Despite a potent lead-in from “The Voice,” NBC’s new Howie Mandel gameshow “Take It All” produced only decent numbers Monday with the first of its six-night run. CBS finished on top behind an extra original episode of “2 Broke Girls” and a season high for “Hawaii Five-0.”

The Eye won among the Big Four in all categories for the first Monday this season, taking advantage of softness at the competition and benefiting from being the only scripted option among the major nets. CBS could come down in the nationals as its preliminary numbers include a preemption in Houston for the Texans playing on “Monday Night Football.”

According to preliminary national estimates from Nielsen, CBS started strong with “How I Met Your Mother” (3.3 rating/9 share in adults 18-49, 9.1 million viewers overall, up week to week and finishing a close second in 18-49 and tying “The Voice” in 18-34 (2.8/9). A special repeat of “The Big Bang Theory” certainly helped at 8:30 (3.3/8 in 18-49, 10.4 million viewers overall), and that 50% stronger lead-in from last week helped “2 Broke Girls” (4.0/10 in 18-49, 11.8 million viewers overall) grow 14% week to week for its second best score of the fall; a special original “2 Broke Girls” followed at 9:30 (3.9/9 in 18-49, 11.5 million viewers overall), doing about 25% better than last week’s “Mike & Molly.”

And at 10, “Hawaii Five-0” (2.7/7 in 18-49, 10.4 million viewers overall) hit a season high in 18-49 opposite a repeat on ABC and a music special on NBC.

At NBC, “The Voice” (3.8/10 in 18-49, 12.2 million viewers overall) was up slightly week to week as it prepares to wrap next week; it could pass “2 Broke Girls” as the night’s top entertainment series in 18-49 when the nationals come in. The music contest was followed by “Take It All” (2.2/5 in 18-49, 7.2 million viewers overall), which placed second among the Big Four in the 9 o’clock hour in the first of its four airings this week. And closing out the night, “Michael Buble: Home for the Holidays” did a 1.4/4 in 18-49 and 5.8 million viewers overall — well down from last week’s Blake Shelton music special, though Shelton enjoyed a lead-in from “The Voice,” on which he is a judge.

Fox’s annual “American Country Awards,” hosted by Trace Adkins and Kristin Chenoweth, didn’t do much (1.4/4 in 18-49, 5.1 million viewers overall) — matching what the net’s drama duo “Bones” and “The Mob Doctor” produced a week ago. It was down about 30% from last year’s telecast, though that faced softer competition from NBC (“The Sing Off”) and a weak “Monday Night Football” contest (San Diego-Jacksonville).

Univision moved ahead of both ABC and Fox on the night behind its novelas “Por Ella Soy Eva” (1.7/5 in 18-49, 4.1 million viewers overall) and “Amores Verdaderos” (1.6/4 in 18-49, 3.9 million viewers overall).

CW matched or set Monday regular-program season highs in various categories as “90210” (0.6/2 in 18-49, 1.2 million viewers overall) and “Gossip Girl” (0.5/1 in 18-49, 1.0 million viewers overall) both grew. “Gossip” hit a season high in adults 18-34 (0.7/2) one week from its final episode.

Preliminary 18-49 averages for the night: CBS, 3.3/8; NBC, 2.5/6; Univision, 1.5/4; Fox, 1.4/4; ABC, 1.4/3; CW, 0.5/1.

In total viewers: CBS, 10.6 million; NBC, 8.4 million; ABC, 5.6 million; Fox, 5.1 million; Univision, 3.7 million; CW, 1.1 million.