NBC has beaten its rivals in key demos for an eighth straight Monday behind “The Voice” and “The Blacklist,” with the former at a season low but still easily the night’s top entertainment series and the latter seeing a slight bounce for its fall finale.

Also of note, ABC had one of its best Mondays in a while with “Dancing With the Stars” and the wedding episode of “Castle” while CBS’ “Scorpion” fell off as it continues to be saddled with a softer lead-in.

According to preliminary national estimates from Nielsen, “The Voice” (3.2 rating/9 share in adults 18-49, 11.4 million viewers overall) was down a couple of ticks to its Monday season low as the show kicked off its live playoffs, but it won among the Big Four in 18-49 in all four half-hours from 8 to 10. And at 10 p.m., the final episode of “The Blacklist” for nearly three months averaged a 2.5/7 in 18-49 and 9.7 million viewers overall, up a smidge from last week. (On the comparable night a year ago, both “The Voice” and “Blacklist” were about half a ratings point higher.)

Last week’s “Blacklist” delivered a season-high 67% increase in adults 18-49 rating (from 2.37 to 3.97) and its largest total-viewer growth (5.35 million) since April; in the latter category, it leapfrogged “Dancing With the Stars” as the night’s No. 1 program after lagging well behind it in the same-night numbers. The show is off until its post-Super Bowl episode on Feb. 1, and is  scheduled to move to its new night, Thursday, four days later.

Katherine Heigl drama “State of Affairs” premieres next Monday on NBC.

At CBS, “2 Broke Girls” (1.9/6 in 18-49, 7.6 million viewers overall) and “The Millers” (1.5/4 in 18-49, 6.5 million viewers overall) drew their lowest scores since bowing last month, and that led into “Scorpion” (2.0/5 in 18-49, 10.0 million viewers overall), which was down 0.1 or 0.2 (depending on the nationals) to its low but built sharply over its lead-in (by 33% in 18-49 and by more than 50% in total viewers). Last week’s “Scorpion” gained 1.1 ratings points in 18-49 and a best-yet 4.04 million total viewers with three days of DVR playback.

“NCIS: Los Angeles” (1.5/4 in 18-49, 8.2 million viewers overall) was steady week to week at 10 o’clock for CBS. It continues to provide the network with nice time period improvement over last year’s “Hostages,” and is likely contributing to lower numbers vs. last year for both “The Blacklist” and “Castle.”

Fox’s “Gotham” (2.2/7 in 18-49, 6.3 million viewers overall) was down a bit to equal its low, and “Sleepy Hollow” (1.5/4 in 18-49, 4.6 million viewers overall) matched its season low of last week. “Gotham” was Monday’s No. 1 entertainment series in all key male demos, hitting a five-week high in men 18-34 (2.1/8).

At ABC, “Dancing With the Stars” (2.1/6 in 18-49, 13.4 million viewers overall) was at a season high in 18-49, though a pre-emption for an NFL game on the net’s station in Charlotte likely inflated the prelim numbers; still, this figures to be the show’s strongest finish of the season relative to reality rival “The Voice.” “Castle” finished things off for the Alphabet (1.7/5 in 18-49, 9.7 million viewers overall), up over its prior two episodes but down from the same night last year.

If the numbers hold, this would be ABC’s best Monday among young adults in four weeks and its largest overall audience on the night this fall.

CW’s “The Originals” (0.7/2 in 18-49, 1.5 million viewers overall) and “Jane the Virgin” (0.5/1 in 18-49, 1.2 million viewers overall) were both up from last week, though the net appears to have had a pre-emption in New York, which could bring its numbers down. If it holds up in the nationals, this would be the most-watched episode of “Originals” this season.

Preliminary 18-49 averages for the night: NBC, 3.0/9; ABC, 1.9/6; Fox, 1.9/5; CBS, 1.7/5; Univision, 1.0/3; CW and Telemundo, 0.6/2.

In total viewers: ABC, 12.1 million; NBC, 10.8 million; CBS, 8.4 million; Fox, 5.5 million; Univision, 2.8 million; CW, 1.4 million; Telemundo, 1.3 million.