Season 3

1999 · 22 episodes

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.

1Into the Fire (2)O'Neill, Carter and Jackson must escape Hathor's clutches, while Teal'c tries to raise a Jaffa army on Chulak. General Hammond must take desperate measures to rescue the team.
2SethSG-1 must find a renegade Goa'uld who has been hiding on Earth for thousands of years.
3Fair GameThe Asgard aid Earth in negotiating a nonagression treaty with the Goa'uld System Lords.
4LegacyWhen Daniel goes insane, SG-1 must deal with the legacy of Machello's anti-Goa'uld technology.
5Learning CurveSG-1 discovers a planet where children are used to acquire knowledge for the entire population, then discarded.
6Point of ViewSG-1 must free an alternate reality Earth from a Goa'uld invasion after duplicates of Samantha Carter and Charles Kawalsky come through the quantum mirror.
7Deadman SwitchSG-1 is taken captive by an alien bounty hunter with uncertain loyalties.
8DemonsSG-1 finds a medieval Christian society terrorized by Sokar and the Unas, and is accused of being possessed by demons.
9Rules of EngagementSG-1 discovers a military camp where young men are trained to impersonate SGC personnel to infiltrate Earth.
10Forever in a DayJackson deals with the apparent death of his wife, Sha're, at the hands of Teal'c.
11Past and PresentSG-1 encounters an entire planet suffering from amnesia. The planet's leader returns to Earth with SG-1 to find a cure, but SG-1 suspects she may not be who she appears to be.
12Jolinar's Memories (1)When Major Carter's father Jacob is kidnapped by Sokar, the SG-1 team must infiltrate a prison moon designed to look like hell to rescue him.
13The Devil You Know (2)SG-1 must escape a hellish prison moon, and one of their worst enemies.
14FootholdSG-1 returns from a mission and discovers that metamorphic aliens have taken over the complex.
15PretenseThe Tollan put Skaara and Klorel on trial to determine who will control the host body.
16UrgoSG-1 receives alien brain implants that manifest themselves as a bizarre man, who tells them that they would not survive the procedure to remove him.
17A Hundred DaysAfter a meteor strike buries the Stargate, O'Neill finds himself stranded on a planet with no hope of rescue.
18Shades of GreyO'Neill steals technology from the Tollan, and is forced to leave the Stargate program. Maybourne offers an intriguing proposal.
19New GroundThe members of SG-1 are imprisoned on a planet and become pawns in a war of ideology.
20Maternal InstinctSG-1 discovers the mystical planet Kheb, and must find the Harcesis child of Apophis and Sha're before Apophis's army does.
21Crystal SkullAn alien artifact causes Daniel to disappear, and the team looks for help from his institutionalized grandfather.
22Nemesis (1)SG-1 faces creatures of mass destruction that even the Asgard can't control, and must destroy Thor's infested vessel before the Replicator bugs reach Earth.

Episodes