Halloween II (1981) picks up the place the events of Halloween remaining off. Michael (Dick Warlock) follows Laurie to the nearby healthcare facility, killing everyone who arrives among them. The story reveals that Laurie is definitely Michael's sister: she was given up for adoption being an infant. F. Marion Crawford https://youtube.com/shorts/XxJicTFshOk?si=MWe_21sO5t57InfB