Myers made his first appearance in the 1978 film Halloween. At the beginning of Halloween, a six-year-old Michael murders his teenage sister Judith on Halloween night in 1963. Fifteen years later, he escapes Smith's Grove Sanitarium and returns to his hometown of Haddonfield, Illinois, where he stalks a teenage babysitter named Laurie Strode, while his psychiatrist, Dr. Sam Loomis, attempts to track him down. After murdering three of Laurie's friends, Michael attacks her as well. She fends him off long enough for Loomis to arrive and shoot Michael six times, knocking him off a balcony; when Loomis goes to check the body, he finds that Michael has disappeared. Halloween II (1981) picks up directly where the original ended. Michael follows Laurie to the local hospital and kills the staff one by one. Loomis discovers that Laurie is Michael's younger sister and rushes to the hospital to find them. Laurie shoots Michael in the eyes, and Loomis blows up the operating theater while Laurie escapes. Michael emerges from the explosion, engulfed in flames, before finally collapsing dead
Michael does not appear again until Halloween 4: The Return of Michael Myers in 1988, which picks up ten years after the events of Halloween II. In this canon, known as the “Thorn Timeline”, Michael survived the explosion, leaving him in a coma. He awakens when he learns Laurie has died in a car accident but has a nine-year-old daughter, Jamie Lloyd. Returning to Haddonfield, he causes a citywide blackout and massacres the town's police force and some civilians before being shot by the state police and falling down a mine shaft. Halloween 5: The Revenge of Michael Myers begins immediately after the fourth film ends, with Michael escaping the mine shaft and being nursed back to health by a local hermit. One year later, he kills the hermit and returns to Haddonfield to find Jamie again, chasing her through his childhood home in a trap set by Loomis. He is eventually subdued by Loomis and taken to the local police station, but a mysterious "Man in Black" kills the officers and frees him
