Stargate: 10 Best Aliens In One Episode Only

Who are the alien races who deserve a return in some form or another through the Stargate?

By Sean Ferrick /

Stargate has, in SG-1, Atlantis and Universe, offered a wide variety of exciting and frightening aliens for the audience to consume. From friendly foes to downright insane overseerers, there have been enough different encounters to rival a Saturday night in a Mos Eisley water hole.

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The main antagonists for SG-1 were, first, the Goa'uld and then later the Replicators and Ori. However, along the way they encountered dozens of other races, spread throughout the galaxy. All three series 'suffered' from television budgets, meaning that more often than not, the aliens that they encountered looked extremely like humans - with maybe a change or two in the hairstyles.

However, there were also beings like the Wraith, the Unas and the Asgard - all sporting very unique and individual looks, all of them menacing in their own way. Anyone who says an Asgard can't be frightening, watch the Atlantis episode 'The Lost Tribe'!

Some aliens in the franchise, for one reason or another, ended up appearing only once, despite the potential to appear again and again. Whether the reason behind this was budget, or simply a lack of interest from the writers, is unclear. Yet, this list gathers up the 10 best and most striking aliens who only appeared in one episode.

10. Orbanians

The Orbanians are a race of humans who inhabit the planet Orban, who are of Tiotihuacan descent. These people have a very dark way of educating their race, something that requires great sacrifice from their children.

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The Urrone are a group of children who are implanted with millions of nanites, and then they become experts and leaders in their respective fields. Once they have learned and understood everything that they can, they go through the Averium - a ceremony wherein their nanites are removed and spread throughout the population.

This news devastates Teal'c, who had grown close to a child Tomin, who subsequently underwent this procedure - leaving him a smiling, mindless form. O'Neill argues that this is barbarism, yet is unable to prevent the child to whom he had grown close, Merrin, from undergoing the same procedure.

This is one of the many times that a successful civilization comes at too high of a cost for SG-1 to bear.

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