Most of the zombies in Gus' first dream are made up of the show's directors, producers, writers and other staff. The first zombie you see that seems to be leading the group is the show's creator Steve Franks.
Guest star Bruce Campbell's character is named Dr. Ashford N. Simpson. This is both an obvious reference to Ashford & Simpson - the husband and wife singing-songwriting duo of the 1960s and 70s - and a nod to Campbell's character Ash from the The Evil Dead (1981) franchise.
Because several shots were finalized for this episode after filming of the final episode, several of the regular and recurring cast members final scenes were filmed in this episode.
Pineapple Sighting: on the kitchen counter in the "Texas Chainsaw Massacre"-esque home.
The last line of the episode is, "Hail to the King, baby!" This is from the Evil Dead franchise, starring Bruce Campbell.