Halloween II (1981) picks up in which the situations of Halloween still left off. Michael (Dick Warlock) follows Laurie into the nearby healthcare facility, killing Absolutely everyone who comes involving them. The story reveals that Laurie is in fact Michael's sister: she was provided up for adoption being an infant. https://youtube.com/shorts/XxJicTFshOk?si=MWe_21sO5t57InfB