When Lindsay is watching TV alone, the movie she is watching is The Thing From Another World (1951). A few years later, John Carpenter, who directed Halloween, would film a remake entitled The Thing (1982). See more...
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Plot hole: When Laurie and Annie are driving and run into the sheriff, he says there was a break-in and a knife, rope, and mask were stolen, indicating it was Micheal. But the alarm was still going off at around 3pm (it's after school). Micheal had the mask already in the morning (as you can see when he's watching Laurie when she drops the keys off). Why would it take 6+ hours to turn the alarm off?