Fair Game.

Asgard leader, Thor, tells O'Neill that the Goa'uld System Lords plan to attack Earth, and offers help in negotiating a peace deal. Three System Lords attend the session, Yu, Nirrti, and Cronos the Lord responsible for killing Teal'c's father. The three initially agree to the Asgard's peace proposal on the condition that Earth gives up the Stargate. But when Teal'c and Cronos are discovered badly beaten.

Teal'c is blamed and the two remaining Lords vow to attack Earth as retribution. Despite Nirrti's claim that she tried the healing technique on Cronos and it didn't work, Carter uses it and manages to save the Lord. Realizing that Nirrti orchestrated the beating to seize power, Yu and Cronos turn their rage toward their former comrade, giving Earth a temporary reprieve.