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 Original Series represented a major shift in science fiction because of its emphasis on a utopian view of the future. The crew of the USS Enterprise was made up of humans from various backgrounds, and even featured a few aliens as well. Unlike other sci-fi franchises, Star Trek's aliens were diverse and weren't always the villain of each episode.
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