“That ’70s Show” FOX 7:30 p.m.

Let the Halloween specials begin. The gang enjoys a horror movie and visits a haunted school in this festive episode.

“Y2K: The Winter of Our Disconnect” PBS 7 p.m.

Still confused about that whole Y2K thing? This show will explain where the problem originated and some of the repercussions of the phenomenon.

Prime Time Listings

ABC: 7 p.m. “Spin City,” 7:30 p.m. “It’s like, you know …,” 8 p.m. “Dharma & Greg,” 8:30 p.m. “Sports Night,” 9 p.m. “Once and Again.”

CBS: 7 p.m. “JAG,” 8 p.m. “60 Minutes II,” 9 p.m. “48 Hours.”

FOX: 7 p.m. “Ally,” 7:30 p.m. “That ’70s Show,” 8 p.m. “Party of Five,” 9 p.m. “Judge Judy,” 9:30 p.m. “Judge Judy.”

NBC: 7 p.m. “World Series, Game 3: Atlanta Braves at New York Yankees.”