During season 9, Emily Procter (Calleigh Duquesne) is pregnant. However, in the show they chose to hide it. If you watch closely you will notice during this episode when Calleigh is walking from behind the counter to the seats with Lucy (Johanna Braddy), they use a stunt double. This trick occurs throughout season 9.
The victim's derby name is "Wrath of Connie", number 11. The number is shown in a sans serif font. Someone on the writing staff is apparently a Trekkie as this is an obvious reference to Star Trek II: The Wrath of Khan (1982) ("Wrath of Khan" and "Star Trek II")
Jersey numbers of the skaters include "420", "666", and "B52".