Evening News Evening News Ratings: Week of Aug. 21 By Brian on Aug. 29, 2006 - 11:24 AM NBC Nightly News was #1 in all categories last week. For the week of Aug. 21: Total viewers: NBC: 8,150,000 / ABC: 7,260,000 / CBS: 7,070,000 25-54 demo: NBC: 2.2/9 / ABC: 2.0/9 / CBS: 1.9/8 Advertisement