Guest Stars Mitch Pileggi as Assistant Director Walter Skinner Nicholas Lea as Agent Alex Krycek Steven Williams as Mr. X Jon Gries as Salvatore Matola Tony Todd as Augustus Cole Co Starring William B. Davis as Cigarette-Smoking Man Mitchell Kosterman as Detective Horton Dave Adams as Dr. Girardi Don Thompson as Henry Willig Michael Puttonen as Dr. Pilsson Paul Bittante as Lt. Reagan Anna Hagan as Dr. Charyn Claude De Martino as Dr. Grissom
