Stargate Atlantis Season 2 Episode 20: Allies (Part 1)
Stargate Atlantis Season 2 Episode 20: Allies (Part 1)
A Wraith faction (including Michael) contacts Atlantis to seek help in destroying their common enemies, the Wraith. Because the Wraith are currently engaged in a destructive civil war, they suggest using Atlantis’ retro-virus to turn their native foes into human prey.