The Stargate theme music can be heard in the background at the cocktail party Sam attends.
The original script had William Devane reprising his role as President Hayes, but he was unavailable. Instead, the script was revised and a darker version of Hank Landry became the U.S. President and Don S. Davis (General Hammond) was brought back for one final episode. Devane returns as President Hayes in another alternate timeline in Stargate: Continuum (2008).
Teal'c uses the excuse that he must go spar with Sgt. Siler. Dan Shea, who plays Sgt. Siler, is a stunt coordinator and stunt double for the series.
Stargate: Atlantis (2004) characters Dr. Rodney McKay and Major Evan Lorne make their final appearances in this series.