The Stargate crew returns to Earth to face and eliminate a replicator bug that has made its way onto a Russian submarine. Carter is taken to Thors home planet to help defeat the replicators for good.
The Other Side
SG-1 is sent out on a humanitarian mission to help the inhabitants on the plant Euronda. Upon their arrival they find a civilisation devastated by war and a leader desperate to make a deal.
A Tokra representative brings a mysterious armband device to SG-1, which supposedly enables super-human powers. ONeill, Carter, and Daniel volunteer to test the device but realise they are being tested and involved in what could be a suicide mission.
SG-1 meet with ShanAuc, a seemingly lost love of Tealc, who claims to have discovered a method to defeat Goauld by learning to communicate with her symbiote.