"Teliko" (Season 4, Episode 3), directed by James Charleston and written by Howard Gordon, follows Mulder and Scully as they investigate the mysterious deaths of men suffering from rapid pigmentation loss. The 1996 episode tackles themes of xenophobia and immigration through a "monster of the week" narrative featuring a unique biological antagonist. For a detailed summary and analysis, visit Wikipedia . "The X-Files" Teliko (TV Episode 1996) - IMDb