Wikipedia:Wikipedia is not the Tardis Data Core
 | This is an essay. It contains the advice or opinions of one or more Wikipedia contributors. This page is not an encyclopedia article, nor is it one of Wikipedia's policies or guidelines, as it has not been thoroughly vetted by the community. Some essays represent widespread norms; others only represent minority viewpoints. |
 | This page in a nutshell: Things aren’t automatically notable because they’re from Doctor Who. |
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Doctor Who, for those living under an Ogri, is a wildly popular, extremely British science fiction franchise about a humanoid alien who travels across time and space in a police telephone box that’s bigger on the inside. It’s incredibly long running, with some form of Doctor Who media being published continuously since 1963. However, this impressive pedigree doesn’t make it immune to notability standards; notability is not inherited from the series itself, nor from being part of a notable set of characters like the companions or even the various incarnations of the Doctor themself. Invalid arguments are not any more applicable because the article is about something from the franchise, and Wikipedia doesn’t need to cover non-notable elements and media from the franchise on the basis of it having the Doctor Who brand slapped on it.
There are many secondary sources discussing Doctor Who. Avail yourself to the usual searches to find out if a specific topic of the Whoniverse fits the encyclopedic purpose of Wikipedia or not.
For those who desire to exhaustively catalog Doctor Who media, concepts, characters and everything else that ever appeared or received even the tiniest mention on the show or in one of its countless spinoffs, the extensive fan wiki Tardis Data Core (AKA Tardis wiki or just the Doctor Who wiki) exists exactly for that purpose.