By LUAINE LEE Scripps Howard News Service December 10, 2002 NEW YORK - Don't ask Brent Spiner, the lovable yellow-eyed Data from "Star Trek: The Next Generation," what happened in Episode 17. Or 42. Or 135, for that matter. Spiner doesn't watch the show much, even though he starred on it for seven years and is back again, squeezed into his Spandex leotards and pancake-batter makeup for the new feature, "Star Trek Nemesis." "I didn't watch the show," he says, looking strangely normal on this brisk afternoon in a bustling hotel here. "I did it one time, and it was...