Ratings Chart Attack!

“American Idol” took first for another night, but did so with its lowest-rated Tuesday telecast this season.

An hourlong “American Idol” posted a 10.5 in the 18-49 demographic Tuesday, according to preliminary Nielsen numbers.

“Idol,” along with newcomer “New Amsterdam” (4.6), boosted Fox to a Tuesday win with a 7.5.

“New Amsterdam’s” premiere was down 56% from the time period’s average for the previous four weeks, when the slot housed mainly extended episodes of “Idol.”

“The Biggest Loser: Couples” (3.5) gained ground from last week, improving 21% as the show winds down to its finale. NBC placed second with a 3.3.

“Jericho” slipped 18% from last week, ending up with a 1.8, while “Big Brother” stayed just about on par with its previous season average with a 2.5. CBS was third for the night with a 2.1.

“Jericho” fans, take note: Nielsen Live Plus 7-Day just came back from “Jericho’s” season premiere from three weeks ago, and DVR views spiked the 18- to 49-year-old ratings by 15% (2.6 to 3.0). That season premiere was also streamed about 700,000 times from CBS.com during for the first two weeks it was available (Feb. 12-25).

CBS is taking note of the digital views, so please hold off on a second round of nut bombing for now.

ABC was fourth (1.8) with its Monday comedies and the second week of “Primetime: What Would You Do?” slipping 21% from last week’s premiere to end with a 2.3.

The CW took fifth with a 1.1, but a new “One Tree Hill” (1.5) hit a two-month high in both the 18-49 demo and the show’s 18-34 target demo with a 2.1.