Complex sentence: A sneak preview of the series after UPN's highly rated "WWF Smackdown!" drew 4.52 million viewers, however, when the series was moved to its scheduled 8 p.m. timeslot, ratings dropped.
Split into simpler sentences: A sneak preview of the series after UPN's highly rated "WWF Smackdown!" drew 4.52 million viewers. However, when the series was moved to its scheduled 8 p.m. timeslot, ratings dropped.