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.

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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.

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An alien being is smitten with Carter and follows her back to Earth, assuming human form and pursuing a relationship with her.

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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.

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SG-1 discovers that their trip through the Stargate may have inadvertently doomed an entire civilization, and plead with the Asgard for assistance.

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Cassandra mysteriously falls ill, sending SG-1 back to her home planet where they uncover a dark Goa'uld secret.

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SG-1 discovers a civilization that uses Unas as slave labor, and attempt to liberate Daniel's friend, Chaka.

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SG-1 teams with a Russian unit when one of their Stargate teams goes missing in a mysterious alien ziggurat.

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The Tollan offer Earth advanced weapons technology, prompting a secret investigation on Tollana one that leads to a startling discovery.

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SG-1 encounters a potential new, technologically advanced ally in the war against the Goa'uld though they do not know the dark secret of the Aschen.

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When Major Carter is kidnapped by a terminally ill man who intends to use a Goa'uld symbiote to save his life, O'Neill is forced to team up with an old foe to find her.

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An alien ship approaches Earth, sending SG-1 to an old friend for some answers where they discover that Martin Lloyd has created a TV show about the Stargate program.

This is the 100th episode.

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SG-1 trains a team of raw cadets, and Colonel O'Neill is forced to take them into a real-life battle situation when he learns of a possible alien incursion at the S.G.C.

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After an accident with the Stargate traps Teal'c in transit, SG-1 must turn to Russia and to their enemies for help before time runs out.

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The Tok'ra send Daniel Jackson to a secret meeting between the System Lords, unaware that a new power is about to attack the Tok'ra homeworld.

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Dr. Jackson's undercover mission to a Goa'uld summit is complicated by the arrival of a surprise guest. Meanwhile, the rest of the team is buried under the surface of the Tok'ra homeworld after a Goa'uld attack.

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Earth finds itself threatened by something even larger than the Goa'uld when the team learns that an asteroid is on a collision course with the planet.

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A charismatic Jaffa leader seeks to forge an alliance between Earth and his rebel followers, winning the allegiance of Teal'c and Bra'tac.

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SG-1 encounters a young woman with the ability to control Replicators, and who may hold the key to the salvation of the Asgard.

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SG-1 must turn to a pair of convicted criminals to save a world from annihilation by the Goa'uld.

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Daniel Jackson is exposed to a lethal dose of radiation while visiting an alien civilization that is building a weapon of mass destruction.

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SG-1 must come to the rescue of their once-powerful allies when the Goa'uld attack a secret Asgard laboratory.

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