# The logo used in the movie is unique. Unlike the logo that appears in marketing materials, it is the original, lost design: the ghost has two legs stepping through the red symbol. After it was designed for the movie title intro, the design was lost, so it had to be redone. However, when it was redrawn they forgot to add in the second leg! So it appears the ghost has only one leg, or a funny-looking tail. You can tell it's meant to be a leg, as there is an indication of a foot and an ankle.
# There are no opening titles. The movie's title is represented by an animation of the movie's logo.
# The Ghostbusters phone number, as seen in the film, is (212) 555-2020.
# The Ghostbusters address and phone number, as seen on a prop invoice (used in Janine's office), is:
110 N. Moore St.
New York, NY 10012
# Although not stated in the film, the Scoleri Borthers are Nunzio Scoleri (the fat one) and Tony Scoleri (the skinny one).
# The newspaper headlines seen in the "Ghost Fever Grips New York" montage from "Ghostbusters" (1984) are visible on the walls of Peter's apartment.
# The kid who says to Ray, "My Dad says you're full of crap" is Ivan Reitman's son Jason. Isn't it an interesting line for him to say?
# The girl Egon was conducting the affection test on is Ivan Reitman's daughter, Catherine.
# Venkman's female guest on "World of the Psychic" is played by an unbilled Chloe Webb, who had previously starred in Ivan Reitman's "Twins" (1988).
# Venkman's male guest on "World of the Psychic" is played by an unbilled Kevin Dunn.
# Bobby Brown, who sings the movie's theme song "On Our Own," appears as the mayor's doorman. He's credited as Bobby Baresford Brown.
# Eugene Levy was originally in the film as Sherman Tully, Louis' cousin. Louis went to him for help in getting the Ghostbusters out of the psychiatric ward. His scenes were cut, and there are no Deleted Scenes on any DVD edition of the film.
# Hanging on the walls of the television studio office where Peter films World of the Psychic are photos from real television series. The only two that can be made out clearly are Nakia (1974) and Top Cat (1961). These can be seen in the widescreen version on the left of the frame as Peter walks out just after doing his show.
# During the "Flip City" montage, there is a theater marquee advertising Cannibal Girls starring Eugene Levy and Andrea Martin. This early 1973 film, was also directed by Ivan Reitman.
# In the entranceway of that same movie theater, behind all of the panicking people, one can glimpse the movie poster for the 1975 film They Came from Within (aka Shivers).
# Egon looks up some information about Vigo in the computer. Among the information is Vigo's full name: "Vigo Von Homburg Deutschendorf." The actor who played Vigo was Wilhelm Von Homburg, and baby Oscar was played by William & Henry Deutschendorf.
# Valery Pappas, who voiced the Ghost Bride in "EGB: Till Death Do Us Start," is the woman arguing with her husband in Egon's lab.
# The shots that appear under the end credits were deleted from the film itself.
# At the end of the version shown in theaters, Slimer comes out from behind the Statue of Liberty and goes right into the camera (as he did at the end of Ghostbusters). The video version just ends with a pan up to the statue's head then a fade to black.
# Also deleted from the video version, is the scene of Louis Tully and Slimer fighting in the firehouse. Louis had put a small mirror on his glasses so he could see behind him. This way, Slimer wouldn't sneak up on him. The end credits shot of Simer was taken from this scene.