The classic black and white movie being watched is Night of the Living Dead (1968), which is often used in movies and TV shows because it is in the public domain due to a copyright issue and thus free.
Carl Alacchi who played Mr. Braun in this episode would later reappear in the series again in the episode "The Tale of the Full Moon" portraying the werewolf.
Mark Camacho, who played The Delivery Man. Later reappeared in the Season 2 episode "The Tale of the Shiny Red Bicycle" as Mr. Buckley.
Johni Keyworth, who played the Mail man Mr. Mitchell in this episode also later reappeared in the episode "The Tale of the Thirteenth Floor" as Gus.
One of twenty-one episodes where the Midnight Society didn't leave and douse the fire with the water-bucket (they used the cider they'd been drinking).