- 1 New Order (1)
-
Carter and Teal'c go in search of the Asgard to try and save Colonel O'Neill, but discover that the Asgard's enemy has returned with a vengeance. The System Lords seek an alliance with Earth against a common enemy.
Air Date: 2004-07-09
- 2 New Order (2)
-
While the Goa'uld threaten to attack Earth, SG-1 and the Asgard make a last, desperate stand against the Replicators, which have captured Major Carter and invaded the last outpost of the Asgard civilization.
Air Date: 2004-07-09
- 3 Lockdown
-
The S.G.C. is put under quarantine after a mysterious infection leaves a Russian officer in the infirmary -- but the disease may not be a disease at all.
Air Date: 2004-07-23
- 4 Zero Hour
-
General O'Neill tries to settle into his new job, but faces never-ending crises - including the capture of SG-1 by the Goa'uld.
Air Date: 2004-07-30
- 5 Icon
-
Daniel is stranded on another planet after the team's arrival on an alien world sparks a violent civil war.
Air Date: 2004-08-06
- 6 Avatar
-
Teal'c is trapped in a virtual reality simulation, in which he must defend the base from a Goa'uld super-soldier incursion.
Air Date: 2004-08-13
- 7 Affinity
-
Teal'c becomes the chief suspect in a murder investigation after he moves into an apartment off-base. Carter considers her future with Pete.
Air Date: 2004-08-20
- 8 Covenant
-
A businessman threatens to expose the secrets of alien life to the world, forcing Stargate Command to bring him into the loop.
Air Date: 2004-08-27
- 9 Sacrifices
-
The impending wedding of his son is the least of Teal'c's worries when the Hak'tyl plan an uprising against the Goa'uld Moloc, driving a wedge between Teal'c and Ishta.
Air Date: 2004-09-10
- 10 Endgame
-
The Stargate is stolen, leading SG-1 to discover that the Trust has taken control of an advanced ship in orbit. Teal'c investigates a series of wide-spread Jaffa deaths.
Air Date: 2004-09-17
- 11 Gemini
-
A duplicate of Colonel Carter seeks help from Stargate Command in defeating the Replicator Fifth, who she claims has found a way to counter the Asgard's new weapon.
Air Date: 2005-01-21
- 12 Prometheus Unbound
-
After the Prometheus responds to a distress call from a Goa'uld ship, Daniel Jackson finds himself a captive when Earth's ship is stolen.
Air Date: 2005-01-28
- 13 It's Good To Be King
-
SG-1 comes to the aid of a world about to be invaded by the Goa'uld, only to discover that the local king is Earth's Harry Maybourne.
Air Date: 2005-02-04
- 14 Full Alert
-
Relations between the U.S. and Russia are strained when Russian military leaders claim that the U.S. government has been compromised by the Goa'uld.
Air Date: 2005-02-11
- 15 Citizen Joe
-
Jack is confronted in his home by an irate barber...who claims to know everything about the Stargate project and SG-1.
Air Date: 2005-02-18
- 16 Reckoning (1)
-
The Replicators begin a systematic attack of the Goa'uld, forcing Baal to come to Earth for help. The Jaffa Resistance risk their entire movement in an attempt to retake a holy city in Baal's domain.
Air Date: 2005-02-25
- 17 Reckoning (2)
-
The fate of the galaxy hangs in the balance as Sam and Jacob search for the only weapon capable of stopping the Replicator onslaught. O'Neill leads a defense of the S.G.C., while Daniel squares off against Replicator Carter.
Air Date: 2005-03-04
- 18 Threads
-
While Daniel finds himself in a mysterious diner suspended between death and ascension, Jacob's fate takes an unexpected turn, Jack and Sam consider their romantic lives, and Anubis unleashes his plan for galactic destruction.
Air Date: 2005-03-11
- 19 Moebius (1)
-
SG-1 travels back in time in a daring plan to steal a piece of Ancient technology from Ra, the powerful Goa'uld who ruled in ancient Egypt.
Air Date: 2005-03-18
- 20 Moebius (2)
-
With the timeline changed by SG-1's actions in the distant past, an alternate version of SG-1 must use the newly-discovered time ship to set things right.
Air Date: 2005-03-25