Stargate SG-1: Season Eight

At the edge of the universe lies a gateway to adventure.

Daniel Jackson and Dr. Weir have a meeting with the Goa'uld System Lords Camulus, Amaterasu and Yu at Stargate Command, and they negotiate how best to destroy Ba'al who gained power after the defeat of Anubis. Realizing that the Goa'uld are testing Earth's newfound militaristic power, Weir orders their arrest.

Samantha Carter and Teal'c travel to the Asgard world Halla in an attempt to save Colonel O'Neill, who is still frozen in Antarctica. Replicators board Thor's ship. Thor reaches Earth and beams both Daniel and a frozen O'Neill aboard. O'Neill's mind is connected with the ship's computer in the hope that his Ancient knowledge will build a weapon to fight the Replicators.

Back on Earth, O'Neill is promoted to Brigadier General and replaces Dr. Weir as commander of the SGC. His first act is to promote Major Carter to Lieutenant Colonel. O'Neill still reports to Hammond, the new chief of homeworld security. Ba'al contacts Stargate Command and suggests an exchange of the captured SG-1 with Camulus. With the help of Camulus, a ZPM device is found and brought back to Stargate Command. Rya'c plans to marry a woman of the Hak'tyl, which makes Teal'c angry.

RepliCarter informs the SGC that Fifth has made all Replicators immune to Jack's disruptor, and promises to help them modify the weapon. In fact, her presence was needed to develop the immunity. She destroys Fifth and escapes to lead the replicators. Prometheus's crew are incapacitated and removed, except Daniel, when it is hijacked by Vala, a pirate. Vala wishes to trade the ship for Naqahdah, but Daniel succeeds in retaking control of the ship. Vala escapes. Teal'c is preparing the Jaffa rebellion to capture Dakara.

Struggling with RepliCarter, Daniel halts the Replicators long enough for Sam, Jacob Carter, and Ba'al to use a combination of the device that dials every gate in the galaxy and the Superweapon to destroy all Replicators. But RepliCarter kills Daniel Jackson. Daniel Jackson must choose death or powerless Ascension whilst Anubis plans to end all life in the galaxy using the Dakara Superweapon – until Oma Desala stops him. Jacob Carter and Selmak are in trouble. Daniel is returned to human form on Earth. SG-1 learns of a Zero Point Module in Ancient Egypt and use a Puddle Jumper they found to travel back in time.