SG-1 discovers Daniel Jackson alive and living on an alien world, with no memory of who he is. The team hatches a plan to lure Anubis into a trap and destroy his new super-weapon.

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

A teenage boy shows up at the S.G.C. claiming to be Jack O'Neill, sending the team on a mission to uncover his true identity.

After an injury, Teal'c must put aside his self-doubt when SG-1 launches a mission to rescue his son and his mentor from a Jaffa death camp.

The team gates to a climate-controlled environment amidst a toxic wasteland, whose people are all linked to a central computer.

When SG-1 finds a crashed alien space ship, Daniel's mind is taken over by its disembodied passengers.

When Earth's attempts to exploit a newly-discovered naquadah mine are thwarted by a tribe of indigenous Unas, SG-1 must turn to an old friend for help.

Major Carter joins an alien pilot for a space race, but the rest of the team discovers that on this world there is more at stake than the finish line.

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.

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

While the S.G.C. investigates a seemingly unstoppable new enemy soldier engineered by Anubis, Daniel leads a team in search of an alien device in Central America.

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's super-soldier facility.

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

When the Kelownans discover that a massive underground vein of naquadah is being converted into naquadria, Jonas Quinn seeks help from Earth in avoiding the total destruction of his planet.

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.

Earth's secret off-world base is attacked by Anubis's forces, and Major Carter finds herself being hunted by the enemy. General Hammond and Jacob Carter make an unnerving discovery about the Earth-Tok'ra alliance.

A film crew arrives to document the work of the S.G.C. for eventual disclosure to the public, but finds that the base's personnel are less than eager to participate.

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.

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

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

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

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.