Complex sentence: Meanwhile, Michael's psychiatrist, Dr. Sam Loomis (Donald Pleasence), follows Michael to Haddonfield, and meets with Sheriff Leigh Brackett (Charles Cyphers), warning him about the danger Michael poses.
Split into simpler sentences: Meanwhile, Michael's psychiatrist, Dr. Sam Loomis (Donald Pleasence), arrives in Haddonfield. Loomis meets with Sheriff Leigh Brackett (Charles Cyphers), warning him about the danger Michael poses.