Since its debut, "Star Trek" has introduced decades worth of new characters, locations, and alien races, but only a few disappeared from one day to the next.

A staple of the "Star Trek" franchise since its earliest days is its inclusion of imaginative extraterrestrial characters. Whether as members of Starfleet vessels or villains-of-the-week, the ...

Since its debut 59 years ago, Star Trek has featured some of the most iconic alien races to ever appear in science fiction. From the logical Vulcans to the warlike Klingons, the Star Trek galaxy is a ...