Colonel O'Neill, leading the new SG-1, track Apophis back to the planet Chulak to rescue Sha're and Skaara, and befriend one of Apophis' Jaffa guards.

Major Kawalsky is possessed by a Goa'uld, and the SGC must find a way to remove it without killing him.

A mysterious affliction wipes out the entire population of a planet, plus an SG team -- except for one young girl. Carter befriends her, but learns that she is being used by the Goa'uld.

SG-1 finds a planet inhabited by Native American Indians, protected by spirits who are actually advanced alien shapeshifters.

When Daniel goes insane, SG-1 must deal with the legacy of Machello's anti-Goa'uld technology.