After Daniel's leave, season 6 finds SCG confronting a new menace in the form of System Lord Anubis. A bad news is coming along with Master Bra'tac: Teal'c's wife is deathly ill, and Teal'c leaves to be with her. Shortly thereafter, the gate is opened but nothing comes through. Then Carter discovers a very low power signal that is gradually forming a massive power enough to blow the Earth away.