First episode to play Carry On Wayward Son during the "Road So Far" recap sequence. This is also the only season to use the song in an episode other than the finale.
In the digital copies of this episode, the recap of the season is not shown with "Carry On Wayward Son" by Kansas, but with "Calling" by Soberskin.
Serinda Swan who appears as a hospital receptionist in this episode returns as a evil goddess Veritas in season 6 episode 6; You Can't Handle the Truth (2010).
First episode to feature a "To Be Continued..." at the end.
The town of Blue Earth, MN where Salvation begins is a real town in southern Minnesota nine miles from the Iowa border.