- Directors: John Carpenter
- Producers: Debra Hill, John Carpenter, Kool Lusby, Irwin Yablans, Moustapha Akkad
- Writers: John Carpenter, Debra Hill
- Genres: Horror, Thriller
- Actors: Donald Pleasence, Jamie Lee Curtis, Nancy Loomis, P J Soles
On Halloween night 1963, six-year-old Michael Myers (Will Sandin) murders his fifteen-year-old sister Judith (Sandy Johnson) with a large kitchen knife at their home in Haddonfield, Illinois. Almost immediately after, his mother and father arrive home and find him in a trance-like state. They send him to Smith’s Grove – Warren County Sanitarium and he is placed under the care of child psychiatrist Dr. Sam Loomis (Donald Pleasence).
Eight years of treatment lead Loomis to suspect that Michael is nothing less than pure evil. Seven years of trying to keep Myers locked up ends upon his attempted transfer to be prosecuted as an adult. Myers (now 21 years old) escapes from Smith’s Grove, steals the institution’s car, kills a truck driver for his jump suit, and returns to Haddonfield.
Loomis knows where he is going and pursues him. In Haddonfield, Myers stalks teenager Laurie Strode (Jamie Lee Curtis) and some of her friends. At various points throughout the day Laurie sees a man in a white mask (from her classroom window, behind a bush while she walks home, and in the clothesline from her bedroom window).
Later in the evening, Laurie meets her friend Annie Brackett (Nancy Loomis) who is babysitting Lindsey Wallace (Kyle Richards) across the street from where Laurie is babysitting Tommy Doyle (Brian Andrews). After arranging to pick up her boyfriend, Annie sends Lindsey to stay with Laurie at the Doyle house before being murdered by Myers. Tommy sees Myers carrying Annie’s body into the Wallace house and thinks he is the Boogeyman. Laurie dismisses the boy’s terror and sends Tommy and Lindsey to bed. Myers later murders another friend of Laurie’s, Lynda Van Der Klok (P. J. Soles) and Lynda’s boyfriend, Robert “Bob” Simms (John Michael Graham) after they have sex in the empty Wallace house.
Laurie worries for her friends’ safety after receiving a strange phone call from Lynda at the Wallace house. She walks across the street and discovers the three bodies plus Judith Myers’ missing tombstone. She is attacked by Michael Myers but escapes back to the Doyle house. Laurie stabs Myers in the neck with a knitting needle, and in the eye with a clothes hanger, and in the torso with a knife, but he continues to pursue her. Eventually Laurie tells Tommy and Lindsey to go to the Makenzie’s house to call the police than Loomis spots Tommy and Lindsey running from the house and finds Myers in the upstairs hallway. Loomis rescues Laurie from being strangled by Myers, shooting him six times and causing him to fall from the house’s second-story balcony. Upon looking out the window for Myers’ body, however, Loomis discovers that he is nowhere to be found, and the film ends with shots of the Doyle, Wallace, and Myers houses accompanied by heavy breathing.