NBC scored another Tuesday victory on the strength of sturdy numbers for “The Biggest Loser” and some of the best-ever scores for “Law & Order: Special Victims Unit,” according to preliminary nationals from Nielsen.

The 90-minute conclusion of weight-loss series “The Biggest Loser” (5.9 rating/15 share in adults 18-49, 13.7 million viewers overall) established ratings highs for the show and produced the best results with regular programming in the time period for NBC since February 2002. Net also rolled at 10 with season highs for drama “Law & Order: SVU” (6.5/17 in adults 18-49, 16 million viewers overall), while 9:30 laffer “Committed” again performed reasonably well in between (4.4/11 in adults 18-49, 10 million viewers overall).

ABC’s comedies had a solid night, paced by “According to Jim” (4.3/10 in adults 18-49, 11.1 million viewers overall) and “George Lopez” (3.8/10 in adults 18-49, 9.1 million viewers overall), and the net placed second in demos at 10 with “NYPD Blue” (3.3/8 in adults 18-49, 9.6 million viewers overall).

CBS was a steady No. 2 at 8 o’clock with “NCIS” (3.7/10 in adults 18-49, 15.6 million viewers overall) and at 9 with “The Amazing Race” (4.3/10 in adults 18-49, 11.4 million viewers overall), while Fox predictably did little with the two-hour finale of unscripted dud “Rebel Billionaire” (1.6/4 in adults 18-49, 3.7 million viewers overall).

Preliminary 18-49 averages for the night: NBC, 5.9/15; ABC, 3.7/9; CBS, 3.7/9; Fox, 1.6/4; UPN, 1.2/3; WB, 1.1/3.

In total viewers: NBC, 13.9 million; CBS, 12.6 million; ABC, 9.7 million; Fox, 3.7 million; UPN, 3.2 million; WB, 2.6 million.