It was fairly slow going for recently introduced Monday drama series on the broadcast networks, with CW’s “The Carrie Diaries” opening sluggishly and NBC’s “Deception” looking undistinguished in its second outing.

CBS won the night with ease behind its Monday regulars and a special “The Big Bang Theory” repeat. In sweeping each half-hour in adults 18-49 and dominating in total viewers, the Eye logged its best Monday of the season.

According to preliminary national estimates from Nielsen, CW’s “The Carrie Diaries” averaged a 0.6 rating/2 share in adults 18-49 and 1.6 million viewers overall in its debut in the 8 o’clock hour — below expectations for a show the net thought of highly enough to save for a midseason launch in a less crowded environment. But even without competition from NBC’s “The Voice” — as it would have had in the fall — the prequel to “Sex and the City” based on the Candace Bushnell book series opened modestly.

In 18-49, it matched the most recent original of “90210” to air Monday at 8 for CW while drawing a larger overall audience than any show in the timeslot for the net since May 2011.

“Carrie” did a slightly better 0.7/2 in adults 18-34 but failed to resonate with teens 12-17 (0.4/1). Because “Carrie” was the first original episode of a CW series to air in the new year, the net can hope that bringing back its hit shows this week like “Arrow” and “The Vampire Diaries” can help funnel more viewers to “Carrie” next week.

A second airing of the “Carrie Diaries” pilot at 9 p.m. Monday drew a 0.4/1 in 18-49 and about 900,000 viewers overall. CW is also giving it another airing behind “Vampire Diaries” on Thursday.

At NBC, “Deception” averaged a 1.6/4 in adults 18-49 and 4.2 million viewers overall in the 10 o’clock hour, down 20% from its OK bow of last week (2.0/5, 5.66m). It had about the same lead-in as last week, as reality series “The Biggest Loser” (2.4/6 in 18-49, 6.3 million viewers overall) matched its timeslot premiere score of the previous Monday.

CBS won each of the night’s six half-hours in 18-49, 25-54 and total viewers, getting a strong leadoff performance from a season high in 18-49 for “How I Met Your Mother” (3.8/10 in 18-49, 10.4 million viewers overall), the night’s No. 1 show in adults 18-34 (3.3/11) and men 18-49 (3.7/11). It was followed by a strong repeat showing by “The Big Bang Theory” (3.6/9 in 18-49, 11.5 million viewers overall) and originals of “2 Broke Girls” (4.1/10 in 18-49, 12.2 million viewers overall) and “Mike & Molly” (3.5/9 in 18-49, 11.5 million viewers overall). “Broke” matched its season high in 18-49 and “Mike” had its second best score, with both shows hitting season bests in total viewers.

Also prevailing was 10 p.m. drama “Hawaii Five-0” (2.4/6 in 18-49, 9.4 million viewers overall), which didn’t seem to get much of a lift from its stunt in which viewers were able to vote on the ending to the crime drama but did win the hour comfortably in demos; it matched its most recent 18-49 score.

At ABC, “The Bachelor” (2.4/6 in 18-49, 7.4 million viewers overall) was up a tick from its premiere to catch NBC’s “Biggest Loser” in the battle of two-hour reality contests; the dating show was also up a bit from its second airing of last year. And closing out the night, “Castle” (1.9/5 in 18-49, 9.1 million viewers overall) ran second among the hour’s dramas, on par with last week.

Fox aired back-to-back originals of “Bones” (2.1/6 in 18-49, 8.1 million viewers overall at 8 and 2.1/5 in 18-49 and 7.8 million viewers overall for its special 9 p.m. episode). Its regular-slot hour drew the show’s largest audience of the season.

Preliminary 18-49 averages for the night: CBS, 3.3/8; ABC, 2.2/6; NBC and Fox, 2.1/5; Univision, 1.6/4; CW, 0.5/1.

In total viewers: CBS, 10.7 million; ABC, 8.0 million; Fox, 7.9 million; NBC, 5.6 million; Univision, 4.0 million; CW, 1.3 million.