who were the actors involved?
Bill Murray, Dan Aykroyd, Sigourney Weaver, Harold Ramis, Rick Moranis, Ernie Hudson, and Annie Potts.
Ghostbusters II
 It stars Bill Murray, Dan Aykroyd, Sigourney Weaver, Harold Ramis, Rick Moranis, Ernie Hudson, and Annie Potts. 
what is ghostbusters ii? It is a 1989 American supernatural comedy film.
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Ghostbusters II [SEP] Introduction
GhostbustersII is a 1989 American supernatural comedy film directed by Ivan Reitman and written by Dan Aykroyd and Harold Ramis. It stars Bill Murray, Dan Aykroyd, Sigourney Weaver, Harold Ramis, Rick Moranis, Ernie Hudson, and Annie Potts. It is the sequel to the 1984 film "Ghostbusters" and the second film in the "Ghostbusters" franchise. Set five years after the events of the first film, the Ghostbusters have been sued and put out of business after the destruction caused during their battle with the demi-god Gozer. When a new paranormal threat emerges, the Ghostbusters re-form to combat it and save the world.