Fast National ratings for Tuesday, February 28, 2012.
 
The season's first "American Idol" performance show carried FOX to Tuesday night wins, including a commanding victory among young viewers, but in their head-to-head hour, CBS' "NCIS" had a commanding lead in total viewers.
 
Meanwhile, the presence of "Idol" helped send a slew of shows on a downward trajectory from last week, including ABC's "Last Man Standing," "Cougar Town" and "The River," plus The CW's "Ringer."
 
Among adults 18-49, FOX averaged a 5.0 rating among adults 18-49, with CBS coming in a distant second in the key demographic with a 2.8 rating. NBC averaged a 2.0 rating, followed by ABC's 1.6 rating. The CW averaged a 0.4 rating for the night. 
 
Overall, though, things were far closer. FOX won the night with a 9.3 rating/14 share and 15.835 million viewers, compared to 14.54 million viewers and a 9.2/14 for CBS, but obviously CBS won the 8-to-10 p.m. portion of primetime. ABC's 3.6/6 and 5.56 million viewers nipped the 3.5/5 and 5.5 million viewers for NBC. The CW averaged a 0.7/1 and 999,000 viewers.
 
8 p.m. - CBS started the night in first overall with 18.01 million viewers for "NCIS," coming in second with a 3.4 rating among adults 18-49. FOX's "American Idol" averaged 15.62 million viewers for second and won the hour with a 4.9 key demo rating. ABC was third overall and fourth in the demo with "Last Man Standing" (7.375 million viewers and a 2.1 key demo rating) and "Cougar Town" (4.3 million viewers and a 1.5 key demo rating), which both dropped against "Idol," but not hugely. NBC's "The Biggest Loser" averaged 5.48 million viewers and a 1.9 key demo rating. On The CW, a repeat of "Hart of Dixie" averaged 893,000 viewers.
 
9 p.m. - "American Idol" rose to 16.05 million viewers and a 5.1 rating among adults 18-49 to claim the 9 p.m. hour. CBS slipped to second with 15.67 million viewers and a 3.1 key demo rating for "NCIS: Los Angeles," which was actually up from last week among young viewers. NBC's "The Biggest Loser" averaged 5.89 million viewers and a 2.1 key demo rating in third. It was another week of dropping numbers for "The River," which averaged 4.09 million viewers and a 1.5 key demo rating for ABC. The CW's "Ringer" averaged 1.11 million viewers and a 0.4 key demo rating.
 
10 p.m. - CBS' "Unforgettable" lost more viewers this week, averaging 9.93 million and tied for the hour lead with a 1.9 rating among adults 18-49. ABC's "Body of Proof" was second with 6.75 million viewers and third with a 1.3 key demo rating. On NBC, "Parenthood" got a small bump for its season finale and averaged 5.13 million viewers and a 1.9 key demo rating.
 
 
All ratings information comes from preliminary Fast National Nielsen data, which includes live and same-day DVR viewing. All numbers are subject to change.