By far the funniest sci-fi movie I have ever seen. In this sci-fi classic, three parapsychology are kicked out of a University and then start their own business catching Ghosts. Because of their lack of funding they buy a broken down building and old car(Ecto1). After a few days of being open they almost go out of business.

But, then a proposition comes up after a orchestra cello player gets scared out of her appartment in a large high rise building. A few Ghostbusters investigate and find nothing, a few weeks pass and then the orechestra cello player experiences another ghost. This time her body gets taken over and door to another dimension is about to be open. The only people who can save her are the Ghostbusters. So the question remains, "Who are you going to call?"