SG-1 travels back in time in a daring plan to steal a piece of Ancient technology from Ra, the powerful Goa’uld who ruled in ancient Egypt.

When President Roslin calls an Interim Quorum of the Twelve Colonies, she discovers that democracy brings its ugly stepsisters — politics and deadly intrigue — to the party. Tom Zarek, the charismatic convicted terrorist, is elected as the delegate from Sagittaron and immediately proposes elections for the vice-presidency.

Jack and Paul enlist civilian help when they must fight off soldiers sent to kill them by McLennan-Forster.

Tensions flair between Tony and Michelle as she assumes command of CTU. Sarah tests Michelle’s authority by giving her an ultimatum.

Audrey reevaluates her feelings for Jack, while Marwan sets the next phase of his plan in motion.

Plagued by terrifying nightmares, Teyla begins to recall a time when she and her father were captured by the Wraith and subjected to disturbing experiments.

While Daniel finds himself in a mysterious diner suspended between death and ascension, Jacob’s fate takes an unexpected turn, Jack and Sam consider their romantic lives, and Anubis unleashes his plan for galactic destruction.

As its fuel supply dwindles, the fleet must seek out a new supply of tylium ore or risk becoming sitting ducks to any Cylon attack. A recon patrol finds an asteroid full of the fuel, but there’s a catch — the Cylons have found it first and established a heavily guarded refining plant.

Jack and Paul visit the defense contractor who employed Marwan, but the company executives put their own interests ahead of CTU’s and take major steps to destroy evidence.

After a grief-stricken Driscoll relinquishes her command, Heller appoints Tony as interim director to oversee the latest crisis.

With a brief opportunity to send a data transmission to Earth, members of the Atlantis expedition compose video messages home to their loved ones.

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.

President Roslin’s fears that Commander Adama is a Cylon are stoked when she learns he’s making secret wireless calls to other ships. Then, to make things worse, a single Cylon raider appears near the Galactica and begins acting strangely after being damaged in battle.