An unstoppable energy weapon leaves Atlantis under siege after Earth launches a preemptive attack against a very powerful enemy’s homeworld.

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.

The Daedalus arrives to defend Atlantis from the Wraith onslaught, but it may not be enough when the team discovers that an even larger armada is on the way.

The Atlantis team finds a culture that lives in relative safety from the Wraith, because they hand over their criminals to the Wraith — and crash-land in the volatile penal…

Tensions rise between the Tok’ra and rebel Jaffa at the S.G.C.’s offworld base when they are attacked by an invisible enemy.

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.

While searching for the Lost City of the Ancients on a distant planet, SG-1 is stunned to find Daniel Jackson alive and in human form but stripped of his memory….