SG-1 must stop a renegade Stargate commander, who has gone mad and set himself up as a god on an alien planet.
The team discovers a crystaline alien species with the capability of assuming human form. ONeill comes to terms with the death of his son.
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.
Origin (Part 3)
Daniel and Vala learn that their reactivation of an Ancient communications device has inadvertently exposed Earth to the wrath of a group of unforgiving deities.
SG-1 discovers a race of healthy and attractive people who suddenly begin to age rapidly. The situation becomes personal when ONeill begins to suffer from the same accelerated aging, and must live out the rest of his life on the planet.
Tealc and ONeill are transported to an underground cage designed by the Asgard to protect an alien world from the Goauld. Tealc cannot escape the labyrinth while his larval Goauld lives.
The Torment Of Tantalus
SG-1 tracks down Catherine Langford's fiance, who took the first Stargate trip in 1945, and discovers an ancient meeting hall that may hold the secrets of the universe itself.
Tealc returns to Chulak to stop his people from implanting his son with a larval Goauld, but must sacrifice himself to save him.
Fire And Water
Daniel is taken captive by an alien with a hidden agenda, while SG-1 is made to believe he is dead.
The Ties That Bind
Daniel and Vala embark on a series of missions in their quest to unlock the Jaffa device that seems to have bound them together for eternity.
The banished Goauld Hathor is found in an ancient sarcophagus Earth. Hathor takes over the SGC with hopes of raising a new army against the System Lords.
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 used by the Goauld.
Tealc must stand trial for a crime committed while he served as first prime of Apophis when a villager on an alien world identifies him as the Jaffa who killed his father.
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 them.
Colonel ONeill and Captain Carter are separated from Jackson and Tealc during a Stargate journey, and are trapped on a desolate ice world with no way of escape.
The Powers That Be
When Daniel and Vala attempt to undo the teachings of the Ori on a distant planet, they and the planet's inhabitants find themselves subject to their foe's vengeful wrath.
When SG-1 visits the underground warehouse of an advanced alien civilization, the areas caretaker transplants their minds into robotic duplicates -- a gift of immortality.
There But For The Grace Of God
An alien artifact transports Daniel to an alternate reality, where he is not a part of the Stargate program and the Goauld -- led by Tealc -- are invading Earth.
Politics (Pt 1)
Senator Kinsey arrives at the SGC to investigate the program and determine whether the great drain on the US budget is worthwhile, prompting the team to recall missions from the past year.
Within The Serpent's Grasp (Pt 2)
SG-1 escapes through the Stargate before it is shut down, and learns that Daniels alternate reality vision is true: Apophis is moving to attack Earth from above. The team must stop Apophis and his son, Klorel, who inhabits the body of their friend Skaara.
The Serpent's Lair (Pt 3)
As a fleet of Goauld warships heads toward Earth, threatening to destroy it, the Stargate facility prepares for the worst, sending the best of American society through the Stargate to a safe Alpha site.
Samantha Carter returns to SG-1 to join the team on a mission to free a distant planet from the Ori's control.
In The Line Of Duty
The SG-1 team are on a mission to Nasya, to rescue the survivors that have been attacked by the Goauld. During the rescue, Dr Carter's body is taken over by a Goauld.
While exploring a seemingly insignificant planet, O'Neill and the SG-1 team are approached by a ragged figure who pleads for their help. They try to defend him, only to discover that the man is a fleeing murderer.
The SG-1 team travel to P7J989, where they discover a garden and dome full of chambers, each containing an unconscious person. As the team inspects the chambers, they are trapped and knocked unconscious.
While exploring planet P3R 636, ONeill and the SG1 team come across what appears to be a troop of Jaffa warriors and ceremonial priests delivering Naquadah, an element treasured by the Goauld, through the Stargate.
The SG-1 team return to Cimmeria after learning that the Goauld have invaded the planet.They feel responsible as, on their previous visit they destroyed Thors Hammer, the planets main instrument of defence.
Ex Deus Machina
The team intervenes when an ongoing conflict between Gerak and Ba'al puts the United States at risk.
Message In A Bottle
While exploring a planet the SG-1 team find an orb that sends out electromagnetic signals. They think it is a time capsule and are intrigued by its power source, which seems to have lasted a millenia.
Tealcs mentor Bratac arrives unexpectedly through the Stargate with shocking news: the Goauld Apophis survived the destruction of his ship and has now kidnapped Tealcs son, Ryac.
Daniel and Tealc travel back to Abydos, as it has been a year since Daniel left to fulfill a promise he made to Shares father Kasuf. When they arrive, Daniel learns that his wife, is pregnant.
While exploring BP6-3Q1, ONeill and the SG-1 team are attacked by giant insects. The team escapes through the Stargate, but not before Tealc is stung. When Tealc returns to Earth, a strange transformation begins.
The Tok'Ra (Pt 1)
Carter has a vivid dream, in which she sees through the eyes of Jolinar, the Tokra or rebel Gouald, who briefly inhabited her body. Although her father is dying, Carter knows she must go on the mission to find Tokra.
Lt. Col. Mitchell disappears while trying to contact a band of legendary Jaffa warriors.
The Tok'Ra (Pt 2)
The Tokra have turned down ONeill and SG-1s request for an alliance against the Goauld because, as Garshaw explains, the earthlings dont offer enough rewards to justify the security breech.
The SG-11 team has not returned from its mission to Planet PXY 887, where they recently discovered an element, Trinium, that is a hundred times lighter and stronger than steel.
When a group posing as the SG-1 team steals the climate-controlling Touchstone from the planet Madrona, the planets weather deteriorates, threatening inhabitants with imminent death unless the stone is recovered.
The Fifth Race
SG-1 team travel to an ancient room that houses alien inscriptions in an attempt to decode alien languages found in a probe. When O'Neill peers through a viewer in the ancient room, he is caught in its grasp.
A Matter Of Time
While attempting to save the members of SG-10 from a black hole on planet P3X 451, the SG-1 team activates the Stargate and exposes themselves to the holes gravitational pull.
Landry and his government overseers disagree over what to do about a dangerous, genetically engineered Goa'uld creation.
When the SG-1 team stumble upon the former Goauld enemy Machello, they fall victim to his body-swapping invention. Machello takes on Daniel's body and the archeologist finds himself trapped in the body of a dying man.
Pursued by Goauld death rays, former Goauld conqueror and sworn enemy of the SGC, Apophis, throws himself on the mercy of the team. Despite his past evil, SG-1 grant him sanctuary.
One False Step
During a routine mission, the UAV plane crashes into a planet inhabited by an unusual life form. Sent to recover the plane, the SG-1 team discovers those living on the planet are friendly and far simpler than humans.
Show And Tell
A young boy gains entry to the SGC and tells the SG-1 team he has come with his mother, a member of the invisible Reetou race. The boy announces that his planet has been destroyed by the Goauld.
The SG-1 team are propelled back in time, landing in a top-secret military facility. Carrying a letter General Hammond gave her, Carter is searched by a Lieutenant who is astonished by the letters contents.
The Fourth Horseman (Part 1)
As SG-1 tries to stop the spread of a deadly virus, Gerak works to covert the Jaffa to worshippers of the Ori.
Out Of Mind (Pt 1)
Awakening from what seems like cryogenic suspension, O'Neill finds himself in a futuristic version of the SGC. He is told by doctors he has been frozen for 79 years and the rest of the SG-1 team perished long ago.
Into The Fire (Pt 2)
When SG-1 are imprisoned, General Hammond sends Colonel Makepeace on a rescue mission. O'Neill gets selected by Hathor as the host for a Goauld and Teal goes to Chulak to employ some Jaffa to help.
The Tokra believe that the ancient Goa uld System Lord, Seth is hiding on earth and passing as a religious leader. SG-1 and the Tokra Selmak must find him without falling victim to his brianwashing powers.
The extreme rivalry between the Go auld System leaders puts the future of Earth in danger.
Daniel starts to going crazy after SG-1 visits a planet where SG-1 found nine dead Goa uld. The doctors believe he is suffering from the effects of traveling through the gate.
The Fourth Horseman (Part 2)
As Gerak amasses forces to rise against them, the Stargate team races to find an antidote to stop an Ori plague from becoming a devastating global pandemic.
In the pursuit of knowledge, Jack ONeill, Teal c, and Daniel Jackson travel to the planet Orban as part of an exchange program.
Point Of View
SGC is taken aback when an alternate reality version of Samantha Carter and deceased Major Kawalsky are found in top secret Area 51. To transport themselves to Earth, they use the Quantum Mirror.
SG-1 travels to planet PJ6-877 for a routine exploration. Almost immediately after arriving, they are captured in an invisible force-field by alien bounty hunter Aris Boch.
SG-1 arrives at a medieval village and frees Mary, a woman who has been left outside tied to a stake. Simon, friar of the village and Mary's friend, explains that Mary is a sacrifice for the demon that plagues their village.
Rules Of Engagement
Upon exiting the Stargate, SG-1 finds itself in the midst of battle. A group of SG soldiers battles a Jaffa army. Believing the soldiers to be the missing-in-action SG-11 team, O'Neill and the others help assist.
Complications arise when Mitchell becomes the victim of a powerful new technology that allows individuals to share memories.
Forever In A Day
In the middle of a battlefield Daniel and Amonet meet where she uses her hand device on Daniel, and he passes out. When he awakes Amonet is dead. Daniel is depressed and resigns from the Stargate Project.
Past And Present
SG-1 travels to a planet whose inhabitants seem to be suffering from mass amnesia. They have no memory of their lives and report that their elders and children are missing.
Jolinar's Memories (Pt 1)
The Tokra come to Earth and tell Sam that her dad is being held prisoner on a planet Earth people would describe as hell. The team goes to rescue him and takes a cargo ship as there's no stargate.