Maru and realizes someone is leaking information. Meanwhile, Skinner tells Scully that he recognizes his shooter as the man who was with Krycek when the digital tape was stolen from him. Mulder believes that the oil found on the diving suit and Gauthier is a medium used by an alien to transfer from body to body, and that Krycek is currently occupied by it. Mulder and the Lone Gunmen use Krycek's key to recover the tape from a locker at an ice rink, but Mulder finds the case empty. Krycek returns the tape to the Smoking Man in exchange for the location of the recovered UFO. As Luis Cardinal is identified as Skinner's shooter, the Syndicate admonishes the Smoking Man for moving the UFO to a new location. By rubbing a pencil over the envelope containing the tape case, Mulder finds a phone number which connects him to the Syndicate's office. Mulder speaks to the Well-Manicured Man, who offers to meet with him. The Well-Manicured Man tells Mulder that a UFO was sunk during World War II and that a cover story of a sunken atomic bomb was used to cover up its attempted recovery. He reveals that anyone can be gotten to, causing Mulder to ask Scully to check on Skinner. Scully accompanies Skinner as he is being transported in an ambulance. When Cardinal attempts to break in, she tracks him down and arrests him. Cardinal tells her that Krycek is headed to an abandoned missile silo in Black Crow, North Dakota. There, the agents are captured by the Smoking Man's men and are escorted away. Deep inside, Krycek sits atop the UFO and coughs out the black oil, which seeps into the ship. Skinner recovers and returns to work. Mulder sees Scully at Melissa's grave, explaining that Cardinal was found dead in his cell. Meanwhile, Krycek is trapped within the silo, banging on the door in an attempt to be let out. Production Conception of the episode was based around a visual image series creator Chris Carter had wanted to include in a script "since the beginning of the show". The image was of a black-and-white flashback taking place in a submarine. The episode's title is a reference to Biblical apocrypha, which series creator Chris Carter felt was appropriate to the episode's thematic concerns—hidden documents and truths not brought to light. Director Kim Manners had directed a number