A team of explorers made up of soldiers and scientists travels through a Stargate, an ancient portal to other planets. They use the Stargate to explore new worlds, forge ties with friendly civilizations and protect Earth from hostile forces. The TV series is based on the theatrical film "Stargate."
With extinction imminent, the Asgard decide to hand over all of their knowledge and technology to the SG-1 team.
The SG-1 team creates an elaborate plan to use Vala as bait to capture Adria; Adria is taken captive by Ba'al.
Vala's father attempts to trade intelligence to Stargate Command for sanctuary on Earth.
When a sinister leader threatens the Jaffa nation, Teal'c must go rogue in order to stop him.
SG-1 team members must play the part of hostage-takers when inhabitants of an alien planet mistake them for rebels.
When SG-1 members undermine Netan and the Lucian Alliance, he decides to put a bounty on their heads.
Daniel Jackson asks SG-1 to help him in a plan that might be a trap; the team must save Jackson's life and try to end the war with the Ori.
An experiment gone awry leaves Carter trapped in a parallel reality under martial law.
Mitchell and Carter must protect a village from occupation by Ori soldiers.
SG-1 members work to help build the Sangraal before Adria and her Ori army can track them down.
SG-1 members begin a quest to find the Sangraal after landing on a planet where they believe it to be.
Members of the Lucian Alliance attack and board the Odyssey, and Mitchell goes undercover to track it down.
Vala gets amnesia when Trust agents working for the Goa'uld Athena capture her.
Adria leads an attack on a Jaffa planet after the Jaffa modify an ancient device to make it capable of defeating the Ori.
SG-1 tries to help Martin Lloyd with his film script as a cover story to keep the Stargate Program secret.
SG-1 tries to control a rash of brutal attacks by an alien creature.
The team makes a pact with a former enemy to fight a common foe.
The team travels to Atlantis with a new plan to defend the galaxy from the Ori.
While searching for a weapon that will defeat the Ori, the team finds a planet whose inhabitants are dying of a mysterious illness.
The team struggles to reunite after an Ori defeat.