fictional character american science fiction television series files initially introduced informant leaking diplomatic information fbi special agent fox_mulder aid investigation paranormal cases dubbed files revealed agent secretive syndicate ultimately organization occasions introduced fourth season opener character remained recurring presence series finale truth character portrayed appearances introduced replacement character killed syndicate assassin character received mixed criticism compared similar characters series conceptual history creator chris_carter felt interesting mulder contact woman noting wanted suspicion mulder involved romantically character previously filled role informant series originally cast female character actress cast role replaced shooting scene auditioning role allowed access episode script instead simply told character worked united_nations air intelligent seriousness actress seen series auditioned required audition pages scripted material debut episode required learn russian episode patient commented roughly seconds screen time took hours voice coach responsible instructing russian dialogue tested proficiency asking speak russian speaking friends telephone felt episode fathers son offered cold private character chance come vulnerable exposed raw character arc introduced informant fox_mulder david_duchovny death source letters blood dies leading mulder special representative secretary general united_nations uses diplomatic connections help mulder infiltrate russian province allowing reach site event later seen working smoking man william davis syndicate fifth season syndicate discovered betrayed providing information mulder result syndicate scientists black oil order test working create following season discovered fbi agent chamber begs help escape facility addressing giving information whereabouts mother syndicate agent acting present facility declines help pair leaves dead returns seventh season episode requiem restored health makes contact behest smoking man wishes resume work syndicate having given location downed ufo smoking man instead going fbi assistant director walter_skinner mulder inform craft later turn smoking man pushing flight stairs leaving dead series finale truth skinner seeks witness mulder trial murder skinner fails track ghost hands mulder scrap paper new address called testify speaks involvement syndicate extent pressed information continuation conspiracy mulder request dismissed stand fear certain knowledge killed reception character met generally negative criticism robert_shearman lars_pearson book wanting believe critical guide lone gunmen felt character introduction appearances added little episodes featured describing bad parody earlier characters writing cinefantastique felt acting son heart breaking sic found unfortunately simply convey plot point characters writing cinefantastique paula_vitaris noted problematic character adding breaks function plot device zack_handlen writing felt introduction ill timed noting importance death episode writer frank_spotnitz described young attractive vital dangerous compared older characters working syndicate compared character adding read saying intentions series initial broadcast run fans referred reference united_nations posting dyed hair
Marita Covarrubias