With the Stargate being shut down, SG-1 decide to take one last trip through the 'gate to stop the Goa'uld attack that is imminent.

The Stargate program faces an immediate threat - - from Senator Kinsey, a man who sees the program as wasteful. 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.

While investigating P3R-233, Daniel stumbles across a device that projects him into a parallel dimension. 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.

SG-1 arrives on P3X-989 and is knocked unconscious - they wake up and return to Earth only to find that they are robots.

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 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.

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

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

After an expedition to the planet Oannes, Jack, Teal'c and Sam return...to reveal that Daniel died on the mission.

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.

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.

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

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.

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.

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 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.

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

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.

The System Lord Apophis launches an attack through the Stargate, tucked away by the military after the events of the movie, and the SGC program is reactivated and given a new objective - seek out and find the alien invaders and defeat them. Jack O'Neill is called out of retirement and sent to locate Daniel Jackson on Abydos.