The film begins with six-year-old Michael (Will Sandin) killing his older sister Judith (Sandy Johnson) on Halloween night 1963 in the fictional town of Haddonfield, Illinois.

Fifteen years later, Michael (Nick Castle) escapes from Smith's Grove and returns to his hometown while being pursued by his psychiatrist, Dr. Sam Loomis (Donald Pleasence).

The pair discover that Silver Shamrock Novelties, a company run by Conal Cochran (Dan O'Herlihy), is attempting to use the mystic powers of the Stonehenge rocks to resurrect the ancient witchcraft of the Celtic festival, Samhain.

While being transferred back to Smith's Grove, Michael awakens upon hearing that Laurie Strode died in a car accident and leaving behind a daughter, Jamie Lloyd (Danielle Harris).

Michael kills Jamie and continues searching for her baby; the infant is found and brought to safety by Tommy Doyle (Paul Rudd), the young boy who was babysat by Laurie Strode in the first film.

The mysterious stranger is revealed to be Dr. Loomis's colleague, Dr. Terrence Wynn (Mitchell Ryan), who is part of a cult who protect the chosen individual so that they may complete their task.

[14] Halloween: Resurrection picks up three years after H20 and reveals that Michael escaped after swapping clothes with a paramedic, crushing the man's larynx so that he could not talk, and that was whom Laurie killed.

He kills Laurie and travels back to his family home in Haddonfield but finds a group of college students filming an Internet reality show.

Michael murders the cast and crew until he is electrocuted by the only surviving student, Sara Moyer (Bianca Kajlich), and the show's creator Freddie Harris (Busta Rhymes).

Fifteen years later, Michael (Tyler Mane) escapes and heads to Haddonfield to find his sister, with his psychiatrist Dr. Sam Loomis (Malcolm McDowell) in pursuit.

[21] Halloween Ends (2022) picks up four years after Kills and sees Laurie reeling from the events of Michael's rampage by moving into a new home with Allyson and writing a memoir.

Allyson returns to assist her grandmother, and Laurie gets the upper hand before cutting Michael's throat and slicing his wrist, and he finally dies from extreme blood loss.

[25] The low budget forced wardrobe and props to be crafted from items on hand or that could be purchased inexpensively, this included the trademark mask worn by Michael Myers throughout the film.

Familiar Foods, a milk bottling plant in Loleta, served as the Silver Shamrock Novelties factory, but all special effects involving fire, smoke, and explosions were filmed at Post Studios.

[33] Zombie also wanted to reinvent the character, as he felt Michael, along with Freddy Krueger, Jason Voorhees, and Pinhead, had become too familiar to audiences, and as a result, less scary.

[37] In an interview, Zombie expressed how the exhaustion of creating the first Halloween made him not want to come back for a sequel, but after a year of cooling down he was more open to the idea.

"[25] In the end credits, Carpenter bills himself as the "Bowling Green Orchestra" for performing the film's score, but he did receive assistance from composer Dan Wyman, a music professor at San Jose State University.

[23][59] The score for Halloween II is a variation of John Carpenter's compositions from the first film, particularly the main theme's familiar piano melody played.

Written by Curtis Richards, the book follows the events of the film, but expands on the festival of Samhain and Michael's time at Smith's Grove Sanitarium.

[138] The first, released on October 1, 1997, titled The Scream Factory, follows a group of friends who set up a haunted house attraction in the basement of Haddonfield City Hall, only to be stalked and killed by Michael Myers while they are there.

The Mad House features a young girl, Christine Ray, who joins a documentary film crew that travels to haunted locations, and they are headed to Smith's Grove Sanitarium, where they are confronted by Michael.

[144] One Good Scare came about because Hutchinson wanted to produce a comic book to celebrate the series' twenty-fifth anniversary, to be sold as a collectible at a Halloween convention in South Pasadena.

Malek Akkad was approached by Devil's Due Publishing with the possibility of producing a line of Halloween comics, and he and Hutchinson worked to make them a reality.

He wanted to avoid the "bloodline plot of the middle sequels", which he felt demystified the character of the Shape, and approach the story so that "it becomes almost incidental that she's his sister".

Hutchinson believed that Laurie Strode's evolution into Keri Tate was fertile ground for a storyline; he says, "it's not the faking of the death that's interesting at all, but it's the fall that leads to that happening.

The faked death is just simple mechanics and can be covered in a sentence, but the state of mind and events leading to that are full of rich character and dramatic potential.

Hutchinson comments that, while the retcon was unpopular with "a lot of fans" for ignoring previous movies, he preferred the "simplicity of this storyline, over the needlessly convoluted mythology that the last three films had created".

[145] Written by Hutchinson and featuring illustrations from Autopsis' Marcus Smith, Sam is a prose short story available exclusively for download at the website HalloweenComics.com.

[158] Halloween has also seen profitability through various merchandise like toys, dolls, statues, model kits, bobbleheads, snow globes, movie posters, masks, T-shirts, hats, and more.

[163] Many versions of the original Halloween as well as several of its sequels have been released on DVD and Blu-ray by Anchor Bay Entertainment, Universal Pictures and Dimension Films.