Not every Star Trek alien that comes across our TV screens or computer monitors can be interesting. It's just not going to happen. Ive accepted that. When creating a universe there are going to be some background aliens, those aliens that are only there to prove that there is in fact a universe. They usually have the status of background alien: they walk the halls of starships, mill around at social events or are just one of many in a crowd shot. This is forgivable. What is not forgivable are those featured aliens that make you wonder why did the writers even bother. Aliens that have so much potential but week after week, series after series, the writers refuse to fulfill. Or worse yet those aliens that are obvious plot devices to further a storyline that has nothing to do with them. These aliens usually appear for only one episode and are never seen or heard from again but they shall be immortalized on this list the 10 Dullest Star Trek Aliens.