The team desperately attempts to stop two Wraith hive ships from reaching Earth. Sheppard must rely on an old foe to rescue McKay and Ronon.

While being evaluated by the International Oversight Advisory, Richard Woolsey meets a beautiful scientist new to Atlantis, who is not what she appears. Meanwhile, Lt. Colonel John Sheppard is captured and tortured by an enemy he thought he'd killed several years ago: his sworn enemy, Genii Commander Acastus Kolya.