Continuity mistake: After the library scene, while the three scientists are walking and talking, a woman in a striped blue and yellow sweater passes by Egon, but disappears in the immediate next angle. (00:21:35)
Continuity mistake: At about the middle of the film, when the Ghostbusters are rising to fame and are appearing on the front of newspapers and magazines, the photograph on the front of the New York Post is taken from the end of the film, just before the four of them cross the streams from their proton packs. (00:39:37)
Continuity mistake: During the flying eggs scene, the lettuce on the right changes shape and position between angles. (00:19:20)
Continuity mistake: The Stay Puft Marshmallow Man has a red bow tie on as he walks down the streets of New York, which disappears in one shot as the Ghostbusters fire at him. (01:30:45 - 01:32:05)
Continuity mistake: When the eggs pop out of her bag and start cooking on the counter, they're in different positions depending on whether it's a close up or wide shot. (00:18:55)
Continuity mistake: When Winston gets hired, Venkman and Stantz have just come back from a job. They're covered in slime and Venkman's smoking. Ray gives Winston an armful of traps. We then cut to Venkman chatting to Dana after a rehearsal, so we assume it's later, maybe even a different day. After that scene though, we then cut back to Stantz showing Winston (wearing the same shirt) what to do with the traps, and Venkman talking to the guy from the EPA. Venkman's got the same slime pattern on his shoulder, and is still smoking. Looks like the Dana/Venkman scene was in the wrong place. (00:42:00)
Continuity mistake: In the scene when the Ghostbusters have a police escort, as they arrive at the condo building, in the wider angle of the police convoy with Ecto-1 approaching the building, the lights appear to be off, only to be on again in the next shot.
Continuity mistake: When the terror dog ruins Louis' house party, a man cowers behind a dining chair. In the shot immediately following his closeup, the chair has magically sprouted armrests. (00:59:35)
Continuity mistake: When Venkman is going into Dana's apartment for the first time, he plays a few notes on the piano. He does not fully open the piano key cover (just enough to play the notes). The next shot (or a few later) you can see the piano key cover completely off. (00:24:25)
Continuity mistake: In the scene when they are emerging after the Stay-Puft explosion, we see Ray with marshmallow on his face and a small amount on his chest. He wipes his face, but in the shot following his apology for the burnt dog hair comment, his front side is completely covered in the stuff. (01:35:50)
Continuity mistake: When the heros arrive at Dana's building, they're saluted by a crowd. If you pay close attention, you'll see the same extra in two different positions (he's the young - and very "happy" - guy wearing a grey suit and a purple tie). (01:19:30)
Continuity mistake: When the hotel manager refuses to pay the bill after the Ghostbusters capture the green ghost (Slimer), you can see he is putting his handkerchief into his top pocket with his left hand, but in the very next shot he can be seen putting the handkerchief in the pocket with both hands. (00:38:50)
Continuity mistake: As the earthquake happens and the ghostbusters fall in the crack, the close-up shot shows Ray holding his gloves, yet in the immediate cut away he is wearing them. (01:20:30)
Continuity mistake: When Dana returns to her apartment (the first time we see her do so) she is carrying a bag of groceries. The contents at the top of the grocery bag change with each shot: one time celery, then bread, then eggs, etc. (00:17:00)
Continuity mistake: The large blue book that Peter drops on the table to startle Egon disappears off the table in the next shot. (00:07:10)
Continuity mistake: When the demon breaks out of the statue on Dana's apartment building, it breaks away the right paw. When we see the statue after the demon is out, both paws are intact. (00:48:55 - 00:51:55)
Continuity mistake: At the hotel, when the Ghostbusters blast the cleaning lady's trolley, the stuff on the floor changes between shots. Watch the toilet paper on the far left, for example. (00:31:50)
Continuity mistake: When the mayor orders Walter Peck out of his office, you can see that he is pointing his finger at Peck, but when the camera angle changes his hand is nowhere to be seen. (01:17:45)
Continuity mistake: When we see Dana for the first time, there is an aerial shot of her taxi pulling over to drop her off. The front end of the taxi drives into the view of a tree, however when Dana gets out of the cab, the tree has vanished and there is a clear view. (00:16:50)
Continuity mistake: In the scene where the earthquake begins, the Ghostbusters fall into a hole. They're in two rows - in the first row are Venkman and Ray and in the second row are Egon and Winston. In the following shot, it is now Ray and Winston on the first row and Venkman and Egon on the back row. (01:20:30)
Answer: Chevy Chase, John Candy, Danny DeVito, Peter Falk, Mellisa Gilbert, Carly Simon, Teri Gar, and George Wendt, along with the four major stars of Ghostbusters themselves.