O’Neill goes to great lengths to keep the Ancients’ knowledge from falling into Goa’uld hands when the team discovers a second repository. The President replaces General Hammond with a civilian…
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…
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.
O’Neill and Teal’c risk their lives to keep the Replicator bugs from gaining a foothold on Earth, while Carter helps the Asgard fend off a Replicator invasion.
When powerful aliens come through Earth’s Stargate, Colonel Jack O’Neill returns to Abydos to retrieve Daniel Jackson, who has discovered that the alien transit system includes much more than the…
Members of SG-1 become infected with an alien virus that turns them into primitive beings. Dr. Fraiser must find a cure to save the team and the alien population from…
During an off-world assignment, Jack is struck down by energy from a blue crystal… which creates a duplicate of him that returns to Earth in Jack’s place.
Pressed by the government to acquire new technologies, SG-1 is led to a world inhabited by a seemingly primative race. When Apophis arrives, SG-1 ambush him with disasterous consequences.
SG-1 discovers a race of attractive people who age extremely rapidly. The situation becomes personal when O’Neill begins to suffer from the same accelerated aging, and must live out the…
SG-1 tracks down Catherine Langford’s fiancee, who took the first Stargate trip in 1945, and discovers an ancient meeting hall that may hold the secrets of the universe itself.
SG-1 finds themselves stranded in a crippled ship in a distant galaxy — with Apophis threatening to destroy them. Teal’c is brainwashed and made loyal to Apophis once again.
A mysterious affliction wipes out the entire population of a planet, plus an SG team — except for one young girl. Carter befriends her, but learns that she is being…
The SG-1 team rescues a group of advanced humans from a planet near destruction, and must find a new home for the refugees before the Pentagon gets their hands on…
Colonel O’Neill and Captain Carter are separated from Jackson and Teal’c during a Stargate journey, and are trapped on a desolate ice world with no way of escape.
An alien artifact transports Daniel to an alternate reality, where he is not a part of the Stargate program and the Goa’uld — led by Teal’c — are invading Earth.