There are some key things that happen in the middle of the film, but unfortunately, there are no good photos. You'll just have to settle for this picture of Laurie looking out her window while I explain what goes down next.
Loomis has a hunch that Michael will return to his old home in Haddonfield. On his pursuit to track Michael down, he discovers a mechanic's truck along the side of the road. Michael's clothes are near the truck, implying that he has stolen the man's jumpsuit. This alarms Loomis and he hurries along on his journey to Haddonfield, while the camera pans and we see that Michael has already claimed his first victim of the night: the mechanic. Spooky!
Upon arriving at the town, Loomis enlists the help of Sheriff Leigh Brackett (aka Annie's dad) once he's discovered that the headstone of Janet Myers has gone missing. Michael burgles a local hardware store and steals rope, knives, and a mask — totally normal stuff. Loomis and the sheriff visit Michael's old house together, and Loomis stays there to stand guard.