R | | Horror, Thriller
Fifteen years after murdering his sister on Halloween night 1963, Michael Myers escapes from a mental hospital and returns to the small town of Haddonfield, Illinois to kill again.
While filming, there was a number given to Curtis as to Laurie's "terror level" during any given scene, indicating to the actress where her character is mentally, since Halloween was shot out of order. She also mentions Carpenter allowed her to make the character vulnerable by explaining to her it wasn't a character weakness but a way to allow the audience in to where Laurie was mentally.
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When Laurie walks to the Myers house to drop off the key, she only has a few blocks to walk. However, when she and Annie drive clear across town to reach the Doyle house, the Myers house is conveniently close by.
The music for the film -- written and performed by John Carpenter -- is instead credited to "The Bowling Green Philharmonic Orchestra." Carpenter grew up in Bowling Green, Kentucky.
For the 20th Anniversary restoration in 1998, new sounds were added to the film's audio track under John Carpenter's approval. New thunder sounds were added to the Loomis car scene. Wind sounds were added as well. The 1999 DVD release contains both the original unaltered mono sound and a Dolby Digital 5.1 option with the added sound effects.