Colonist (The X-Files)

The Colonists are an extraterrestrial species in the science fiction television show, The X-Files, as well as the first X-Files feature film. The mystery revolving around their identity and purpose is revealed across the course of the series. In the series' plot, the Colonists are collaborating with a group of United States government officials known as the Syndicate in a plan to colonize the  Earth, hence their name.