Slimer's frequency is revealed to be 500,000 Megahertz.
The Ringmaster ghost, also known as 'Mr. Ugly', is identified as 'Ghash' in the screenplay. This spook makes a cameo appearance in Xmas Marks the Spot (1986) and also appears in the opening credits for every episode of Extreme Ghostbusters (1997).
This is one of seven episodes from the early seasons to be re-dubbed with Dave Coulier and Kath Soucie. It was rebroadcast as part of season four.
The voice actors were recorded on June 10, 1986.
During the surprise party, it is revealed Winston's favorite flavor is Blueberry Fudge Cake.