David Duchovny FBI Special Agent Fox Mulder Actor, Writer Gillian Anderson FBI Special Agent Dana Scully Actor Mitch Pileggi Asst. Dir. Walter Skinner Actor William B. Davis Smoking Man Guest Star Nicholas Lea Alex Krycek Guest Star Mimi Rogers Diana Fowley Guest Star Jerry Hardin Deep Throat Guest Star Martin Grey Agent Flagler Guest Star Rebecca Toolan Teena Mulder Guest Star Floyd "Red Crow" Westerman Albert Hosteen Guest Star John Finn Michael Kritschgau Guest Star Warren Sweeney Dr. Harriman Guest Star Andrew Cavarno Dream Boy Guest Star Steven Cavarno Dream Boy Guest Star Arlene Warren Skinner's Assistant Guest Star Megan Leitch Samantha Mulder Guest Star Fritz Greve Bearded Man Guest Star Brian George Project Doctor Guest Star David Brisbin Second Doctor Guest Star Anthony Anselmi Paramedic Guest Star Henry Schwartz Toddler Guest Star Chris Carter Executive Producer, Writer Michael W. Watkins Director