It's not just iconic characters like Kirk, Spock, and Janeway that have made "Star Trek" one of the best science fiction franchises of all time. It's also its memorable alien races like the Klingons, ...

Many of the most memorable Star Trekaliens debuted on the TV shows, but a handful of classic alien races made their first appearance in the movies. Airing its first episode in 1966, Star Trek: The ...