The Season 3 premiere of “Supergirl” and the series premiere of “Valor” failed to lift the CW from last place among the broadcast networks in the Monday overnight ratings, according to Nielsen data.

Airing at 8 p.m., “Supergirl” averaged a 0.5 rating in adults 18-49 and 1.9 million total viewers. That is a drop off of over 50 percent in the key demo and nearly 40 percent in total viewers from the Season 2 premiere.

“Valor” followed at 9 p.m. The new military drama pulled in a 0.3 and 1.2 million viewers. For comparison, the series premieres of the now-cancelled shows “Frequency” and “No Tomorrow” on The CW last season drew a 0.4 and 1.4 million viewers and a 0.5 and 1.5 million viewers respectively.

On NBC, “The Voice” (2.5, 10.8 million) was steady. “The Brave” (1.2, 5.3 million) was up slightly in the demo.

On CBS, “The Big Bang Theory” (2.8, 13.1 million) dipped in the demo but was still easily the top-rated and most-watched show of the night. “9JKL” (1.5, 7.7 million) and “Kevin Can Wait” (1.4, 6.7 million) were even, while “Me, Myself, and I” (1.1, 5 million) was up slightly in the demo.

For ABC, “Dancing with the Stars” (1.3, 9.1 million) was even. “The Good Doctor” (1.9, 10.6 million) was down slightly in the demo.

On Fox, “Lucifer” (0.9, 3.3 million) was down in both measures, as was “The Gifted” (1.2, 3.9 million).

NBC won the night in the demo with a 2.0 but finished second in total viewers with 9 million. ABC and CBS tied for second in the demo with a 1.5 but ABC was first in total viewers with 9.6 million. CBS was third in total viewers with 7.2 million. Fox was fourth overall with a 1.1 and 3.6 million viewers. The CW averaged a 0.4 and 1.5 million viewers.