While the original series, Stargate SG-1 ... 6 would be greenlit during the production of Season 5, the producers attempted to convince MGM and Syfy to extend the fifth season from 20 to 22 episodes.

Egeria was first mentioned in Stargate SG-1 season 4, episode 4, "Crossroads," but she appeared for the first time in season 6, episode 10, "Cure." This was when SG-1 discovered that Ra had ...