The Stargate Program (SGC) is revived when Apophis, an alien of the same race as Ra, comes to Earth through the gate seeking hosts. After the attack, Colonel Jack O'Neill and new SG-1 recruit Samantha Carter are sent to Abydos to locate, and bring back, Daniel Jackson.

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

While the U.S. government determines the fate of Teal'c, SGC must deal with one of its own that has been taken over by a Goa'uld.

SG-1 visits a planet settled by the ancient Mongols, where women are treated as second-class citizens

SG-1 investigates a planet divided into a light and dark side, and ends up bringing back a plague that threatens to decimate SGC.

SG-1 goes in search of the missing SG-9, but discovers that its leader has set himself up as a god on a planet of primitives

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

SG-1 travels to a planet with a creature that possesses the power of invisibility, but run afoul of Apophis and meet the mysterious Nox.

After being greeted with open arms by the people of Argos, SG-1 discovers that not only do the Argosians suffer from rapid aging, but O'Neill has been somehow infected and will die in a few short days if they don't find a cure.

Traveling to a planet quarantined by the Goa'uld, Jack and Teal'c are trapped in an underground labyrinth.

Daniel discovers that there was a previous Stargate explorer - Dr. Ernest Littlefield, who went through the Gate in 1945. But he never returned, so SG-1 sets out to recover him.

Teal'c reveals that he has a son who is due to receive a Goa'uld larva, and asks the team to help him save his child.

After an expedition to the planet Oannes, Jack, Teal'c and Sam return...to reveal that Daniel died on the mission. But then they learn all was not it appeared to be on their mission.

The ancient Egyptian goddess and Goa'uld, Hathor, is awakened and immediately takes over SGC and all of its men

SG-1 rescues a little girl, Cassandra, but it soon turns out she is a pawn in a scheme to destroy Earth's Stargate

Teal'c is put on trial by the inhabitants of a planet where he and the Goa'uld collected humans from the planet. If he is found guilty, he will be executed.

SG-1 rescues a group of survivors from a dying planet, but finds that it must deal with its own people when military intelligence wants access to their advanced technology.

During a Stargate malfunction, Jack and Sam are redirected to an icy planet where they face a frozen death unless Stargate Command can determine their location.

SG-1 arrives on P3X-989 and are knocked unconscious - they wake up and return to Earth but something is wrong with them and they find out that they aren't exactly themselves anymore.

While investigating P3R-233, Daniel stumbles across a device that projects him into a parallel dimension. In this universe, Carter and O'Neill are engaged, and Teal'c is still First Prime of Apophis. Using the knowledge "our" Daniel has, the SGA launches a nuclear attack on Chulak through the Stargate. This results in a counter-attack as the Goa'uld send a horde of Pyramid Ships to destroy the parallel Earth, and Teal'c refuses to be swayed by those who wiped out his family. The parallel SGC (known as the SGA) must somehow dial out of their Stargate and get Daniel back to the planet so he can return to "his" universe.

Having escaped marauding Goa'ulds in another Earth reality, Daniel Jackson warns that it is only a matter of time before they launch an attack in this one. But, the Stargate program faces a more immediate threat - - this from Senator Kinsey, powerful Chairman of the Appropriations Committee and the man who oversees Stargate's multi-billion dollar budget. Kinsey sees the program as a wasteful fatcat project with dubious goals and he vows to shut it down. As he reviews the past missions with Hammond, O'Neill and the SG-1 team, he dismisses the danger presented by the Goa'uld, despite warnings from Teal'c of their power. Even Daniel's desperate warning of an imminent attack won't sway the Senator, who is determined to bury the gate and put the program out of business. (To Be Continued...)

The Stargate is being shut down by the U.S. government, despite Daniel's warning of an imminent Goa'uld attack on Earth. The SG-1 team, armed to the teeth, defy orders and make an unauthorized trip through the Stargate to what they believe to be the origin of the attack. They find themselves on a Goa'uld Pyramid Ship and discover that Skaara is aboard. Skaara was once the young Abydonian friend to O'Neill, but now is the host body to Klorel, son of Apophis. Is Skaara's human spirit still alive under that fierce exterior or has it been consumed by Klorel? The future of the SG-1 team and of Earth depend on the answer. (To Be Continued...)