Season 2, Episode 2 - "The Intruder"
21 July, 2005
Daedalus is infected by a Wraith computer virus. Dr McKay and his team must stop it as members of the Atlantis expedition return from Earth after a meeting at the SGC thanks to the ZPM. During the meeting at the SGC, Dr. Weir learns that the Pentagon plans to replace Major Sheppard with Colonel Caldwell.
