As a six year old boy, he murders his older sister Judith. Michael is then locked up in Smith's Grove Sanitarium. For the next fifteen years, Michael rots in Smith's Grove, isolating and withdrawing himself as his psychiatrist, Dr. Loomis, tries to study and understand the boy.
One night, Michael escapes the sanitarium and returns to his home town of Haddonfield, Il. There he stalks teenagers on Halloween night, including a female babysitter named Laurie Strode. It becomes known later that Laurie is his baby sister who has gone through the adoption process and now has a whole new family.
The first film ends with a climatic ending, Michael is about to attack Laurie, when Dr. Loomis interferes. Dr. Loomis shoots Michael several times launching him
out of a second story window and onto the front lawn. When Loomis goes outside to examine the body, Michael is gone.
The second film picks up from here, and the police arrive and take Laurie to the hospital for her injuries, while Loomis searches the streets for Michael. Michael follows Laurie to the local hospital and terrorizes the staff on his quest to kill Laurie. Loomis learns of Lauries connection to Michael and heads to the hospital to save her. Loomis and Michael are blown up in the hospital during a gun fight hitting an oxygen tank. Laurie and her new ambulance driver boyfriend survive.
In Part 4: The Return of Michael Myers, it is ten years later (Disregarding a 3rd Halloween movie...which had nothing to do with Michael or the series), we learn that Michael and Loomis both survived the explosion and Michael is in a coma in a federal sanitarium.
In a brief history lesson, we learn that Laurie was killed in a car accident, but her daughter, Jamie survived. Hearing the news, Michael snaps out of his coma, escapes and once again heads home to Haddonfield, this time he goes after Jamie. Dr. Loomis arrives and finds Jamie, placing her into police custody as the town is terrorized by Michael.
With the help of some town folk, Jamie and her foster sister, Rachel, escape town via truck. Hidden on the back of the pick up truck is Michael, who dispatches some town folk in his path to get to Jamie. The truck crashes in the woods, but luckily for Jamie and Rachel, the state police are hot on the trail. The police eventually catch up and open fire on Michael, shooting him to bits as he falls down a mineshaft. The police blow up the mineshaft killing Michael.
And so we thought. This is where Part 5: The Revenge of Michael Myers picks up. In a more detailed flashback to the end of Part 4, we learn that Michael slips out of the mine shaft by crawling out a hole which leads to a nearby river. Michael falls into the river and washes up down stream all beat up. A friendly hobo, drags Michael out of the river and nurses him back to health over the next year.
Halloween night the following year, Michael once again returns to Haddonfield. Jamie has been put in a kids home, and Michael attempts to get to her again. Dr. Loomis and the police eventually capture Michael and lock him up at the police station. A mysterious shadowy figure busts Michael out of jail, and the two disappear into the night.
Onto Part 6: The Curse of Michael Myers...six years later a secret cult named The Cult of Thorn has captured Jamie and has impregnated her with the hopes of controlling Michael with her baby. As she delivers her baby, one of the cult members helps her escape, as Michael shows up at the cult's headquarters causing a ruckus. Jamie escapes with her baby, but Michael is hot on her trail. Jamie is killed by Michael, but not before hiding her baby.
Tommy Doyle (one of the babysitting kids from the first film), finds the baby and with the help of Dr. Loomis and Kara Strode (cousin of Laurie), they attempt to keep the baby from Michael and the Cult of Thorn. A bizarre ending leaves the baby in the hands of the cult, with Michael at their compound trying to kill it. Tommy, Kara and the baby escape as Dr. Loomis i
s seen going back into the place to settle some unfinished business. He screams and the movie ends.
Moving on the H20, the film disregards anything that has happened in Parts 4,5, and 6 and moves on to the story line of Laurie living peacefully in California with her son at a boarding school. Michael discovers that Laurie still lives and takes a road trip to the boarding school. While most of the private schools students are out on a weekend trip, Michael terrorizes the skeleton staff and students left in his efforts to get to Laurie and her son. They fight back and kill Michael by chopping off his head. End of Michael Myers.
Not! Halloween: Resurrection (Part 8) picks up with an alternate look at the end of H20. We learn that Michael had crushed some police officer's throat and swapped clothing with him. When Laurie chops off the head, it is actually the switched body of the police officer. A year later, Michael tracks Laurie to a mental institute where he eventually kills her. Michael then takes off home to Haddonfield where he discovers a television show using his house as part of a Halloween reality show. Michael kills the contestants of the show before dying in an electrical fire. And that's how Michael finally dies. Or does he?
Michael's legend is born again and a little bit more detailed in Rob
Zombie's remake. In Zombie's vision of Michael we learn that he has a troubled youth. Michael loves to kill animals, and is fascinated with wearing masks. His mom is a stripper who dates an abusive boyfriend.
Judith, his sister, is a mean slut who fails to take him Trick or Treating on Halloween. Michael breaks down and kills her, mom's boyfriend and a few others on Halloween night. Michael gets locked up at Smith's Grove and he mentally deteriorates over the next 16 years.
Michael stops talking and continues his obsession with making masks and then breaks out and goes after his baby sister, Laurie repeating similiar events to the first wave of Halloween films.
