The Ori succeed in having a permanent beachhead in this galaxy by completing a supergate becomes active in this episode.
The Korolev, the third space carrier built by the U.S. and turned over to the Russians in order to keep their gate, makes its first appearance in this episode.
Beau Bridges (General Landry) does not appear in this episode.
[Jackson drops a book onto the floor]
Jackson: (to Mitchell) Sorry to wake you.
Mitchell: (Startled awake) No, ah, I wasn’t sleeping. I was Kel'nor'eem'ing. Teal’c taught me the fundamentals.
Jackson: Did he mention you should stay conscious in the process?
Mitchell: Yeah, I’m still working on the basics.