Dewey LaMort the Western novelist is a clear reference to Louis L'Amour, perhaps the most well known and prolific Western writer.
In an earlier draft of the script, LaMort's limo was blown up by Wyatt.
Also in the earlier draft of the script, it is shown the Ghostbusters got their rental car from Fred Mertz, of Mertz Rent-A-Car.
The voice actors were recorded on November 21, 1986.
This episode is one of the few in which Slimer operates a proton pack.