User:Epsilon the Eternal/Sandbox Four

After becoming too well recognised in Earth history, the Doctor had retconned themselves into popular culture; (PROSE: Afterword) subsequently, a character most commonly known as the Doctor, also referred to as Doctor Who, (PROSE: Hospitality) was the lead character in the BBC science fiction/drama series, (TV: Remembrance of the Daleks) Doctor Who. (PROSE: Bafflement and Devotion, WC: The Zygon Isolation, et al.)

The character bore many uncanny similarities to their real counterpart: the character most commonly portrayed by male actors, mirroring many incarnations of the Doctor who appeared to be male in appearance; (PROSE: Hospitality, TV: In the Forest of the Night, WC: The Zygon Isolation) as well as shared physical likenesses, (TV: In the Forest of the Night, WC: The Zygon Isolation) as well as many of the Doctor's actual adversaries also appearing as fictional antagonists in the series. (PROSE: Fanboys, The Terror of the Umpty Ums, WC: The Zygon Isolation)

Development
Presumably as a result of the Doctor retconning themselves in popular culture, (PROSE: Afterword) on the 26th of March, 1963, Winston Churchill sent a letter a Mr Newman, to pitch the concept of a show about Churchill's old friend, the Doctor. (PROSE: Stop, Thief!)

A young woman, Verity, went to the BBC, and became the producer of the show, despite the protests of the "Men Who Knew What To Do". By standing her ground against their blatant sexism, she helped the Doctor Who series flourish with her creative ideas. (PROSE: Verity)

Portrayal in the series
In 1974, an episode of the series aired, portraying the regeneration of Third Doctor into his next incarnation, the Fourth Doctor. (PROSE: Fanboys)

Sometime in 1980, the Fourth Doctor would then too would regenerate into the Fifth Doctor. (PROSE: Fanboys)

In the late 1990s, an unspecified incarnation of the character was portrayed by Paul McGann in the Doctor Who TV movie. (PROSE: Hospitality)

Around Autumn of 2015, the ninth series of the show was broadcast on BBC One, starring another unspecified incarnation, who travelled with a companion called Clara; the twelfth incarnation of the Doctor bore a great similarity to this fictional depiction, and the same could be said about Clara Oswald. (WC: The Zygon Isolation)

By 2020, the Doctor was portrayed by a female actress. (PROSE: The Terror of the Umpty Ums, WC: The Zygon Isolation)

Alternate accounts
While many accounts support the Doctor having a near identical fictional counterpart, other sources, while similar in nature, show distinguishable accounts.

A couple of accounts show that there was an comic book series, Time Surgeon, about the titular Time Surgeon and his companion Kara, who travel in a flat pack wardrobe; (COMIC: The Fourth Wall, Invasion of the Mindmorphs) curiously, while the Doctor is shown to be aware of the series based around his own adventures in time and space, (PROSE: Bafflement and Devotion, TV: In the Forest of the Night) the Twelfth Doctor is baffled by the existence of Time Surgeon. (COMIC: The Fourth Wall, Invasion of the Mindmorphs)

Without interaction from the Doctor, a series known as Doctor X was first aired in around the same time as Doctor Who. The series centred around the titular character. (PROSE: In Search of Doctor X)

Established by around a dozen of accounts, another series with an extremely similar title to Doctor X, Professor X was aired on BBC One at the exact same time and date as Doctor Who, creating two very irreconcilable accounts of the series about the Doctor. (AUDIO: An Unearthly Woman, PROSE: No Future, et al.)