There's nothing subtly creepy in ''Revelations," NBC's new miniseries about the end of the world. It's a stark mash of lightning storms and glaring Satanists and overly dramatic music that shouts too loudly for its own good. As it leaps from Ominous Religious Event to Ominous Religious Event, the first hourlong chapter of this six-part series could easily have been called ''Hellsapoppin!"
The hyped-up premiere, tomorrow at 9 p.m. on Channel 7, follows a Roman Catholic nun and a Harvard professor as they search out signs of the apocalypse, as defined by the Book of Revelation. Natascha McElhone's Sister Josepha is a rebel thinker whose sect is not recognized by the Vatican; Bill Pullman's astrophysicist Richard Massey is grieving the murder of his daughter by a religious madman. Together, they embark on an investigation of whether or not we have reached the End of Days, when Christ will reappear on Earth.