Ever since their debut in Star Trek, the fearsome Borg, and their origins, have been one of the biggest mysteries of the franchise. Making their first appearance in an episode of Star Trek: The Next Generation, the Borg began as a warning from the omnipotent Q, but they quickly blossomed into full-fledged villains in their own right. Intent on assimilating all life in the galaxy, the Borg have gone to great lengths to assert their dominance in all four quadrants of the Star Trek universe. Even their infamous "resistance is futile" catchphrase has been enough to strike fear in the hearts of Starfleet crews for decades.
First seen in Star Trek: The Next Generation season 2, episode 16, "Q Who," the Borg were given a taste of the assimilation fodder in the Alpha Quadrant and spent several years traveling across the galaxy to find it. Every Star Trek: The Next Generation Borg episode portrayed the cybernetic villains as the ultimate evil, and they continued to vex other species into the 25th century in shows like Star Trek: Picard. Despite all their appearances across the franchise, many details of the Borg remain unexplained, and their beginnings are especially mysterious. Aside from their unquenchable thirst for biological diversity, the Borg's vagueness has made them all the more harrowing.
