
The Tollan offer Earth advanced weapons technology, prompting a secret investigation on Tollana — one that leads to a startling discovery.
SG-1 teams with a Russian unit when one of their Stargate teams goes missing in a mysterious alien ziggurat.
SG-1 discovers a civilization that uses Unas as slave labor, and attempt to liberate Daniel’s friend, Chaka.
Cassandra mysteriously falls ill, sending SG-1 back to her home planet — where they uncover a dark Goa’uld secret.
SG-1 discovers that their recent trip through the Stargate may have inadvertently doomed an entire civilization.
O’Neill and Lieutenant Tyler are ambushed by Goa’uld forces and trapped behind enemy lines — while the rest of their team discover they don’t know who Tyler is.
An alien being is smitten with Carter and follows her back to Earth. It assumes a human form and pursues a relationship with her.
His mind altered by Apophis, Teal’c must undergo a ritual that takes him to the edge of death itself, in order for him to rediscover who he is.
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.
SG-1 helps to evacuate the Tok’ra to a new base — but matters are complicated when a spy reveals their location to Apophis. The team attempts a daring plan to take out the Goa’uld’s powerful fleet.
SG-1 must rescue an alien world from the Goa’uld — with help from an unexpected source. Teal’c seeks revenge on the System Lord Cronus for the murder of his father.
The SGC is invaded by an alien life force that takes up residence in the base computer system — and in Major Carter.
Carter must help keep a promising young cadet from throwing away a future at the SGC. O’Neill and Teal’c encounter a dangerous life form at an offworld research base.
SG-1 finds a deserted Goa’uld palace, where a beautiful device causes suicidal tendencies.
Jackson’s teammates notice a disturbing change in him when he is reunited with the Harcesis child and given the Goa’uld genetic memory.
Ten years into the future, the former members of SG-1 must send a message into the past to prevent the extinction of the human race.
SG-1 must adjust to a new commanding officer when General Hammond steps down — but O’Neill discovers foul play behind the general’s resignation.
SG-1 must stop Apophis and Heru-ur from forming an alliance of their powerful forces, while Teal’c is captured and tortured by the Goa’uld.
When his former mentor dies, Dr. Jackson returns to his roots — and discovers an ancient Egyptian artifact containing a Goa’uld parasite.
A test gone wrong leaves Jack and Teal’c marooned in space aboard a damaged prototype attack ship
SG-1 investigates a conspiracy theorist who has detailed knowledge of the Stargate program.
The members of SG-1 are used as forced labor in an underground alien facility after their memories are erased by the ruling elite.
SG-1 is caught in a conflict between two civilizations trying to colonize the same planet.
Dr. Jackson is taken captive by an Unas while on an archaeological dig. The SGC mounts a rescue operation, but discovers a danger of their own.