An NBC franchise series saw its viewer numbers drop significantly for its season premiere Tuesday night, but the network got a strong performance out of another franchise show to squeeze out a narrow win for the night over CBS, based on Nielsen overnights for the key 18-49 demo.

TVbytheNumbers.com reports that the one-hour season opener of "The Biggest Loser" settled for a 2.2 average in viewers 18-49, finishing third in the 8 p.m. hour behind CBS’s "NCIS" (3.0 average, up 7% from a week ago) and ABC’s "Marvel’s Agents of S.H.I.E.L.D." (2.7 average, down 7%). The "Loser" premiere’s number was down 27% from the two-hour premiere one season ago, when the show premiered on a Sunday.

But "The Voice" came through for NBC, delivering a 3.9 average in the 18-49 demo to rank as the top show of the night among the broadcast networks. That number was up 30% over a clip show that aired last week, but down 13% from the previous Tuesday night original.

"Chicago Fire" wrapped up prime time for NBC by winning the 10 p.m. hour with a 2.4 average in 18-49, a 14% improvement on last week.

Following "NCIS," CBS aired the 100th episode of "NCIS: Los Angeles," which matched last week’s 2.6 average in viewers 18-49. "Person of Interest" bounced back a little from last week’s series low, rising 5% to a 2.1.

Leading out from "Marvel’s Agents," ABC’s freshman series "The Goldbergs" sank 16% to a new series low, a 1.6 average rating in adults 18-49. "Trophy Wife" shed 7% of last week’s average to notch a 1.3, and ABC closed things out with a repeat of "Scandal" (0.7 average).

Fourth-place Fox had mixed results, with "Dads" up 8% from a week ago to a 1.4 in 18-49, "New Girl" down 14% to a 1.8 and both "Brooklyn Nine-Nine" (1.5 average) and "The Mindy Project" (1.4) equaling their numbers from a week ago.

For prime time overall, NBC led the broadcast networks with a 2.8 average in adults 18-49, followed by CBS (2.6 average), ABC (1.6), Fox (1.5) and Univision (1.1). CBS wound up with a big lead in total viewers, averaging 15.2 million to finish ahead of NBC (9.3 million), ABC (5.0 million), Fox (3.3 million) and Univision (3.0 million).