|This article contains fan theories about Demons and Extraterrestrials. It is separate to avoid contaminating the main page with spoilers and speculation. It is subjective.|
Both Demons and Extraterrestrials exist in parallel in Asylum. Classically, demons are not born of Earth. This goes more to the point that they are one in the same as "little green men". It is possible that the large hulking forms that Kit Walker and Sister Jude have seen "in the flesh" are inhabited by the same type of entity that inhabited Jed Potter and Sister Mary Eunice.