This comedic farce came out of nowhere using special effects to combine a world of ghosts, biblical demons, spirits, "autonomous free-form vaporous apparitions", all sorts of nasty stuff from "Tobin's Spirit Guide", especially world destroyer Gozar, who may be gaining entrance through hot cellist Sigourney Weavers apartment. When Bill Murray and Dan Akroyd get fired from a university psychic research job, they form a team of scientific ghost exorcists, and take off with a popular tv ad, "Who ya gonna call?", and investigate all the psychic activity in New York. A howlfest if you don't take it too seriously, and who could, with dialogue like this?:

Harold Ramis: I'm into molds, spores, and fungi...

Rick Moranis is terrific as a nerdy neighbor accountant who becomes "The Keymaster", Annie Potts as the Ghostbuster's receptionist, Harold Ramis (who co-wrote) as a GB founder.

Quote: I've worked in the private sector, they expect results. (Akroyd)