David Duchovny FBI Special Agent Fox Mulder Actor Gillian Anderson FBI Special Agent Dana Scully Actor Mitch Pileggi Asst. Dir. Walter Skinner Actor Leon Russom Detective Miles Guest Star Andy Umberger Agent Chesty Short Guest Star Peter Macdissi Prison Guard Guest Star Laurie Holden Marita Covarrubias Guest Star Nicholas Lea Alex Krycek Guest Star Eddie Kaye Thomas Richie Guest Star Judd Trichter Gary Guest Star Zachary Ansley Billy Miles Guest Star Gretchen Becker Greta Guest Star William B. Davis Smoking Man Guest Star Sarah Koskoff Theresa Nemman Hoese Guest Star Darin Cooper Deputy Ray Hoese Guest Star Dean Haglund Richard "Ringo" Langly Guest Star Bruce Harwood John Fitzgerald Byers Guest Star Tom Braidwood Melvin Frohike Guest Star Brian Thompson Alien Bounty Hunter Guest Star Kelly Demontesquiou Baby Guest Star Grace Demontesquiou Baby Guest Star Chris Carter Executive Producer, Writer Kim Manners Director