Urgo

The third season of the military science fiction television series Stargate SG-1 commenced airing on Showtime in the United States on June 25, 1999, concluded on Sky1 in the United Kingdom on March 8, 2000, and contained 22 episodes. The third season follows SG-1 in their fight against the Goa'uld Empire's System Lords, the main being Sokar until "The Devil You Know" and then Apophis, after he regained power during that episode. The season introduces the long-unseen and unnamed enemy of the Asgards, the Replicators, who are self-replicating machines that seek to convert all civilizations into more of themselves, thus posing a dire threat to all other beings. The Replicators are first mentioned, but not named, in season three episode "Fair Game".

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