Star Trek: 10 Alien Races That Only Appeared Once

Klingons, Borg and Jem'Hadar are well known but what of those that didn't stick around for too long?

Paramount Pictures

Across the plethora of Star Trek series, writers have created astounding worlds and with them, unique aliens, some of which we have seen again and again. A few of those have been milked to eternity and back and then there are others who like a flickering light, burned bright for 45 minutes and then were never seen again. In some cases the continuation of their story was teased and the doors left open for an elusive second appearance, while on other occasions the end titles firmly closed the book.

Star Trek's self-contained episodic nature across its shows from 1966 to 2005 provides the best chance to analyse these races. The later Alex Kurtzman era shows tend to approach arcs and connected with them, recurring characters. These tend to be familiar elements rather than inspired one-offs for Michael Westmore to imagine.

By no means is this a final set - more aliens that offered plenty of scope but fell to the kerb too early. Let's take a good look at some of the more prominent one episode creations, those which astounded fans over the multiple Star Trek series yet somehow failed to be as catchy and memorable as a grumpy Tellarite.

In this post: 
Star Trek
Posted On: 

A Star Trek fan from birth, I love to dive into every aspect of the franchise in front and behind the screen. There's something here that's kept me interested for the best part of three decades! Now I'm getting back into writing and using Star Trek as my first line of literary attack. If I'm not here on WhatCulture then you're more than welcome to come and take a look at my blog, Some Kind of Star Trek at or maybe follow me on Twitter as @TheWarpCore. Outside of writing I'm a retail who lives in the UK with my wife, our kids, dogs and cats. Sometimes I force myself not to talk about Star Trek.