O’Neill and the team return to Cimmeria, the planet where they destroyed Thor’s Hammer to help Teal’c escape. They find that the Goa’uld have invaded and many of the people are dead. Can they help to find Thor’s weapons to fight off the invasion before they are all captured or killed?
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Episode 1
The Serpent’s Lair (3)
With SG-1 trapped on Klorel's ship, it seems that Earth is doomed as the Pyramid Ships prepare to destroy Earth.
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Episode 2
In the Line of Duty
Carter is possessed by a Goa'uld who claims to be an enemy of the System Lords.
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Episode 3
Prisoners
SG-1 is put on trial and exiled to a prison world, where a woman maintains a strange control over her fellow prisoners.
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Episode 4
The Gamekeeper
SG-1 is imprisoned in a virtual reality realm and forced to relive the worst moments of their lives over and over.
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Episode 5
Need
Jackson becomes addicted to the effects of a Goa'uld sarcophagus, and falls for the planet's manipulative princess.
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Episode 6
Thor’s Chariot
SG-1 returns to Cimmeria, and finds that without protection from the Asgard the planet has been invaded by the Goa'uld.
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Episode 7
Message in a Bottle
SG-1 discovers an ancient artifact that takes O'Neill and the S.G.C. hostage.
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Episode 8
Family
The SG-1 team attempt to rescue Teal'c's son, who has been kidnapped and brainwashed by Apophis. Teal'c learns disturbing news about his wife.
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Episode 9
Secrets
Jackson discovers that his wife has returned to Abydos, and is nine months pregnant with the son of Apophis. O'Neill must keep the secret of the Stargate program from being…
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Episode 10
Bane
Teal'c is infected with deadly venom from a giant insect, and begins a terrible transformation. When he escapes the S.G.C., SG-1 must find him before Colonel Maybourne does.
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Episode 11
The Tok’ra (1)
SG-1 locates the Tok'ra, a Goa'uld resistance movement who oppose the System Lords, and attempt to form an alliance. Jacob Carter's cancer brings him near death.
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Episode 12
The Tok’ra (2)
While SG-1 tries to form an alliance with the Tok'ra, a spy betrays the rebels to the Goa'uld. Jacob Carter finds that the Tok'ra may be his only hope of…
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Episode 13
Spirits
SG-1 finds a planet inhabited by Native American Indians, protected by spirits who are actually advanced alien shapeshifters.
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Episode 14
Touchstone
SG-1 is accused of stealing an important weather-controlling device, sending a primative planet into chaos. The team discovers that Earth's second Stargate is being misused.
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Episode 15
The Fifth Race
O'Neill becomes the unwilling receptacle for a library of alien knowledge.
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Episode 16
A Matter of Time
After gating to a world on the edge of a black hole, the S.G.C. cannot disengage the Stargate. All of Earth becomes endangered by the time-distorting gravity field.
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Episode 17
Holiday
SG-1 discovers an elderly man known for developing technology to fight the Goa'uld. Daniel is tricked into switching bodies with the man, Ma'chello, who believes he is "owed" for all…
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Episode 18
Serpent’s Song
Apophis, SG-1's greatest enemy, seeks sanctuary from Sokar and ends up near death in the S.G.C. infirmary.
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Episode 19
One False Step
A group of primitive aliens begin to fall deathly ill after SG-1 arrives.
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Episode 20
Show and Tell
A young boy arrives through the Stargate, and warns of plot by invisible aliens to kill all of the human race in order to rob the Goa'uld of potential hosts.
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Episode 21
1969
A cosmic accident causes SG-1 to be sent back 30 years into Earth's past, where they must locate the Stargate and find a way home.
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Episode 22
Out of Mind (1)
O'Neill, Carter and Jackson awaken from stasis in what appears to be the S.G.C. -- almost 80 years in the future.