Anubis begins a systematic assault on Earth, and the planet's only hope of salvation depends on whether SG-1 can find the Ancients' mythical Lost City.

O'Neill and Teal'c are caught in a time loop in the SGC, and must relive the same 10 hours over and over again.

O'Neill becomes the unwilling receptacle for a library of alien knowledge.

O'Neill goes to great lengths to keep the Ancients' knowledge from falling into Goa'uld hands when the team discovers a second repository. The President replaces General Hammond with a civilian diplomat.

Trapped on board the Odyssey, the members of SG-1 must live out the rest of their lives together when Carter activates a time dilation field to save the ship from destruction.

SG-1 discovers the village of Camelot on an alien world, and must face Merlin's security system when they go in search of an Ancient weapon. Elsewhere, Earth and its allies assemble a fleet when a working Ori Supergate is discovered.

SG-1 faces creatures of mass destruction that even the Asgard can't control, and must destroy Thor's infested vessel before the Replicator bugs reach Earth.

The fate of the galaxy hangs in the balance as Sam and Jacob search for the only weapon capable of stopping the Replicator onslaught. O'Neill leads a defense of the S.G.C., while Daniel squares off against Replicator Carter.

Daniel and Vala travel to Atlantis in search of Merlin's anti-Ori weapon, while Sam, and Mitchell join forces with Dr. McKay to lock out the Ori supergate.

SG-1 is called to defend the people of Abydos from the Goa'uld once again when they learn that Anubis, in search of a powerful device, is about to attack.

SG-1 is called into action while a film crew is documenting the Stargate program, but the S.G.C. comes under investigation after the mission goes terribly wrong.

When SG-1 discovers that Daniel Jackson has been turned into a Prior of the Ori, they must determine whether or not his plan to destroy the Ori is genuine.

While Daniel finds himself in a mysterious diner suspended between death and ascension, Jacob's fate takes an unexpected turn, Jack and Sam consider their romantic lives, and Anubis unleashes his plan for galactic destruction.

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.

SG-1 races against Baal in the hunt to find the Sangraal, Merlin's anti-Ori weapon, and comes up against a series of ancient trials.

O'Neill and Teal'c risk their lives to keep the Replicator bugs from gaining a foothold on Earth, while Carter helps the Asgard fend off a Replicator invasion.

With SG-1 trapped on Klorel's ship, it seems that Earth is doomed as the Pyramid Ships prepare to destroy Earth.

SG-1 must free an alternate reality Earth from a Goa'uld invasion after duplicates of Samantha Carter and Charles Kawalsky come through the quantum mirror.

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

O'Neill steals technology from the Tollan, and is forced to leave the Stargate program. Maybourne offers an intriguing proposal.

When the team finds Merlin himself, they must help him complete the Sangraal weapon before Adria and her Ori forces can track them down.

While the Goa'uld threaten to attack Earth, SG-1 and the Asgard make a last, desperate stand against the Replicators, which have captured Major Carter and invaded the last outpost of the Asgard civilization.

With the timeline changed by SG-1's actions in the distant past, an alternate version of SG-1 must use the newly-discovered time ship to set things right.

SG-1 escapes through the Stargate before it is shut down, and learns that Daniel's 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.

An alien artifact transports Daniel to an alternate reality, where he is not a part of the Stargate program and the Goa'uld -- led by Teal'c -- are invading Earth.

Carter and Teal'c go in search of the Asgard to try and save Colonel O'Neill, but discover that the Asgard's enemy has returned with a vengeance. The System Lords seek an alliance with Earth against a common enemy.

SG-1 returns to Cimmeria, and finds that without protection from the Asgard the planet has been invaded by the Goa'uld.

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.

Ten years into the future, the former members of SG-1 must send a message into the past to prevent the extinction of the human race.

Carter must find a way to save Earth from total destruction at the hands of the Goa'uld, who have turned the Stargate into a doomsday bomb. Rya'c joins his father on a mission to destroy the Goa'uld weapon.

The team is called into battle unexpectedly when the Asgard homeworld is overrun by Replicators -- which have evolved into a startling new form.

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 survival

The Tollan put Skaara and Klorel on trial to determine who will control the host body.

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

When powerful aliens come through Earth's Stargate, Colonel Jack O'Neill returns to Abydos to retrieve Daniel Jackson, who has discovered that the alien transit system includes much more than the two planets.

Multiple SG-1s show up at Stargate Command, leading the "real" team to conclude that they have each been inadvertantly displaced from different parallel realities.

The team returns to Jonas' homeworld when they learn that the Goa'uld are after its naquadria. When Jonas is captured by Anubis, Daniel is his only hope.

SG-1 travels back in time in a daring plan to steal a piece of Ancient technology from Ra, the powerful Goa'uld who ruled in ancient Egypt.

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.

After the Prometheus responds to a distress call from a Goa'uld ship, Daniel Jackson finds himself a captive when Earth's ship is stolen.

The Asgard aid Earth in negotiating a nonagression treaty with the Goa'uld System Lords.

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.

The Replicators begin a systematic attack of the Goa'uld, forcing Baal to come to Earth for help. The Jaffa Resistance risk their entire movement in an attempt to retake a holy city in Baal's domain.

SG-1 boards an abandoned Goa'uld mothership that has mysteriously arrived in Earth's orbit, and must escape the doomed vessel when it crashes into the ocean.

A Tok'ra archaeologist arrives at the SGC with newly discovered technology, giving the SG-1 team superhuman powers.

A news reporter threatens to expose a top-secret military project, but when Carter and Jonas give her a tour of the X-303, they discover that she is a pawn in a much larger plot.

SG-1 helps to evacuate the Tok'ra to a new base -- but matters are complicated when a spy reveals their location to Apophis. The team attempts a daring plan to take out the Goa'uld's powerful fleet.

As the Ori invade the Jaffa planet Chulak, Vala and Daniel must deal with their leader: Vala's young daughter, rapidly aged by the Ori to serve their purposes.

O'Neill seeks help from a former comrade to rescue Daniel and Dr. Lee, who have been kidnapped in Central America. Carter, Teal'c and Jacob infiltrate Anubis' super-soldier facility.

While searching for the Lost City of the Ancients on a distant planet, SG-1 is stunned to find Daniel Jackson alive and in human form but stripped of his memory. O'Neill convinces Daniel to return with them to the SGC, where he is reinstated for a daring mission to destroy Anubis' powerful new super-weapon!

As the Ori plague spreads rapidly, SG-1 hopes that the Prior who caused the disease may hold the key to its cure. Gerak tries to rally the Jaffa to the Ori's cause, prompting Teal'c and Bra'tac to initiate a resistance.

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.

Samantha Carter returns to Stargate Command when the Ori seize control of a planet, using an expanding force field to gain a foothold in our galaxy.

SG-1 tracks down Catherine Langford's fiancee, who took the first Stargate trip in 1945, and discovers an ancient meeting hall that may hold the secrets of the universe itself.

O'Neill, Carter and Jackson must escape Hathor's clutches, while Teal'c tries to raise a Jaffa army on Chulak. General Hammond must take desperate measures to rescue the team.

The Tok'ra war with the Goa'uld escalates, and the rebel faction sends Daniel Jackson to a secret meeting between the System Lords.

Tragedy reunites Teal'c with his son, who blames him for the death of his mother. O'Neill and Carter launch a risky plan with untested technology when Earth comes under attack by the Goa'uld.

SG-1 hatches an elaborate plan to try and capture Adria, using Vala as bait.

SG-1 returns from a mission and discovers that metamorphic aliens have taken over the complex.

Colonel O'Neill, leading the new SG-1, track Apophis back to the planet Chulak to rescue Sha're and Skaara, and befriend one of Apophis' Jaffa guards.

An alien artifact causes Daniel to disappear, and the team looks for help from his institutionalized grandfather.

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

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.

Earth is infected with a deadly Ori plague, prompting an ally from SG-1's past to come to their aid. Gerak proposes that the Free Jaffa follow the Ori religion.

Senator Kinsey arrives at the SGC to investigate the program and determine whether the great drain on the U.S. budget is worthwhile, prompting the team to recall missions from the past year.

An alien civilization is forced to reconsider their views on women when Carter rebels against their social customs.

A group of primitive aliens begin to fall deathly ill after SG-1 arrives.

General Hammond and the Pentagon reveal the existence of the Stargate to other world governments, and must defend the fact that the program is operated by the United States military.

SG-1 investigates a secret N.I.D. laboratory, where a ruthless scientist has used cloning technology to create a Goa'uld-human hybrid.

Jackson becomes addicted to the effects of a Goa'uld sarcophagus, and falls for the planet's manipulative princess.

SG-1 finds a deserted Goa'uld palace, where a beautiful device causes suicidal tendencies.

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 returns to Earth with a piece of technology that allows them to see alien creatures everywhere, and must attempt to contain the problem when it spreads beyond the base.

The SGC is invaded by an alien life force that takes up residence in the base computer system -- and in Major Carter.

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.

SG-1 finds a medieval Christian society terrorized by Sokar and the Unas, and is accused of being possessed by demons.

SG-1 discovers a military camp where young men are trained to impersonate SGC personnel to infiltrate Earth.

The newly-elected president is debriefed about the Stargate program, and Vice President Kinsey makes a new play for control of the program.

Earth provides sanctuary for Vala's estranged, con artist father after he provides intel about a Jaffa plot to attack the planet.

A near-death trial causes Teal'c to imagine his life as very different from the one he knows, where he is a normal person living on Earth -- until he can no longer distinguish reality.

Carter is injured when the Prometheus is attacked by an unknown ship, and awakens to find herself stranded alone in deep space.

Daniel is taken captive by an alien with a hidden agenda, while SG-1 is made to believe he is dead.

SG-1 is imprisoned in a virtual reality realm and forced to relive the worst moments of their lives over and over.

The impending wedding of his son is the least of Teal'c's worries when the Hak'tyl plan an uprising against the Goa'uld Moloc, driving a wedge between Teal'c and Ishta.

Teal'c discovers a world where people are being savagely attacked by an elusive creature, leading SG-1 to a stunning discovery about its potential origin.

The banished Goa'uld Hathor is found in an ancient sarcophagus Earth, and takes over the S.G.C. with hopes of raising a new army against the System Lords.

Martin Lloyd seeks out SG-1 for assistance when his failed TV show based on the real Stargate program becomes a feature film.

Jackson deals with the apparent death of his wife, Sha're, at the hands of Teal'c.

When Carter goes missing, O'Neill teams up with Col. Maybourne again to free her.

SG-1 discovers that their recent trip through the Stargate may have inadvertently doomed an entire civilization.

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

Daniel is stranded on another planet after the team's arrival on an alien world sparks a violent civil war.

O'Neill, Carter and Jackson awaken from stasis in what appears to be the S.G.C. -- almost 80 years in the future.

Jonas' people ask Earth for military aid in an impending war with their rival nations, but his former mentor offers another solution: a resistance movement ready for a coup.

Jack is confronted in his home by an irate barber...who claims to know everything about the Stargate project and SG-1.

When SG-1 travels to an Asgard Protected Planet, Colonel Mitchell is accused of a murder he did not commit.

Teal'c becomes the chief suspect in a murder investigation after he moves into an apartment off-base. Carter considers her future with Pete.

A businessman threatens to expose the secrets of alien life to the world, forcing Stargate Command to bring him into the loop.

SG-1 finds a planet inhabited by Native American Indians, protected by spirits who are actually advanced alien shapeshifters.

When a terrorist attack decimates a Jaffa summit Teal'c strikes out on a quest for revenge, believing that the perpetrator is one of his own pupils.

Relations between the U.S. and Russia are strained when Russian military leaders claim that the U.S. government has been compromised by the Goa'uld.

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 the good he has done.

The members of SG-1 are used as forced labor in an underground alien facility after their memories are erased by the ruling elite.

Members of SG-1 become infected with an alien virus that turns them into primitive beings. Dr. Fraiser must find a cure to save the team and the alien population from whom it was contracted.

The team finds a fugitive colony of Jaffa women, who must prey on other Jaffa to acquire symbiotes.

Colonel O'Neill is trapped on an alien planet with Maybourne, and must fight to stay alive as his companion becomes increasingly paranoid.

When Ba'al comes to Earth seeking help, Stargate Command must capture his clones and determine which one is the genuine article.

An alien being is smitten with Carter and follows her back to Earth. It assumes a human form and pursues a relationship with her.

During an off-world assignment, Jack is struck down by energy from a blue crystal... which creates a duplicate of him that returns to Earth in Jack's place.

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

Teal'c returns to Chulak to stop his people from implanting his son with a larval Goa'uld.

SG-1 attempts to save a planet's inhabitants from Nirrti's genetic experimentation, but find themselves to be her next victims.

An S.G.C. scientist creates a computer virus to be used to disable enemy Stargates -- but succeeds in shutting down the entire gate network.

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

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.

SG-1 investigates when evidence suggests that there are still Goa'uld hiding on Earth -- including a former System Lord. Tensions between Earth and the Free Jaffa continue to mount.

Carter, Teal'c and Jonas investigate the death of a scientist with connections to the Goa'uld, and find a small town whose citizens harbor a dark secret.

Jackson and Mitchell must join Vala on an interplanetary scavenger hunt when they learn that they are still bound together by an alien energy field.

SG-1 discovers a race of attractive people who age extremely rapidly. The situation becomes personal when O'Neill begins to suffer from the same accelerated aging, and must live out the rest of his life on the planet.

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 Goa'uld.

A tour of an off-world research base for a group of foreign diplomats turns dangerous when an insidious insect species gets loose.

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

SG-1 must find a renegade Goa'uld who has been hiding on Earth for thousands of years.

Daniel is plagued by dreams of his former girlfriend, who has been taken as a Goa'uld host. Samantha Carter begins a romantic relationship with a detective, from whom she must hide her life at Stargate Command.

Carter must help keep a promising young cadet from throwing away a future at the SGC. O'Neill and Teal'c encounter a dangerous life form at an offworld research base.

When Daniel goes insane, SG-1 must deal with the legacy of Machello's anti-Goa'uld technology.

Teal'c 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.

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