David Duchovny FBI Special Agent Fox Mulder Actor, Writer Gillian Anderson FBI Special Agent Dana Scully Actor Mitch Pileggi Asst. Dir. Walter Skinner Guest Star Bruce Harwood John Fitzgerald Byers Guest Star William B. Davis Smoking Man Guest Star Dean Haglund Richard "Ringo" Langly Guest Star Jaap Broeker The Stupendous Yappi Guest Star Don S. Williams Elder 1 Guest Star Stanley Walsh Elder 2 Guest Star John Neville Well-Manicured Man Guest Star Don MacKay Oates Guest Star Sheila Larken Margaret Scully Guest Star Brendan Beiser Agent Pendrell Guest Star Tom Braidwood Melvin Frohike Guest Star Bonnie Hay Night Nurse Guest Star Steven Williams Mr. X Guest Star Morris Panych Gray Haired Man Guest Star Ernie Foort Security Guard Guest Star Lenno Britos Hispanic Man Guest Star John Moore Elder 3 Guest Star Chris Carter Executive Producer, Writer, Director Howard Gordon Writer Darin Morgan Writer Kim Newton Writer Jeff Vlaming Writer John Shiban Writer Vince Gilligan Writer Charles Grant Craig Writer Rob Bowman Director Kim Manners Director David Nutter Director R.W. Goodwin Director Mat Beck Writer Tucker Gates Director Frank Spotnitz Writer James Charleston Director