While Teal'c remains captive as Apophis' prisoner, the SG-1 boards his ship to do battle with him as well as with the Replicators.
Teal'c undergoes a perilous Jaffa rite known as the M'al Sharran in order to free his mind from Apophis' control.
Carter befriends an alien who followed her from an alien world.
O'Neill refuses to abandon a mysterious member of SG-1 who may not be a member of the crew.
The SG-1 team learns their wormhole may accidentally cause the total extinction of a friendly world, but the inhabitants choose not to believe them.
Cassandra shows signs of strange new powers which jeopardize the SG-1's future as well as her own.
When Daniel learns that the Unas, including his friend Chaka, have been taken as slave labor on another planet, SG-1 attempts to rescue him, an action which could start an uprising.
SG-1 teams up with a Russian Stargate team to track down lost soldiers within an alien temple.
O'Neill tries to figure out why the Tollans have suddenly decided to allow SG-1 access to their weapons technology.
A meeting with a friendly race leads SG-1 into contact with another race that seems impossibly benign.
When Carter goes missing, O'Neill suspects she may be a subject for deadly experiments and reluctantly teams up with Colonel Maybourne to track her down.
An alien named Marty pitches an idea to a movie studio which resembles the Stargate setup, and O'Neill decides to keep tabs on him by becoming the movie's technical advisor.
O'Neill's training session with a young Stargate team is interrupted by a mission. The young cadets are brought aboard to help, only the mission turns out to be another training exercise.
Teal'c fails to appear through the Stargate network, leading the SG-1 members to attempt a rescue before time runs out.
When Osiris engages in war with the System Lords, a large peace summit is held at an armed space station, and Daniel is brought in by the Tok'ra to attend the proceedings incognito.
As the Tok'ra world is attacked, Daniel's mission to infiltrate the peace summit is disrupted by the presence of a prominent visitor.
SG-1 becomes the final defense against an asteroid's collision course with Earth.
A Jaffa rebellion leader attempts to rally his people against the Goa'uld and join forces with Earth.
SG-1 discovers a world controlled by replicators and examines its origins.
Anubis uses the lowered defense of the Shades of Grey NID team as an opportunity to attack a planet, and SG-1 turns to two convicts for help in stopping him.
While trying to stop an accident on an alien planet, Daniel is exposed to fatal radiation.
The SG-1 crew must keep the Goa'uld from obtaining Asgard technology.