"Twilight" is the eighth episode of the third season of the American science fiction television series Star Trek: Enterprise, originally broadcast on November 5, 2003. It was the sixtieth episode of the series overall. It was written by co-producer Michael Sussman, and directed by former Star Trek: Voyager actor Robert Duncan McNeill.

Starfleet is a fictional organization in the Star Trek media franchise. Within this fictional universe, Starfleet is a uniformed space force maintained by the United Federation of Planets as the principal means for conducting deep space exploration, research, defense, peacekeeping, and diplomacy. While most of Starfleet's members are human and it has been headquartered on Earth, hundreds of other species are also represented. Most of the franchise's protagonists are Starfleet commissioned officers.