Star Trek's One Hit Wonder Alien Species

When it comes to Trek aliens, the Klingons are as ubiquitous as the Beatles, while the Ferengi are more of “Top 40” choice, the Andorians are like an indie band, and the Romulans are whatever type of music you hate the most. But what about the one-hit wonder alien races—the species that only appeared in one episode (or movie), but who we still think about all the time? Some looked unique, others communicated or reproduced differently, and many taught us important lessons about our own humanity. Here are some of our favorite one-hit wonder species.