Stargate: 10 Best Aliens In One Episode Only

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.

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.