Please do not over-categorize this category. Under no circumstances should this category be placed in "Enemy of <X>" categories — especially of the various Doctors — as it completely overburdens the category structure of this wiki. Given the number of pages that are related to both the Homo Reptilia and the Doctors, placing Category:Silurians and Sea Devils within Category:Third Doctor enemies, et al, totally breaks the category structure of the wikia. Instead, place the page Silurian within those "enemies" categories.