Who is Doctor Who? (tie-in website)

A list of real world individuals and other things associated with Doctor Who that also exist within the DWU, but have not been mentioned as being involved with the in-universe Doctor Who franchise.

Biography
After seeing Dr. Who's adventures on television, Monica, Buttons, and Cuthbert arrived at the studio to attempt to recieve his autograph, but their plan goes awry when the guard chases them into Dr. Who's TARDIS. (COMIC: TV Terrors)

In 1974, a serial of the series aired, portraying the regeneration of Third Doctor into his next incarnation, the Fourth Doctor.

Prior to 1981, the character of the Fourth Doctor regenerated into the Fifth Doctor, who was set to return in the upcoming season. (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 the early 2000s, Paul Magrs wrote in a short piece of prose about his books and inspirations. In this piece, he stated that the second and fourth incarnations of the Doctor were Patrick Troughton and Tom Baker, respectively. (PROSE: Bafflement and Devotion)

In 2008, Paul Magrs worked on several scripts for Doctor Who CDs, which, once completed, would require Paul to travel to London and help with the production, where he got to meet Tom Baker. (PROSE: The Story of Fester Cat)

On Red Nose Day 2013, Dermot O'Leary surprised his co-presenter Claudia Winkleman with a guest appearance of the Eleventh Doctor. She then flirtatiously Claudia chased the Doctor around. (TV: The Doctor Appears)

Peter Capaldi was cast as the Twelfth Doctor in 2013, where he attended a meeting with Steven Moffat. Capaldi prepared for this meeting by reading issues of DWM. Later, he wrote a letter to the readers of DWM, writing about his more than positive opinions of the magazine. (PROSE: A Letter from the Doctor 464, A Letter from the Doctor 500, TV: In the Forest of the Night, et al.)