The Stargate base is put in deadly peril when it is contaminated with a dangerous infection which causes its victims to become mindlessly animalistic brutes.

When Jack is injured unintentionally by a crystal alien, the alien duplicates Jack's form and out of fear of retribution tries to heal Jack. He returns to Earth in place of Jack, while Jack is still unconscious on the planet, to find the one thing he feels will accomplish this; the one thing that cannot be found again. Meanwhile, the 'real' Jack has returned and is trying to convince SGC that he is who he says he is.

On the planet Argos, Kynthia seduces Colonel O'Neill, which gives him an Argosian lifespan of only a 100 days. As he begins to age rapidly, will the SG-1 team succeed in finding a cure?

It is time for Teal'c's son Rya'c to have his Prim'ta. Can Teal'c stop his son from being implanted with a Goa'uld and becoming a slave to Apophis?

O'Neill, Carter and Teal'c return through the Stargate shell-shocked and distressed to announce that Daniel Jackson was killed. But Jackson was captured by the last survivor of an aquatic race, who planted false memories in the other members of SG1. Can the team remember and return to rescue Daniel?

The Goa'uld Hathor (one of the mothers of all Goa'uld), brainwashes the men of the SGC with pheromones, and nearly makes Jack a host to a larva conceived with Daniel. She flees after the unaffected women of Stargate Command retake the facility.

On an astronomical black hole observation mission, SG-1 finds a fatal bacterial mass-epidemic on a planet where the natives told then-incredulous Daniel months ago that the coming solar eclipse would bring disaster. They also take back to the Cheyenne Mountain Base a surviving, fairly healthy, orphaned young girl named Cassandra, and awakes Sam's maternal instinct. The Naquadah traces found in her blood turn out to have made her immune, but after she has a seizure they are diagnosed to constitute a huge bomb, somehow triggered by rescuing her; the whole thing must be planned as a 'Trojan Horse' by the Goa'uld. Sam takes the prospect of sacrificing Cassie personally and is prepared to take personal risks.

After arriving on P3X-989, the team are rendered unconscious. When they wake, they return to Earth, but soon find out that they are androids. The team must return to the planet to find out what happened to their real bodies.

The Stargate team must justify the project's continuation when a doubtful senator, Head of the Congressional Military Appropriations Committee, comes to review the project's performance.

Samantha Carter becomes the host of a Goa'uld when she was trying to save the life of the previous host.

Exploring a strange and beautiful garden, SG-1 comes across a dome containing a race that are connected to machines. The team are captured by the machines and rendered unconscious, but awake to find themselves reliving pivotal moments of their lives, over and over again. Then they discover it is virtual reality and a mysterious keeper appears to persuade them to try different outcomes for the moments. But can the team escape his clutches, when they don't know what is real and what is not?

While walking through a forest on another planet, Jackson saves the life of a beautiful princess who is about to kill herself. SG1 is taken prisoner, but Daniel is freed by the ruler when he finds out that he saved his daughter. The rest of SG1 is sent to work in the mines for the rest of their lives. Jackson falls in love with the princess, but also becomes intoxicated by frequent use of a Sarcophagus. Will he come to his senses before the rest of SG1 are worked to death?

SG-1 discovers an ancient artifact and brings it back to the SGC. Ariving at the SGC, it becomes active, pins O'Neill to the gate room wall, and unleashes a virus into him.

Teal'c's son Rya'c is kidnapped by Apophis and SG1 tries to rescue him. When Rya'c is recovered he denounces his father and helps to capture the team. They escape, but will they be able to return to Earth and cure Rya'c?

While exploring a new planet, Teal'c is stung by a giant insect whose venom causes a terrifying transformation.

SG-1 travels to a planet whose people are allies of the Asgard.

Stargate Command opens a wormhole to a planet with a black hole in orbit.

Daniel falls victim to an invention that swaps his body with that of a dying man.

Following on a Tok'ra tip, SG-1 goes to a planet where they find the hated Apophis, nearly dying and under attack by death-gliders. They get back with him, realizing he was tortured by a rival system-lord with lasting harm. Apophis demands sanctuary, provided Dr. Fraiser can save his life, at least on account of the human host, but without a sarcophagus the prognosis for his symbiont is lousy; he offers all his Goa'uld knowledge in exchange for a new host, i.e. his life, revealing he was defeated by the terrible Sokar, once supreme system lord till an alliance lead by Ra and Apophis unseated him. The confrontation with Daniel, on account of Amaunet/Sha're and their son Klorel, and with former prime Teal'c, is bitter for all three. The Tok'ra send Martouf to warn the Tau'ri must hand over Apophis, but their warning is ignored- until Sokar proves he can bombard the iris with accelerated particles and ultimately cut through it, so the White House orders his extradition, but before they can he dies, unlike his host, an Ancient Egyptian temple scribe of Amun.

While testing new technology, a UAV malfunctions and crashes on a planet. SG-1 goes to determine the cause of the malfunction, but discovers that their presence may be causing serious injury to the planet's primitive inhabitants.

When an incoming wormhole is established at the SGC, the iris is over-ridden and opened. A young boy appears and tells the SGC that they are in terrible danger from a group of terrorists. But these terrorists are invisible creatures and they are determined to wipe out all humans to prevent them being used as hosts to the Goa'uld.

Colonel O'Neill awakens and is told by new staff everything in the SGC is different because he was just revived after 79 years of cryogenic hibernation, as sole survivor of a disastrous SG-1 mission on a Goa'uld-ruled planet. He accepts to undergo a 'high tech hypnosis' to retrieve information of use in the present war against them, which is going badly, involving earth's ten endangered colonies on other planets. However Major General Trofsky, the new base commander, and his female assistant tell Daniel and Sam, in different sections, that each of them is the sole survivor: it's all make-believe to probe their brains about the weaknesses of earth and the Alliance of the four races. Meanwhile, Teal'c awakes on earth, where it took Dr. Frasier months to save him from death; there was no trace of his teammates, and he resigns when General Hammond refuses permission to keep searching. O'Neill hears Goa'uld language, gets himself free and discovers he's on a fake SGC, frees Sam and Daniel, only to be stopped by the female Goa'uld system-lord Hathor, who employs both Horus and Serpent Jaffa and demands the humans' help against her rival system-lords.

The Asgard and three Goa'uld System Lords meet at Stargate Command to negotiate a treaty modification, but subterfuge and treachery threaten not only the success of the negotiations, but Earth itself.

When the SG-1 team discover a sealed chamber of nine dead Goa'uld, Daniel Jackson is exposed to the parasites that killed them and threaten to drive him insane.

While employing the help of a planet's highly intelligent children for a project, the team discovers their horrific imposed fate when they reach a certain age.

Alternate reality versions of Kawalsky and Carter are caught at Area 51 after coming through the quantum mirror.

SG-1 come across another SG team being attacked by Jaffa. They offer to help but are shot by the SG team members. When they awake, they find out that the other SG team are Jaffa, loyal to Apophis, who are planning to infiltrate Earth. Can SG-1 convince them that Apophis is dead before the Jaffa fight to the death?

Responding to a help cry from Kasuf, SG-1 and more USAF wipe out a Goa'uld Jaffa guard to save most of the slaves on Abydonia. When Amaunet turns her hand device on Daniel, he can't bring himself to shoot his beloved wife Sha're, but Teal'c saves him by fatally staff-shooting her, and Abydononian funeral tradition squashes his hope of a sarcophagus resurrection. Crushed by grief, Daniel has apparitions of Sha're and, once released from hospital, resigns from SGC claiming the quest for his wife was his reason to join. Daniel's former research assistant, Dr. Robert Rothman, succeeds him in SG-1; but Jack is sure he'll be back. Sha're (or Amaunet's posthumous manual spell?) keeps appearing to Daniel life-like, telling him to forgive Teal'c and together find their boy who, as Harsisis, has all the Goa'uld knowledge in his genetic memory, which, to the Goa'uld, means he must be killed. Daniel agrees to return, but has a secret agenda, too.

The team discovers an early industrial world suffering from collective amnesia and has no elderly people.

An alien incursion takes control of the base.

The SG1 team embark on a trip to visit a planet with an idyllic beach, but as soon as they step through the stargate, they find they are back in the SGC. They thought that they just left, but have been missing for hours. They soon discover that an alien device has been implanted in their brains and a being called Urgo reveals himself to the team. But no one else can see him and he is extremely irritating. Will they be able to extract him before they lose their minds?

After a cataclysmic meteorite bombardment, Col. Jack O'Neill finds himself stranded on a primitive planet with its Stargate apparently permanently inaccessible.

Col. O'Neill is dismissed from the SGC for stealing alien technology, and is subsequently approached to participate in an even more covert Stargate operation.

While redialing old Stargate addresses, the SGC discovers that a gate that was previously buried has become uncovered. They send a probe through and find two archaeologists. However, when they travel through the Stargate, they find that it is located in a society in civil war: one continent believes that the people were created by a Goa'uld, whilst their enemy believes that humans arrived from another planet - by the Stargate. O'Neill, Carter and Jackson are captured by the authorities and questioned, but Teal'c is wounded and blinded. Can he help SG-1 escape the hostiles and get back through the Stargate?

SG-1 believes they have finally found Kheb, a planet with a temple where they believe the child of Apophis and Sha're, a Harcesis with all the knowledge of the Goa'uld, is being held.

The SGC send a MALP to a huge pyramid and inside they discover a crystal skull like the one Jackson's grandfather found many years before. SG1 visit the planet and whilst Daniel is looking into the eyes of the skull, as his grandfather did, an energy field envelops him. Teal'c fires his Zat at the skull, but Daniel has disappeared. Carter collapses and the team minus Daniel return to the SGC. Teal'c returns to collect the crystal skull, but will he be able to find Daniel?

SG-1 has to deal with a Replicator infestation on a Russian sub on Earth while Major Carter advises the Asgard about combating the menace in their galaxy.

The SGC is visited by a Tok'ra named Anise who brings some armbands used by the soldiers of a long extinct race, which are supposed to increase the abilities of the wearers. O'Neill, Carter and Jackson put the armbands on and it increases their physical strength, but it also causes them to make rash decisions. Can they get the armbands off before they cause their deaths?

An old love of Teal'c approaches the SGC and the Tok'ra claiming that her Goa'uld symbiote has been convinced to defect with their help.

When an SG-team member tries to assassinate the Tok'ra leader, it is believed that some of the SGC have been converted into Za'tarc - programmed assassins. The Tok'ra Freya comes to the SGC with Martouf to try and test all SG-team members. But the Za'tarc detector suggests that O'Neill and Carter are actually Za'tarcs. Is this correct and is there another Za'tarc at the SGC?

Col. O'Neill and Teal'c realize they and their friends are trapped in a time loop.

The SG-1 team awake to find they have lost their memories. They believe they are workers in an underground power station. They are told that they are helping to preserve life during an ice age. In truth, they are slave labor to a huge domed city above. When Teal'c starts to recover his memory and is given another amnesia treatment, he forgets his Kelno'reem and starts to die. Will the others recover their memories in time to save him?

The SGC is contacted by a strange man called Martin, a conspiricist who believes he is an alien. The question is, how does Martin know about the Stargate and how come he has a gate address and is he being drugged by others?

When one of Daniel's professors dies in a lab explosion which might be related to the Goa'uld, he comes back to Chicago to investigate what really happened.

In 2010, Robert Kinsey is president of a brave new world since he concluded the alliance with the Aschen, a race discovered by SG-1 which lets humanity enjoy its far advanced science and technology, including a vaccine against aging. Sam is now a civilian scientist, married to ambassador Joe Faxon, whose only worry is failing to get pregnant. When she double-checks the Aschen doctor Mollem's computer with Dr. Fraser, who felt superfluous given superior medicine, they discover human fertility is down 90% worldwide in three years. Sam, Daniel and Teal'c turn to retired general Jack, who always warned against handing over technological control, for a daring plan to turn the clock back like general Hammond did once, sending a message to their past with the exact time of a solar flare, which Sam can calculate using the Aschen computer. Only one ingredient is out of their reach: the GDO device to control the Stargate's iris, which is in the White House. Sam implores her husband Joe to steal it, but he has a secret as well as sincere objections.

When a "chosen" boy found on planet Abydos is brought to SGC, he sends a telepathic message, causing Daniel Jackson's personality to undergo disturbing changes. Will the rest of SG-1 be able to solve the mystery of the boy's origin before he becomes a power-hungry warmonger?

SG-5's Lieutenant Barber commits suicide by jumping into the Stargate shortly after a mission on a planet where a palace abandoned by the Goa'uld about 200 years ago is being studied by Daniel. Soon after, Daniel develops violent mood swings and is committed to a hospital with a neurotransmitter brain condition, presumed fatal after all the other SG-5 members die. Meanwhile, SG-3 has visited the planet, finding only the light installation Daniel reported as particularly fascinating and a human teenage boy, Loran, who hid from Daniel's expedition, but now tells Jack he was left there by his parents, scientific researchers. Back in SGC, Jack also develops symptoms. Sam and Dr. Fraiser conclude that it must be some addiction linked to the light, so when Daniel is nearly terminal Jack, who might not have been exposed too long himself, must bring him back. Jack insists they try turning off the light, and leans on Loran, who is looking for a father-figure; he even gives Teal'c an early "birthday present," but has a dark secret.

When the SGC probes a new planet, an alien energy entity there responds by invading the SGC's computer systems, and then Major Carter herself.

To help Teal'c's mind clear again, SG-1 asks Bra'tac to help. Bra'tac removes Teal'c's Goa'uld and Teal'c is forced to remember certain memories of his past in order to get back to the real Teal'c in the end. SG-1 is glad to have him back.

After being rendered unconscious during an expedition, Carter's subsequently-ordered furlough is interrupted by a mysterious being with a message and growing affection for her.

When SG-1 flees from an expedition with Col. O'Neill and some mysterious team member named Tyler, whom no one else knows about, stranded, the fitness of the team is questioned.

When Cassandra collapses at home, she is taken to the SGC for treatment. A retrovirus is causing her to emit an EM field and she expresses a need to return to her planet for an initiation ritual. SG-1 investigates and finds a Goa'uld laboratory, probably having belonged to Nirrti, meant for experimentation on the planet's population. They find that the ritual is part of the experiment, a time when Nirrti studies her subjects and cures them when she is done. SG-1 has found a way to cure Cassandra, but now all that remains to be found is Nirrti.

Carter gets kidnapped and taken to an abandoned hospital where two doctors work to study the remains of Jolinar. She finds out that they have a Goa'uld, taken from the Russians, which they are planning to put inside a man named Adrian Conrad to heal his sickness. They need Carter to tell them how to get the Goa'uld out after he's healed. O'Neill believes the government is involved with Carter's disappearance and contacts Maybourne. Together, with Daniel and Teal'c, they find Carter but also find out that the Goa'uld has escaped inside Conrad's body.

A strange ship is headed towards Earth, and the SGC suspects that Martin Lloyd and his companions may have something to do with it. O'Neill is sent to speak to Martin and is assigned as a military consultant on Martin's new show, "Wormhole X-Treme!", which uncannily resembles SG-1 despite Martin once again losing his memory. His former shipmates stall Carter and Daniel by throwing them off the trail and into the hands of the NID.

A large asteroid is discovered on a collision course with Earth.

On an alien planet, SG-1 discovers an inactive android is the only survivor of the destruction of her civilization. They bring her back to the SGC for study and manage to reactivate her. Things take a turn for the worse when she "makes" a replicator bug for Daniel.

As Jackson suffers from a fatal dose of radiation, he struggles with the value of his life while his friends deal with the emotional and diplomatic repercussions.

While still dealing with the loss of Daniel Jackson the SGC is contacted by the Asgard who require assistance dealing with Anubis, who seems to have new shield technology that can repel Asgard weapons.

The SG-1 team travels to the Antarctic science station when the scientists there discover an ancient body in the ice. The age of the ice core samples would indicate that the body predates mankind. As they thaw the body, it comes to life. It's a young woman who they call Ayiana. As Ayiana gains strength, those around her all fall ill having contracted an unknown virus which they believe Ayiana carried. The new arrival also shows healing powers and can seemingly cure any illness just by touch. As she does so however she weakens to the point of death. In the end, only Col. O'Neill remains untreated and SGC seeks the help of the Tok'ra who offer an unexpected solution.

O'Neill's symbiont Kanan drags him to a planet ruled by the Goa'uld Ba'al, where Kanan was undercover. Ba'al captures and tortures O'Neil, whose only hope may lie with - Daniel Jackson?!?

Stargate Command is approached by representatives of Jonas Quinn's home planet seeking military hardware. Their world is divided into three territories and there is a long history of war among them. Jonas' country fears that the other two territories are about to sign a non-aggression pact thus making them vulnerable to attack. In return for arms, they are offering an abundance of Naquadria. SGC isn't about to get involved in what amounts to a civil war but there's another possible outcome when Jonas' one-time professor, Doctor Kieran, tells them of an underground movement ready to overthrow the government and seek out a lasting peace. SG-1 travels to Jonas Quinn's home planet to obtain information on the situation there but not all is as it seems.

The Tok'ra are forced to evacuate their newly established base under attack from the Goa'uld. They flee to the SGC's Alpha site. Tensions rise between the allied factions, the Free Jaffa, Tau'ri, and Tok'ra. Jacob and Selmak feel the end of the Tok'ra is near and Sam finds a Naquadah generator has been sabotaged to function as a bomb. Jack suspects the recently arrived Tok'ra and attempts to weed out the traitor.

SG-1 makes first contact with the planet Pangar. It seems to be a peaceful world that have recently discovered ancient Goa'uld ruins. They offer Earth their greatest discovery, a drug called Tretonin, which they say keeps them entirely disease free. In return, they want the gate addresses for specific worlds, most of which turn out to be Goa'uld home worlds. An investigation further reveals that the wonder drug is based on Goa'uld symbiotes and the Pangarans reveal another secret - they have a symbiote queen, found in the ancient ruins. When a Pangaran guard is seriously injured, SG-1 asks the Tok'ra for help. They soon realize that the queen is the founder of their race.

SG-1 brings back an Ancient device, the purpose of which is unknown. When Jonas touched it the device activated. Upon reaching the SGC Jonas sees a large red insect fly into a wall, but no one else can confirm his sighting. The SGC is put into lockdown, but nothing is found. Jonas suspects that the Ancient device is causing his hallucinations, but to his dismay it is set to be shipped to Area 51. When Teal'c and Jack see the bugs as well, General Hammond decides to let Jonas take a crack at deciphering the Ancient text on the device.

Senator Kinsey is shot in the chest at a public event, killing him just before his party's presidential nomination. Jack is arrested for the murder, and General Hammond assigns the rest of SG-1 to uncover the truth.

The Russian SG team brings back a man who claims that his people are being experimented on by Nirrti. SG-1 investigate where the experiments are conducted, with the Russian SG team as backup. The inhabitants worship Nirrti as their god and savior from a terrible plague. SG-1 attempts to use the same device Nirrti used on the people to reverse the mutations, but the people turn on them at the arrival of Nirrti.

Teal'c is having strange nightmares featuring Apophis in which he is human and a firefighter with the rest of his team alongside him.

On a routine mission, SG-1 encounters a civilization desperate to be freed from the clutches of a Goa'uld. While on the planet, Jonas falls ill and is suspended from active duty. His mysterious illness is diagnosed as a brain tumor but gives him the unbelievable ability to glimpse the future, a future where O'Neill and SG-1 are walking into a trap!

A group of nomads on an alien planet find Daniel Jackson naked in the middle of ruins and take him in. Jonas translates the tablet Daniel said was important and discovers that it describes the last city the Ancients were building before the plague. He surmises that the list of addresses Jack put into the computer while storing the Ancient data were Ancient outposts in temporal order. Thus the last of the addresses should be the "City of the Lost". SG-1 visits the planet and happens upon the nomadic people, now inhabiting the ruins of the Ancient city. There they find Daniel, but discover his memory is gone. They must recover his memories in order to discover the secret to defeating Anubis.

A teenage boy shows up at the SGC claiming to be Jack O'Neill. He recalls a dream in which an Asgard was studying him. They determine that they must find this Asgard to fix what has been done to Jack.

In a firefight with Jaffa, Teal'c takes a staff blast to the gut. Without his symbiote, he cannot regenerate as he once did. Daniel feels that he cannot remember something important, so he goes searching through the logs for any sign of his lost knowledge. Teal'c expresses his feelings that the Tritonin has made him weak.

While exploring a crashed alien ship full of passengers in cryostasis, an alien force has downloaded a number of their consciousnesses into Daniel.

After being saved by a group of free female Jaffa, SG-1 is taken to the females' home world to meet their leader, Ishta. Ishta proposes an alliance between her all-female rebel group, Haktil, and the Tau'ri. The Tau'ri offer her Tretonin to supplant their practice of taking the symbiotes from defeated Jaffa in the service of the Goa'uld. However, since Tretonin has only had two test subjects, Teal'c and Bra'tac, they are cautious to spread it among their ranks.

The president has asked that a documentarian go to SGC to create a film about its operations. His arrival is unwelcome to most and he begins to clash with the base personnel. Nevertheless, he conducts his interviews with SG-1 and the scientists in the employ of SGC. Meanwhile, an off-world SG team finds the remains of an Ancient city.

The documentarian still a thorn in their side, SGC encounters an unforeseen predicament. With half of SG-13 off-world engaging enemy Jaffa, SG teams 1, 5, and 7 go in as backup. In the midst of heavy fire, O'Neill takes a staff blast to the chest. Many deaths from the encounter hit SGC hard and Senator Kinsey orders a full investigation into the matter.

The newly inaugurated President of the United States is briefed by the Head of the Joint Chiefs of Staff on the Stargate program. Former Senator, now Vice President, Kinsey attempts to get his running mate to back his policies for the program, but the president decides to look into the situation himself. Kinsey gets Richard Woolsey to convince the president of his agenda.

SG-1 returns early from a mission only to realize that they and Gen. Landry aren't on the same page as far as the the mission they've just completed is concerned. The confusion is quickly resolved when the "real" SG-1 returns at the correct time. Dr. Lam examines them all and concludes that they are identical and thinks they might be clones. Sam however thinks they may have come from a parallel universe as the result of the black hole they created when they destroyed the Ori beachhead. As more SG-1 teams arrive from other alternate universes, one of them includes Dr. Fraiser and another includes the Tok'ra Martouf. It's left to Sam and Martouf to find a way to send them all home.

The documentarian still a thorn in their side, SGC encounters an unforeseen predicament. With half of SG-13 off-world engaging enemy Jaffa, SG teams 1, 5, and 7 go in as backup. In the midst of heavy fire, O'Neill takes a staff blast to the chest. Many deaths from the encounter hit SGC hard and Senator Kinsey orders a full investigation into the matter.

When Cassandra collapses at home, she is taken to the SGC for treatment. A retrovirus is causing her to emit an EM field and she expresses a need to return to her planet for an initiation ritual. SG-1 investigates and finds a Goa'uld laboratory, probably having belonged to Nirrti, meant for experimentation on the planet's population. They find that the ritual is part of the experiment, a time when Nirrti studies her subjects and cures them when she is done. SG-1 has found a way to cure Cassandra, but now all that remains to be found is Nirrti.

The president has asked that a documentarian go to SGC to create a film about its operations. His arrival is unwelcome to most and he begins to clash with the base personnel. Nevertheless, he conducts his interviews with SG-1 and the scientists in the employ of SGC. Meanwhile, an off-world SG team finds the remains of an Ancient city.

SG-1 returns early from a mission only to realize that they and Gen. Landry aren't on the same page as far as the the mission they've just completed is concerned. The confusion is quickly resolved when the "real" SG-1 returns at the correct time. Dr. Lam examines them all and concludes that they are identical and thinks they might be clones. Sam however thinks they may have come from a parallel universe as the result of the black hole they created when they destroyed the Ori beachhead. As more SG-1 teams arrive from other alternate universes, one of them includes Dr. Fraiser and another includes the Tok'ra Martouf. It's left to Sam and Martouf to find a way to send them all home.

When SG-1 flees from an expedition with Col. O'Neill and some mysterious team member named Tyler, whom no one else knows about, stranded, the fitness of the team is questioned.

While exploring a crashed alien ship full of passengers in cryostasis, an alien force has downloaded a number of their consciousnesses into Daniel.

On an astronomical black hole observation mission, SG-1 finds a fatal bacterial mass-epidemic on a planet where the natives told then-incredulous Daniel months ago that the coming solar eclipse would bring disaster. They also take back to the Cheyenne Mountain Base a surviving, fairly healthy, orphaned young girl named Cassandra, and awakes Sam's maternal instinct. The Naquadah traces found in her blood turn out to have made her immune, but after she has a seizure they are diagnosed to constitute a huge bomb, somehow triggered by rescuing her; the whole thing must be planned as a 'Trojan Horse' by the Goa'uld. Sam takes the prospect of sacrificing Cassie personally and is prepared to take personal risks.

The SGC is visited by a Tok'ra named Anise who brings some armbands used by the soldiers of a long extinct race, which are supposed to increase the abilities of the wearers. O'Neill, Carter and Jackson put the armbands on and it increases their physical strength, but it also causes them to make rash decisions. Can they get the armbands off before they cause their deaths?

The SG-1 team travels to the Antarctic science station when the scientists there discover an ancient body in the ice. The age of the ice core samples would indicate that the body predates mankind. As they thaw the body, it comes to life. It's a young woman who they call Ayiana. As Ayiana gains strength, those around her all fall ill having contracted an unknown virus which they believe Ayiana carried. The new arrival also shows healing powers and can seemingly cure any illness just by touch. As she does so however she weakens to the point of death. In the end, only Col. O'Neill remains untreated and SGC seeks the help of the Tok'ra who offer an unexpected solution.

In 2010, Robert Kinsey is president of a brave new world since he concluded the alliance with the Aschen, a race discovered by SG-1 which lets humanity enjoy its far advanced science and technology, including a vaccine against aging. Sam is now a civilian scientist, married to ambassador Joe Faxon, whose only worry is failing to get pregnant. When she double-checks the Aschen doctor Mollem's computer with Dr. Fraser, who felt superfluous given superior medicine, they discover human fertility is down 90% worldwide in three years. Sam, Daniel and Teal'c turn to retired general Jack, who always warned against handing over technological control, for a daring plan to turn the clock back like general Hammond did once, sending a message to their past with the exact time of a solar flare, which Sam can calculate using the Aschen computer. Only one ingredient is out of their reach: the GDO device to control the Stargate's iris, which is in the White House. Sam implores her husband Joe to steal it, but he has a secret as well as sincere objections.