First appearance and speaking role of Dr Marvin Monroe in many years. The actor portraying him says the voice is physically painful to perform and they scratched the character early on in the series.
This episode features a guest voice by Thomas Pynchon, the legendarily reclusive author of such novels as "V" and "Gravity's Rainbow." Prior to that, Pynchon had never granted an interview, or even allowed himself to be photographed, so the appearance was quite literally the first time his voice had been heard publicly. He also did a voice for the 16th season episode "All's Fair in Oven War".
When Homer is ordering at the Krusty Burger drive-through the total of the menu items add up to $33.47. However, at the bottom of the menu they offer 'all of the above for $39.95'. Mistakenly thought of as a goof though Homer may have ordered some extra items.