Editing Stargate SG-1 (section)

=== Apophis Arc ===
{{Main|Apophis (Stargate){{!}}Apophis (''Stargate'')}}
[[File:NORADNorth-Portal.jpg|thumb|The [[Cheyenne Mountain Complex]] in [[Colorado]], United States is home to Earth's fictional Stargate Command in the ''Stargate'' universe.]]
The pilot episode ("[[Children of the Gods]]"), set one year after the events of the original feature film, introduces the Goa'uld [[System Lord]] [[Apophis (Stargate)|Apophis]] ([[Peter Williams (actor)|Peter Williams]]) as the main antagonist when he attacks Earth's mothballed SGC military base through the Stargate and kidnaps an airman. The SGC is brought back into action when the Stargate is revealed to be part of an interplanetary network connecting countless planets. SG teams are created to help defend Earth against the Goa'uld, who have interstellar pyramid warships and vast armies of [[Jaffa (Stargate)|Jaffa]] (hereditary slaves and human incubators to the Goa'uld) at their disposal. Earth's flagship team SG-1, which includes Apophis's defected First Prime (lead Jaffa soldier) [[Teal'c]], initiates several alliances with other cultures in the galaxy, such as the Goa'uld-like but truly symbiotic [[Tok'ra]], the advanced human [[List of recurring alien characters in Stargate SG-1#Tollan|Tollan]], the pacifist [[Nox (Stargate)|Nox]], the benevolent [[Roswell Incident|Roswell]]-alien [[Asgard (Stargate)|Asgard]] and remnants of the powerful Ancients. Another alien threat arises in the [[Stargate SG-1 (season 3)|Season 3]] finale ("[[Nemesis (Stargate SG-1)|Nemesis]]") in the form of sentient machines called [[Replicator (Stargate)|Replicators]]. Meanwhile, rogue agents of a shadowy intelligence agency on Earth, the [[NID (Stargate)|NID]], repeatedly attempt to take control of the Stargate and other alien technology. Despite Apophis's death in the [[Stargate SG-1 (season 5)|Season 5]] premiere ("[[Enemies (Stargate SG-1)|Enemies]]"), the [[Goa'uld Empire]] remains a major foe in ''Stargate SG-1'' until the end of [[Stargate SG-1 (season 8)|Season 8]].