One of the non-speaking characters, the one on his own left sitting on the couch, drops a newspaper when the gun goes off. The newspaper's headline: "I Let Go of the Bumper and the Bus Ran Over Me." Amazing what you can do with a high-def TV.
Second factoid, the actress playing Arlene Schabel (upstairs love interest), has her name spelled Linda Hutchins in the credits. She is otherwise known as Linda Hutchings.
Several members of this episode's staff, the blonde actress (mentioned in other reviews) the production manager Lindsley Parsons, production associate John Erman, makeup supervisor Fred Phillips, art department Richard Rubin, assistant director Robert Justman, went on to work on Star Trek projects.
Special effects Ray Mercer went on to work on Star Wars.