Back in 1969, the team goes undercover at NASA to stop Flynn from sabotaging the moon landing and killing the crew of Apollo 11.

Suffering from a fatal brain disorder, Trevor makes the choice to allow himself to be overwritten as the team races to invent an experimental cure.

When an operative of the Trust plants a bomb in Atlantis, the team must find a spy within their own ranks before the Wraith arrive and discover the city.

The Atlantis team must decide the fate of a colony of Wraith they have turned into humans. Dr. Weir must defend her leadership when she is evaluated by the I.O.A.

The team desperately attempts to stop two Wraith hive ships from reaching Earth. Sheppard must rely on an old foe to rescue McKay and Ronon.

Teal’c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station…

Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation.

“Todd” informs the Atlantis expedition that a rogue group of Wraith has acquired several Zero Point Modules to power a Super-hive, and wants it destroyed. However, after the Daedalus is…

In the city of Las Vegas in an alternate reality, police Detective John Sheppard investigates a series of bizarre murders where each body appears to have desiccated. He is soon…

Dr. Rodney McKay reluctantly returns to Earth to witness the triumph of his rival Dr. Malcolm Tunney, but must help shut down a deadly weather device when the new technology…

With a brief opportunity to send a data transmission to Earth, members of the Atlantis expedition compose video messages home to their loved ones.

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…

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.

Colonel O’Neill and Captain Carter are separated from Jackson and Teal’c during a Stargate journey, and are trapped on a desolate ice world with no way of escape.

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…

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…

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

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.

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…

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.

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.

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…

Major Kawalsky is possessed by a Goa’uld, and the SGC must find a way to remove it without killing him.

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.

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…

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

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

SG-1 encounters a young woman with the ability to control Replicators, and who may hold the key to the salvation of the Asgard.

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.

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.

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

Disaster strikes the Stargate, trapping Teal’c in transit. SG-1 must turn to Russia — and to their enemies — for help.

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

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 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.

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

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

Jackson’s teammates notice a disturbing change in him when he is reunited with the Harcesis child and given the Goa’uld genetic memory.

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.