"Apocrypha" is the sixteenth episode of the third season of the American science fiction television series The X-Files. It premiered on the Fox network on February 16, 1996. It was directed by Kim Manners, and written by Frank Spotnitz and series creator Chris Carter. "Apocrypha" included appearances by John Neville, Don S. Williams and Brendan Beiser. The episode helped to explore the overarching mythology, or fictional history of The X-Files. "Apocrypha" earned a Nielsen household rating of 10.8, being watched by 16.71 million people in its initial broadcast. The show centers on FBI special agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) who work on cases linked to the paranormal, called X-Files. In this episode, Mulder returns from Hong Kong, having found rogue agent Alex Krycek (Nicholas Lea) while investigating a mysterious mind-altering black oil. Meanwhile, Scully pursues the man who she believes killed her sister. "Apocrypha" is the second part of a two-part episode, continuing the plot from the previous episode, "Piper Maru". "Apocrypha" was the first mythology-centered episode to be directed by Manners, and made use of a mixture of physical and digital effects to create the episode's antagonistic black oil. The episode's sets were also augmented with digital effects, amplifying what could be constructed within the given budget.