Guest Stars Mitch Pileggi as Assistant Director Walter Skinner Nicholas Lea as Agent Alex Krycek Sheila Larken as Margaret Scully Steven Williams as Mr. X Steve Railsback as Duane Barry Co Starring William B. Davis as Cigarette-Smoking Man Michael David Simms as Senior FBI Agent Steve Makaj as Patrolman Peter LaCroix as Dwight Peter Lapres as Video Technician Bobby Stewart as Deputy Meredith Bain Woodward as Dr. Ruth Slaughter