Guest Stars Mitch Pileggi as Assistant Director Walter Skinner Steven Williams as Mr. X Brian Thompson as Bounty Hunter Peter Donat as Bill Mulder Megan Leitch as Samantha Mulder Colin Cunningham as Lt. Terry Wilmer Co Starring Bonnie Hay as Field Doctor Andrew Johnston as Agent Barry Weiss Oliver Becker as Doctor #2 Beatrice Zeilinger as Paramedic Allan Lysell as Abe Gardner J.B. Bivens as Sharpshooter Garry Davey as Captain