he series revolves around Federal Bureau of Investigation (FBI) Special Agents Fox Mulder and Dana Scully , who investigate the eponymous "X-Files": marginalized, unsolved cases involving paranormal phenomena. Mulder is a skilled criminal profiler, an ardent supernaturalist, and a conspiracy theorist who believes in the existence of the paranormal, whereas Scully is a medical doctor and a skeptic who has been assigned to scientifically analyze Mulder's discoveries.