10 Best Sci-Fi TV Show Villains

These antagonists more than left their mark.


They say a story is only as good as your villain and when it comes to the science fiction genre, the enemies that flank the episodes are often powerful and ruthless, holding the fate of entire civilizations in their hands. They could be alien, human or something else entirely, with the sci-fi scene offering the widest range of creative choices available.

The ten foes you'll find here have made a bigger impression than most, boasting some memorable performances that enhance their individual characteristics while heightening the danger they pose.

Creating a memorable sci-fi villain is a two-fold process: on the one hand you need a solid performance from a skilled actor to bring them to life; on the other, you need to consistently make their presence felt while making them a cohesive part of the plot. TV shows give antagonists a chance to hold a commanding sway over the narrative, influencing its direction and serving a constant obstacle for the protagonist to overcome.

With one entry from franchises past and present, here are ten picks for some of the best villains in small screen sci-fi.


A tough but fair writer and critic broadly covering games, movies and just about every type of entertainment media. Spent a good part of the last seven years blogging and more recently, making amateur videos under "The Cainage Critique". You can follow my work on my website and my YouTube channel at