While locked in the bar's cooler, Hieronymus asks Quinn to "use your heat vision" to warm them up. This joke refers to Dean Cain, who plays Quinn, in his most famous role as Superman in the TV series Lois & Clark: The New Adventures of Superman (1993).
Several characters were named for various famous people: Pvt. Connery and Pvt. Lazenby, the two soldiers in the truck transporting one of the infected, were named after Sean Connery and George Lazenby, who both played James Bond ("The best James Bond" was the topic of conversation between the two). Officer Raimi is named for Sam Raimi, director of the "Evil Dead" series of movies. Officer Campbell is named for Bruce Campbell, star of the "Evil Dead" series.
Additionally, the character Armin Shimerman, plays is named Coroner Flutie. Previously, Shimerman had a recurring role on "Buffy the Vampire Slayer" as Principal Snyder. The character he replaced on that show (after he was murdered by students) was Principal Flutie.
First career nude scene for Roxanne Arvizu.