This may be the one film on this list that you will argue doesn't deserve to be here as it is the lone HALLOWEEN movie not connected to the Michael Myers saga. Well, the original vision was to make the series an anthology which each new chapter focused on a new holiday-themed tale. While we never got those other stories, SEASON OF THE WITCH treats the original movies as fictional films within this universe. With a story influenced by Celtic myth and witchcraft, we have the lasting chills from those rotten masks and the Silver Shamrock jingle. If you find you always skip this movie when watching the HALLOWEEN series, you owe it to yourself as this is one of the most underrated horror films of the 1980s.
Source : http://www.joblo.com/movie-news/lists-top-10-movies-in-the-halloween-franchise-ranked-best-to-worst-165