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.

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.

O'Neill becomes the unwilling receptacle for a library of alien knowledge.

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.

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.

Daniel and Vala travel to Atlantis in search of Merlin's anti-Ori weapon, while Sam, and Mitchell join forces with Dr. McKay to lock out the Ori supergate.

Trapped on board the Odyssey, the members of SG-1 must live out the rest of their lives together when Carter activates a time dilation field to save the ship from destruction.

A cosmic accident causes SG-1 to be sent back 30 years into Earth's past, where they must locate the Stargate and find a way home.

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.

When the team finds Merlin himself, they must help him complete the Sangraal weapon before Adria and her Ori forces can track them down.

The members of SG-1 arrive on P3X-989 and are knocked unconscious. They wake up and return to Earth only to find that they are not quite themselves.

With SG-1 trapped on Klorel's ship, it seems that Earth is doomed as the Pyramid Ships prepare to destroy Earth.

After gating to a world on the edge of a black hole, the S.G.C. cannot disengage the Stargate. All of Earth becomes endangered by the time-distorting gravity field.

Ten years into the future, the former members of SG-1 must send a message into the past to prevent the extinction of the human race.

SG-1 is called to defend the people of Abydos from the Goa'uld once again when they learn that Anubis, in search of a powerful device, is about to attack.

When SG-1 discovers that Daniel Jackson has been turned into a Prior of the Ori, they must determine whether or not his plan to destroy the Ori is genuine.

O'Neill and Teal'c risk their lives to keep the Replicator bugs from gaining a foothold on Earth, while Carter helps the Asgard fend off a Replicator invasion.

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.

As the Ori invade the Jaffa planet Chulak, Vala and Daniel must deal with their leader: Vala's young daughter, rapidly aged by the Ori to serve their purposes.

SG-1 races against Baal in the hunt to find the Sangraal, Merlin's anti-Ori weapon, and comes up against a series of ancient trials.

SG-1 must free an alternate reality Earth from a Goa'uld invasion after duplicates of Samantha Carter and Charles Kawalsky come through the quantum mirror.

O'Neill steals technology from the Tollan, and is forced to leave the Stargate program. Maybourne offers an intriguing proposal.

SG-1 must come to the rescue of their once-powerful allies when the Goa'uld attack a secret Asgard laboratory.

The team is called into battle unexpectedly when the Asgard homeworld is overrun by Replicators -- which have evolved into a startling new form.

Carter and Teal'c go in search of the Asgard to try and save Colonel O'Neill, but discover that the Asgard's enemy has returned with a vengeance. The System Lords seek an alliance with Earth against a common enemy.