: A recurring Wraith known as "Todd" returns to propose a dangerous collaboration to fix a malfunctioning virus meant to stop the Replicators.
: Adding to the tension, Richard Woolsey arrives on Atlantis to conduct a high-stakes three-month evaluation of Colonel Carter’s leadership. [S4E8] The Seer
: The guest character, Davos, shows McKay a vision of an ambush and later shows Colonel Carter a horrifying future where Atlantis is destroyed by an Asuran-built battleship. : A recurring Wraith known as "Todd" returns