Season One Children of The Gods After hostile Aliens travel through the Stargate, kill several US Airman and one other General George Hammond sends Colonel Jack O'Neill through the Stargate to Abydos in seek of Dr. Daniel Jackson. O'Neill discovers, once on Abydos, that their Stargate on Earth is only one of a vast network of Stargates.

Season Two The Tok'Ra SG-1 go in search for a Goa'uld resistance group who are known as the Tok'Ra, after Captain Carter has a vision which reveals their location. However when they discover the Tok'Ra they are reluctant to trust SG-1.

Season Three Jolinar's Memories Martouf arrives in the SGC with news of Jacob Carters capture by the Goa'uld Sokar. In order to save Jacob, Major Carter must use her memories of Jolinar to guide SG-1 and her father safely from the Hell Fires of Netu, the planet in which Jacob is held captive.

Season Four The Curse When Dr. Jacksons old Archeaology proffessor dies in a freak accident Daniel returns to his old stomping grounds. Daniel Discovers a par anceint egyptian artifacts that contain Goa'uld parasites within them. However when one of them disappears it becomes apparent that there is Goa'uld out there.