| Enemies |
5.01 |
| 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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| Threshold |
5.02 |
| 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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| Ascension |
5.03 |
| 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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| The Fifth Man |
5.04 |
| 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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| Red Sky |
5.05 |
| 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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| Rite of Passage |
5.06 |
| Cassandra mysteriously falls ill, sending SG-1 back to her home planet -- where they uncover a dark Goa'uld secret.
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| Beast of Burden |
5.07 |
| SG-1 discovers a civilization that uses Unas as slave labor, and attempt to liberate Daniel's friend, Chaka.
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| The Tomb |
5.08 |
| SG-1 teams with a Russian unit when one of their Stargate teams goes missing in a mysterious alien ziggurat.
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| Between Two Fires |
5.09 |
| The Tollan offer Earth advanced weapons technology, prompting a secret investigation on Tollana -- one that leads to a startling discovery.
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| 2001 |
5.10 |
| SG-1 encounters a potential new, technologically advanced ally in the war against the Goa'uld -- though they do not know the Aschen's dark secret.
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| Desperate Measures |
5.11 |
| 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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| Wormhole X-Treme! |
5.12 |
| 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.
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| Proving Ground |
5.13 |
| 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 SGC.
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| 48 Hours |
5.14 |
| Disaster strikes the Stargate, trapping Teal'c in transit. SG-1 must turn to Russia -- and to their enemies -- for help.
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| Summit |
5.15 |
| The Tok'ra war with the Goa'uld escalates, and the rebel faction sends Daniel Jackson to a secret meeting between the System Lords. The Goa'uld invade the Tok'ra homeworld.
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| Last Stand |
5.16 |
| Dr. Jackson's undercover mission to a Goa'uld summit is complicated by the arrival of a surprise guest. The rest of the team face a full-scale invasion of the Tok'ra homeworld.
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| Fail Safe |
5.17 |
| 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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| The Warrior |
5.18 |
| 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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| Menace |
5.19 |
| 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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| The Sentinel |
5.20 |
| SG-1 must turn to a pair of convicted criminals to save a world from annihilation by the Goa'uld.
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| Meridian |
5.21 |
| 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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| Revelations |
5.22 |
| 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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