David Duchovny FBI Special Agent Fox Mulder Actor Gillian Anderson FBI Special Agent Dana Scully Actor Robert Patrick John Doggett Actor Mitch Pileggi Asst. Dir. Walter Skinner Actor Tom Braidwood Melvin Frohike Guest Star Annabeth Gish Monica Reyes Guest Star Bruce Harwood John Fitzgerald Byers Guest Star Dean Haglund Richard "Ringo" Langly Guest Star Zachary Ansley Billy Miles Guest Star Arlene Warren Skinner's Assistant Guest Star Marc Gomes Agent Danny Mosley Guest Star Nelson Mashita Dr. Lim Guest Star James Pickens Jr. Alvin Kersh Guest Star Nicholas Lea Alex Krycek Guest Star Kirk B.R. Woller Agent Gene Crane Guest Star Judson Scott Absalom Guest Star Jonathan Palmer Principal Guest Star Christopher Stanley Agent Farah Guest Star Christine Firkins Thea Sprecher Guest Star Adam Baldwin Knowle Rohrer Guest Star Chris Carter Executive Producer, Writer, Director Richard Compton Director Vince Gilligan Writer Terrence O'Hara Director Peter Markle Director Barry K. Thomas Director Gregory McClatchy Executive Producer Frank Spotnitz Director, Writer Kim Manners Director Tony Wharmby Director Rod Hardy Director Greg Walker Writer Steven Maeda Writer David Amann Writer Jeffrey Bell Writer John Shiban Writer Daniel Arkin Writer