Stargate SG-1 picks up a year after the conclusion of the events recounted in the original feature film.
SG-1 and a dozen other SG teams venture to distant planets using an alien portal known as a Stargate, which in the series is housed in a top-secret United States Air Force military base known as Stargate Command in the underground Cheyenne Mountain Complex in Colorado Springs, Colorado.
In the first eight seasons, the mission of the SG teams is to explore the galaxy and search for alien technology and allies to defend Earth against the Goa’uld, a snake-like parasitic alien race from planet P3X-888 that takes humans as unwilling hosts. The Goa’uld had transported human slaves from Earth to other habitable planets across the galaxy thousands of years ago and now pose as gods of Ancient Egypt.
SG-1 eventually learns that highly evolved human-like beings, known as the Ancients, had originally built the Stargate network millions of years earlier, before ascending to a higher plane of existence, after which they pledged not to interfere in the lives of other species. The Ori, a faction of the same race as the Ancients who instead use their powers to subjugate other species by religious indoctrination, assume the role of the main antagonists in Season 9 and Season 10.
