The character of John Curtis (Mark Hamill), has his date of birth listed as September 25, 1951. This is Hamill's actual birthday.
Joe Mantegna and Mark Hamill are two of only three actors to play both themselves and a fictional character on The Simpsons (1989). Coincidentally, they both appear in Mayored to the Mob (1998).
The funeral scene was shot in the Angeles Rosedale Cemetary in Los Angeles, based on several notable headstones featured in the background. This location was also frequently used in Buffy the Vampire Slayer on which Nicholas Brendan was a main character.
There were several references of the number 8 in this episode. Coincidentally, this was the 8th season of the series. And, also coincidentally, when written horizontally, this is the symbol of infinite number.