The SG-1 is infiltrated in the middle of the population of a planet recently dominated by the Ori. Out of the blue, they are beamed up to the Odyssey that has detected a wave of radiation approaching the planet. Soon they witness that all the people including the Prior and the Ori warriors have been destroyed. Soon Sam and Teal'c conclude that the Jaffa may have used the Ancient superweapon kept in Dakara. The SG-1 decides to inspect the Ori warship but they stumble upon Jaffa warriors. Out of the blue, Adria comes to the room where Vala and Daniel are and shows her evil power. Meanwhile Gen. Landry goes with Bra'tac to meet the new Jaffa leader Se'tak and discuss the genocide of the humans.
"Counterstrike" is a good episode of "Stargate SG-1", with the presence of the gorgeous Brazilian Morena Baccarin in the role of the evil Adria. The conclusion with the destruction of the superweapon and the problem with the Jaffa leadership seems to be a future problem to the SGC. My vote is six.
Title (Brazil): "Counterstrike"