Stargate SG-1 is a science fiction series based on the original film Stargate. It involves the team SG-1 going on various adventures to different alien worlds through Stargates. Throughout the series they encounter various alien threats and allies including but not limited to the Goa'uld and the Asgard.
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The SG-1 team extends a small time frame to several years to survive an attack of the Ori and tries to find a solution to solve their problem.
SG-1 gets caught in the middle when Ba'al and Adria compete for domination of the galaxy.
Family Ties 10x18
Vala's father Jacek contacts SGC claiming to have vital information that could impact the survival of Earth. Meanwhile, Gen. Landry's ex-wife pays a visit.
After a terrorist attack on a Jaffa summit leaves many dead and Bra'tac seriously injured, Teal'c goes on a one-man quest for revenge.
Bad Guys 10x16
SG-1 finds an alien museum on another planet but are mistaken for a bunch of rebels that have taken hostages.
Col. Mitchell returns to Kansas to attend his high-school reunion with Vala when Stargate Command learns of an attack on SG-1 team members.
The Shroud 10x14
The SG-1 team learns of yet another world that has been visited by a Prior of the Ori. However, this Prior hasn't issued any threats. The team waits for the Prior's return, only to be shocked by his identity.
The Road Not Taken 10x13
Carter ends up in an alternate universe and changes the course of things in that universe.
Line In the Sand 10x12
Mitchell, Carter and Teal'c arrive on a planet being threatened by the Ori. They decide that a line needs to be drawn and that the Ori must not be allowed to advance any further. Carter attempts to use the Ancient Merlin's technology to prevent the Ori from taking over the planet.
The Quest (2) 10x11
SG-1, Adria, and Ba'al continue their quest to search for Merlin's weapon. They defeat the dragon then SG-1 and Ba'al are transported to another planet without Adria. The team search the new location and find Merlin, but being in stasis for so long has weakened him so Merlin passes all of his knowledge on to Jackson via an Ancient device. Now Jackson must build the weapon before Adria finds them.