Sheppard leads a patrol to a Wraith planet where major Leonard's team got lost and McKay looks for an erratic power source. After finding Genii soldier corpses, they reach the cave where the organic Wraith generator was badly damaged. The are attacked by Leonard himself, who lost men and disabled the Stargate. McKay must repair the generator to avoid radio disturbances disabling contact with Atlantis or the Prometheus, while Becket tries to save wounded men with only a basic medical kit. Soon each human gets hallucinations and behaves dangerously erratic, except wounded Teyla, who depends on John who relives a rescue from Taliban territory trauma, for whom he mistakes Ronon, who relives a Wraith hunt. Things aren't better in the cave, where Rodney's repairs are their only hope to stop going fatally mad.
—KGF Vissers