talons of Weng-Chiang). Weng-Chiang is revealed to be a time-jumping criminal from the Earth's distant future.
Later, the Doctor and Leela visit the Bi-Al Foundation medical centre, where they acquire the robot dog K-9 (The Invisible Enemy). While K-9 is malfunctioning, a time distortion leads the TARDIS back to contemporary rural England. While investigating the distortion, he and Leela are confronted by an ancient being that feeds on death from Time Lord history, called the Fendahl (Image of the Fendahl). Eventually, the Doctor returns to Gallifrey and declares himself Lord President, based on the election held during his previous visit. This is in fact a ploy to reveal and defeat a Vardan invasion plan, which led to the unexpected consequence of leaving Gallifrey open to attack by the Sontarans (The Invasion of Time). In the aftermath Leela and K9 decide to remain on Gallifrey. The Doctor comforts himself by producing K9 Mark II.
