This episode was directed by Dan Butler who plays Bob "Bulldog" Briscoe in the series.
One of the title cards reads "Don Juan in Hell". This is the title of a play within a play in George Bernard Shaw's "Man and Superman" (1903) as well as the title of a short poem (originally in French) by Baudelaire published in the collection "Flowers of Evil" in 1857.
It is learned that Frasier's program on KACL airs from 2 p.m. to 5 p.m.
Caitlin's apartment is Apartment C. The letter might represent a crescent moon as a symbol of Selene, the moon goddess that Caitlin worships.