Star Trek has one of the greatest collections of humanoid alien races in science fiction. The overwhelming majority of examples look similar, if not identical, to humans, and yet many stand out as classics. Klingons, Vulcans, Romulans, and Ferengi inspired countless other sci-fi species throughout the genre. The Kweijan are one of the newest arrivals to the franchise, and though they don't get a ton of screen time, their story is engaging.