Halloween is an American horror franchise that consists of nine slasher films, novels, an comic books. The franchise focuses on the fictional character of Michael Myers who was committed to Smith's Grove Sanitarium as a child for the murder of his older sister. Fifteen years later, he escapes to stalk and kill the people of Haddonfield, Illinois while being chased by his former psychiatrist Dr. Sam Loomis. Michael's killings occur on the holiday of Halloween, on which all of the films primarily take place.