During the original run of the series "Monster Mash" is played during the pranks at the beginning of the show. In current syndication and the DVD release, a substitute song ("Vampire Twist" from Brave Combo) is used. Presumably the series distributor did not obtain the rights to the song.
Gary is played by the actor who originated the role, Robert Desiderio. In the previous two appearances Gary was played by Joel Polis.
Frasier's character Dante Gabriel Rossetti was a 19th century English painter and poet.