Poltergeist is an American horror film series distributed by Metro-Goldwyn-Mayer during the 1980s. The original trilogy revolves around the members of the Freeling family, who are stalked and terrorized by a group of ghosts lead by a demon known as the Beast that are attracted to the youngest daughter, Carol Anne. The original film was co-written and produced by Steven Spielberg. The Poltergeist films collected a total of approximately $132 million at the United States box office.

Poltergeist is the original film in the trilogy, directed by Tobe Hooper and co-written by Steven Spielberg and released on June 4, 1982. The story focuses on the Freeling family, which consists of Steven (Craig T. Nelson); Diane (JoBeth Williams); Dana (Dominique Dunne); Robbie (Oliver Robins) and Carol Anne (Heather O'Rourke), who live in a California housing development called Cuesta Verde, which comes to be haunted by ghosts.

Poltergeist II: The Other Side is a 1986 American supernatural horror film and the second entry in the Poltergeist film series. A sequel to Poltergeist, it features the return of the original family, who are once again confronted by a spirit trying to harm their daughter, Carol Anne.

Poltergeist III is a 1988 American supernatural horror film and is the third and final entry in the original Poltergeist film series. Writers Michael Grais and Mark Victor, who wrote the screenplay for the first two films, did not return for this second sequel.

More Info: en.wikipedia.org