The original continuity revolves around Dr. Sam Loomis. With this order, the story follows Loomis as he pursues Michael, from his initial encounters with Laurie Strode in Halloween & Halloween II, to his involvement with niece, Jamie Lloyd in movies IV to VI.
Michael Myers escaped from the Illinois State Mental Hospital after 15 years of treatment for the brutal murder of his sister and has returned to Haddonfield to relieve his crime. What follows is a reign of terror. He came home for Halloween and may return.
On October 31, 1978, Michael Myers (Halloween) is shot and falls off a balcony. Taking shelter to recover from his injuries, Michael steals a kitchen knife from the home of an elderly couple, and kills a teenage girl living next door. Laurie Strode, who narrowly avoided being killed by Michael earlier in the night, is taken to Haddonfield Memorial Hospital, while Michael's psychiatrist, Samuel Loomis, continues his pursuit of his patient. Accompanied by Sheriff Leigh Brackett, Loomis mistakes teenager Ben Tramer for Michael, when Ben gets hit by a squad car which pins him to another vehicle that bursts into flames, leading to his death. Upon learning his daughter Annie Brackett was killed by Michael, Sheriff Brackett goes off duty to inform his wife, leaving Deputy Gary Hunt in charge to help Loomis.
On October 30, 1988, Michael Myers, who has been in a comatose state for ten years since the explosion at Haddonfield Memorial Hospital, is transferred from the Ridgemont Federal Sanitarium to Smith's Grove Sanitarium by ambulance. En route, Michael wakes from his coma when he learns that his sister Laurie Strode, who died in a car accident, has a daughter, Jamie Lloyd. He attacks the ambulance personnel, and the vehicle crashes. Michael makes his way to Haddonfield in search of his niece. Dr. Sam Loomis goes to Haddonfield after learning that Michael has escaped transfer and gives chase. He arrives at a gas station, where he comes across Michael who has killed a mechanic for his clothes, along with a clerk. Michael escapes in a tow truck and causes an explosion, destroying Loomis's car in the process and disabling the phones by severing the telephone wires. Loomis is then forced to catch a ride to Haddonfield.
On October 31, 1988, Michael Myers is shot and falls down a Shaft mining. Escaping into a nearby creek, he stumbles upon a local hermit and falls into a coma, placing him in the hermit's care, and being nursed back to health by him. One year later, on October 30, 1989, Michael awakens, kills the hermit, and returns to Haddonfield to find his niece Jamie Lloyd again, who narrowly avoided being killed by Michael the year before.
On October 31, 1989, Michael Myers and his niece Jamie Lloyd are abducted from the Haddonfield Police Station. Six years later, on October 30, 1995, Jamie has been impregnated and her infant is born, being taken away by the "Man in Black", the leader of a Druid-like cult. Later, a midwife helps Jamie escape with her baby but is killed by Michael by impaling the back of her skull into a protruding sharp metal spike high on the wall. Jamie and her baby flee in a stolen pick-up truck, with Michael in pursuit. Meanwhile, Dr. Sam Loomis has retired and moved to a hut on the outskirts of Haddonfield, where he lives as a hermit. He is visited by his friend Dr. Terence Wynn, the chief administrator of Smith's Grove Sanitarium, where Michael had been incarcerated as a boy; Wynn asks Loomis to return to Smith's Grove. They overhear Jamie's plea for help on a local radio station, when she makes a call to Loomis, only to be ignored by the radio D.J. Barry Simms. Michael catches up with Jamie, and she crashes the truck into an old barn. He kills Jamie by impaling her on a corn threshing machine and turning it on, disemboweling her, but finds that her baby is not in the truck.