An episode where a little girl is caught in the wall is pulled out of a mystical zone is the worse rip off I have ever seen. So I put into google the query did spielberg rip off poltergeist from an episode of the twilight zone, and this is what popped up:
http://www.cracked.com/article_20439_7-classic-movies-that-are-shameless-ripoffs_p2.html
http://www.cracked.com/article_20439_7-classic-movies-that-are-shameless-ripoffs_p2.html