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.
3 - 1Into the Fire (2) Jun. 25, 1999
3 - 2Seth Jul. 02, 1999
3 - 3Fair Game Jul. 09, 1999
3 - 4Legacy Jul. 16, 1999
3 - 5Learning Curve Jul. 23, 1999
3 - 6Point of View Jul. 30, 1999
3 - 7Deadman Switch Aug. 06, 1999
3 - 8Demons Aug. 13, 1999
3 - 9Rules of Engagement Aug. 20, 1999
3 - 10Forever in a Day Oct. 08, 1999
3 - 11Past and Present Oct. 15, 1999
3 - 12Jolinar's Memories (1) Oct. 22, 1999
3 - 13The Devil You Know (2) Oct. 29, 1999
3 - 14Foothold Nov. 05, 1999
3 - 15Pretense Jan. 21, 2000
3 - 16Urgo Jan. 28, 2000
3 - 17A Hundred Days Feb. 04, 2000
3 - 18Shades of Grey Feb. 11, 2000
3 - 19New Ground Feb. 18, 2000
3 - 21Crystal Skull Mar. 03, 2000
3 - 22Nemesis (1) Mar. 10, 2000