The story of Stargate SG-1 begins about a year after the events of the feature film, when the United States government learns that an ancient alien device called the Stargate can access a network of such devices on a multitude of planets. SG-1 is an elite Air Force special operations team, one of more than two dozen teams from Earth who explore the galaxy and defend against alien threats such as the Goa’uld, Replicators, and the Ori.
#2 – Lost City (1)
Season 7 – Episode 21
O’Neill goes to great lengths to keep the Ancients’ knowledge from falling into Goa’uld hands when the team discovers a second repository. The President replaces General Hammond with a civilian diplomat.
The episode was rated from 625 votes.
#3 – Window of Opportunity
Season 4 – Episode 6
O’Neill and Teal’c are caught in a time loop in the SGC, and must relive the same 10 hours over and over again.
The episode was rated from 684 votes.
#4 – The Fifth Race
Season 2 – Episode 15
O’Neill becomes the unwilling receptacle for a library of alien knowledge.
The episode was rated from 667 votes.
#5 – Reckoning (2)
Season 8 – Episode 17
The fate of the galaxy hangs in the balance as Sam and Jacob search for the only weapon capable of stopping the Replicator onslaught. O’Neill leads a defense of the S.G.C., while Daniel squares off against Replicator Carter.
The episode was rated from 507 votes.
#6 – Nemesis (1)
Season 3 – Episode 22
SG-1 faces creatures of mass destruction that even the Asgard can’t control, and must destroy Thor’s infested vessel before the Replicator bugs reach Earth.
The episode was rated from 593 votes.
#7 – Camelot
Season 9 – Episode 20
SG-1 discovers the village of Camelot on an alien world, and must face Merlin’s security system when they go in search of an Ancient weapon. Elsewhere, Earth and its allies assemble a fleet when a working Ori Supergate is discovered.
The episode was rated from 512 votes.
#8 – Moebius (2)
Season 8 – Episode 20
With the timeline changed by SG-1’s actions in the distant past, an alternate version of SG-1 must use the newly-discovered time ship to set things right.
The episode was rated from 540 votes.
#9 – Meridian
Season 5 – Episode 21
Daniel Jackson is exposed to a lethal dose of radiation while visiting an alien civilization that is building a weapon of mass destruction.
The episode was rated from 513 votes.
#10 – Within the Serpent’s Grasp
Season 1 – Episode 22
SG-1 escapes through the Stargate before it is shut down, and learns that Daniel’s alternate reality vision is true: Apophis is moving to attack Earth from above. The team must stop Apophis and his son, Klorel, who inhabits the body of their friend Skaara.
The episode was rated from 518 votes.