NBC led Tuesday among young adults behind week three of ”The Voice,” which was down more than 15% as it moved to its regular one-hour format but still beat ABC and CBS combined. CBS, with its ”NCIS” combo, led in adults 25-54 and total viewers.

According to preliminary national estimates from Nielsen, singing competition series ”The Voice” averaged a 4.6 rating/12 share in adults 18-49 and 10.3 million viewers overall in the 10 o’clock hour , down from last week’s 5.7/15 in the demo for its two-hour installment but enough to dominate the timeslot. In adults 18-34, a category in which ”The Voice” stood as primetime’s No. 1 show last week, the NBC series earned a strong 4.1/12. Kicking off the night, ”The Biggest Loser” returned to its usual two-hour format and averaged a 2.6/7 in 18-49 and 6.8 million viewers overall, peaking with a 3.2/8 in the demo at 9:30.

Elsewhere, CBS opened strong with ”NCIS” (3.5/11 in 18-49, 17.1 million viewers overall), which finished a sliver behind Fox’s ”Glee” for the lead in 18-49 while ruling the 8 o’clock hour in both adults 25-54 (4.8/13) and total viewers. It dropped off some at 9 o’clock with ”NCIS: Los Angeles” (2.8/8 in 18-49, 14.7 million viewers overall), which ranked second in most categories, and then some more at 10 p.m. with ”The Good Wife” (2.0/5 in 18-49, 11.6 million viewers overall), which came back to earth after last week’s above-average delivery.

At Fox, ”Glee” (3.6/11 in 18-49, 9.1 million viewers overall) led at 8 o’clock in all under-50 categories, followed by rookie half-hours ”Raising Hope” (2.2/6 in 18-49, 5.4 million viewers overall) and ”Traffic Light” (1.4/4 in 18-49, 3.3 million viewers overall), which were both up from last week when they opposed NBC’s ”The Voice.”

ABC opened with a ”Dancing With the Stars” recap (2.0/6 in 18-49, 11.1 million viewers overall) followed by the ”Dancing” results show at 9 (3.2/8 in 18-49, 17.1 million viewers overall), which led its hour. And at 10, ”Body of Proof” (2.1/6 in 18-49, 10.3 million viewers overall) finished slightly ahead of drama rival ”The Good Wife” in 18-49.

CW was flat week to week with its low-rated offerings, ”One Tree Hill” (0.6/2 in 18-49, 1.4 million viewers overall) and ”Hellcats” (0.5/1 in 18-49, 1.2 million viewers overall).

Preliminary 18-49 averages for the night: NBC, 3.3/9; CBS, 2.8/8; Fox, 2.7/8; ABC, 2.4/7; Univision, 1.3/4; CW, 0.5/2.

In total viewers: CBS, 14.5 million; ABC, 12.8 million; NBC, 8.0 million; Fox, 6.0 million; Univision, 3.4 million; CW, 1.3 million.