Category:Non-DWU material is the top-level category for fictional elements which cannot be said to take place within the Doctor Who universe. Note that production personnel for invalid stories may be included in Category:Real world, even though the narrative they helped create is not considered to be within Category:Time-Space Visualiser. Determination of what is within the "Doctor Who universe" as we define it, and what is not, is outlined at tardis:valid sources.

Articles and categories tagged with a non-DWU category cannot also be tagged with an in-universe tag. For instance, The Master (Battle for the Universe) is properly filed under Category:non-DWU Masters. But it is not filed under Category:Incarnations of the Master, because a thing cannot be at once DWU and non-DWU.