 The tagline for this episode is "You see what I want you to see".Though not originally billed as a mythology episode, "Ghouli" helps to explore the series' overarching mythology and serves as the second of three mythology episodes of the season following the season premiere.The show centers on FBI special agents who work on unsolved paranormal cases called X-Files; focusing on the investigations of Fox Mulder (David Duchovny), and Dana Scully (Gillian Anderson) after their reinstatement in the FBI.