CBS' ratings juggernaut NCIS hit a season high with 20.31 million viewers Tuesday night, preliminary Nielsen data shows.

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It also posted a 4.1 rating among industry-prized 18-to-49-year-olds in prime time's first hour against ABC's tandem of Tim Allen's Last Man Standing and Man Up!,  which attracted 9.21 million people (2.6 demo rating) and 6.22 million (1.7), respectively, while Fox's Glee and the first hour of NBC's The Biggest Loser lured 6.90 million (3.1) and 6.73 million (2.3), respectively. The CW's 90210 delivered 1.55 million (0.8).

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At 9/8c, NCIS: Los Angeles won the hour with a viewership of 15.59 million (3.4 demo rating) vs. Dancing with the Stars' results show (14.85 million/2.7) and the second part of Loser (6.89 million/2.5). On Fox, New Girl and Raising Hope pulled in 6.80 million fans and 3.5 demo rating and 4.62 million/2.1, respectively. The CW's Ringer episode had 1.67 million (0.7).

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Unforgettable kept up its winning ways in prime time's final hour Tuesday with 11.62 million viewers (2.4 demo rating) vs. an ABC News special (8.64 million/1.7) and Parenthood (5.24 million/2.0).