In this episode, Thor refers to the new Asgard home planet, Orilla, as being "rich in neutronium" on which both Asgard and humaniform replicator technology is based. As the term is commonly used, neutronium consists entirely of neutrons, and, if it exists, weighs somewhere around a half-billion tons per tablespoon. If neutronium existed on a planet, nothing would prevent it from sinking to the core of the world. Neutron stars, or pulsars, are believed to be solid neutrons and the densest bodies in the universe short of black holes. Since neutrons can be produced by known nuclear processes, it is far more likely that neutronium is something that would be manufactured rather than found.
When Jack was frozen in the Ancient outpost, his jacket's collar was folded down, but when he was transported to Thor's ship, his collar was folded up.
Weir: That's the bright side?
Daniel: More of a slightly less dark side.
Daniel: I guess you did learn something from your father's poker games.
Weir: Always bet big when bluffing.
Daniel: I just didn't know you were looking to become a System Lord.
Carter: I know. So, you wanna talk?
Teal'c: Concerning what subject?
Carter: I dunno. How's Rya'c?
Carter: You still keeping in touch with Ishta?
Teal'c: Bra'tac is well.
Carter: C'mon, Teal'c, throw me a bone here!
Teal'c: How is Pete Shanahan?
Carter: He's fine.
Weir: I was never good at bluffing.
Daniel: Trust me you better learn quick because if they learn we can't use the Ancient weapon to defend ourselves this game is over! (Weir stares at him) Too much?
Thor: The mass of Replicator blocks has begun moving away from the event horizon.
Sam: How is that possible?
Thor: They have the time dilation device, I do not know exactly how, but they seem to have used it to counteract the gravitational effects that should be pulling them in.
Sam: Frightening... not only that they can do that, but that you don't know how.
Thor: I agree.
Thor: Time space distortions caused by the black hole have been interfering with my ship's long-range communications.
Teal'c: Indeed. To some.
Daniel: And the last one is Lord Yu?
Daniel: Every joke, every pun, done to death, seriously.
Daniel: The System Lords can't be trusted, either as a group or individuals. They're posturing egomaniacs driven by an insatiable lust for power - each one capable of unimaginable evil.
Weir: See, why should I be nervous? Sounds like an average day at the United Nations.
Richard Dean Anderson (Jack O'Neill) does not appear in this episode.
At some point in this season, they change Walter Davis's name to Walter Harriman because there is an actual USAF officer with the name Walter Davis. This was actually changed in Season 6, but the patch of his uniform was not fixed. You can tell by looking at his nametag, it changes from having two words (Walter Davis) on the top line to having one long word (Harriman) on the top line.
Kira Clavell (Amateratsu) auditioned for the role of Teyla Emmagen in Stargate: Atlantis.
Slightly new footage in the opening credits, including Christopher Judge's cast picture showing him with his new 'do. Don S. Davis also no longer appears in the credits or stars in the series.
All guest cast and co-stars are listed for both episodes, although some only appear in one part or the other.
As the season premiere on SciFi USA, this episode and the next one, New Order (2), aired as a single two-hour "event" and were preceded by a "Making of..." hour-long feature on the series and its spinoff, Stargate: Atlantis. For subsequent repeats the episodes were divided with pre- and post-credits for both.
The Asgard fleet is now primarily made up of O'Neill class starships.
Richard Dean Anderson, Amanda Tapping, Christopher Judge and Gary Jones are the only actors to appear in the first eight season premieres.
This episode marks the debut of Torri Higginson as Dr. Elizabeth Weir. She takes over the role from Jessica Steen, who played the character in the seventh season finale, "The Lost City."
Steve Bacic previously played Major Coburn in "Maternal Instinct" and "The First Ones."
This episode shares many connections/similarities to the third season episode "Fair Game." In both episodes, three of the System Lords, one of whom is Yu, visit Earth, Sam gets a promotion, the Asgard play a large part as do the Replicators, whose existence was first hinted at in "Fair Game." and both episodes first aired on 9 July (in 1999 and 2004 respectively).
As of season eight, Yu is the longest-running Goa'uld recurring character. He first appeared in the season three episode "Fair Game" and is the only major Goa'uld from that point who is still alive.
Thor's new ship is called the Daniel Jackson.
Shinto Sun goddess, traditionally the Japanese royal family are her descendants.