NBC continued to ride its workhorse reality competition "The Voice" and its new hit drama "The Blacklist" to Monday ratings success, easily winning last night’s broadcast race, based on Nielsen overnights for the key 18-49 demo. Meanwhile, things were grim at ABC, where its prime-time lineup came in at season lows.

TVbytheNumbers.com reports that the Peacock Network’s two-hour installment of "The Voice" was by far the top show on broadcast prime, registering a 4.2 average in viewers 18-49. This result came even as the show fell to a season low for a Monday night, losing three-tenths of a ratings point from last week. "The Blacklist" was the No. 2 show of the night with a 3.0, the same number it delivered a week ago.

Second-place CBS was paced by "How I Met Your Mother" with a 2.9 in 18-49, off two-tenths from a week ago. "Mom" surged four-tenths to a 2.4 average, "Hostages" ticked up two-tenths to a 1.4, and "2 Broke Girls" equaled the 2.6 it recorded last week, while a repeat of "The Big Bang Theory" came through with a 2.5.

Numbers for CBS are subject to more than the usual adjustments due to a football simulcast, the report notes.

ABC had a rough night, with both "Dancing with the Stars" and "Castle" at season lows. The two-hour "Dancing" fell by two-tenths from a week ago to a 1.9 in the 18-49 demo, setting a new season low, while "Castle" lost three tenths to equal its season low, also a 1.9.

Fourth-place Fox saw "Bones" inch up one-tenth of a point to a 2.1 in adults 18-49. A repeat of "Sleepy Hollow" delivered a 1.0.

For prime time overall, NBC finished well ahead of the pack in the 18-49 demo with a 3.8 average, ahead of CBS (2.2 average), ABC (1.9), Fox (1.6) and Univision (1.3). NBC claimed a narrow win in total viewers, averaging 12.5 million to top ABC (12.3 million), CBS (7.3 million), Fox (5.4 million) and Univision (3.4 million).