Second time Penny Parker appears on the show.
Second time for actor Elya Baskin in the show, this time in a different role, first time was on a first season episode A Prisoner of Conscience (1986).
The scene when Vincent Schiavelli's character protests that he has been given a corned beef sandwich with mustard only to be told to wipe it off, is an in joke with producer Henry Winkler. In the movie Night Shift, Vincent Schiavelli plays a food delivery man who delivers food to Henry Winkler who also protests the presence of mustard on his sandwich. Schiavelli also tells Winkler to wipe it off.
The "torture" device used by the Vincent Schiavelli's character was in fact an EMS VCS3 synthesizer.