On October 25, 1978, one of the most successful independent films of all time opened with little fanfare on a single screen in Kansas City, Missouri. John Carpenter's Halloween launched the 1980s slasher-film craze and (spoiler alert) defined the "final girl" trope as soon as star Jamie Lee Curtis survives to tell the tale of how everybody she knew was hacked and slashed by masked serial killer Michael Myers. Now a classic, Halloween gets a nationwide screening tonight at 7:30 p.m., with a brand-new introduction by John Carpenter. You can see it locally at the Wehrenberg Des Peres 14 Cine (12701 Manchester Road, Des Peres; 314-822-4903 or www.fathomevents.com). Tickets are $15.