Primetime Preliminary Fast National Nielsen Data
(includes all DVR playback through 3:00 am)

Here are the highlights of the 14 ad-sustained programs that aired in primetime on the broadcast networks last night (3/17/21):

FOX (3.773 million viewers, #2; adults 18-49: 0.9, #1) held onto the demo crown on Wednesday thanks to new episodes of "The Masked Singer" (4.817 million viewers, #4; adults 18-49: 1.1, #1) and "Game of Talents" (2.729 million viewers, #6; adults 18-49: 0.7, #T4).

NBC (6.700 million viewers, #1; adults 18-49: 0.8, #2) was a close second with its trio of "Chicago Med" (6.788 million viewers, #2; adults 18-49: 0.7, #T4), "Chicago Fire" (7.194 million viewers, #1; adults 18-49: 0.8, #T2) and "Chicago PD" (6.118 million viewers, #3; adults 18-49: 0.8, #T2).

Next up was CBS (1.952 million viewers, #3; adults 18-49: 0.3, #T3) with a new "Tough as Nails" (2.827 million viewers, #5; adults 18-49: 0.4, #T7) and its two-hour special "A Grammy Salute to the Sounds of Change" (1.514 million viewers, #11; adults 18-49: 0.2, #T10).

Meanwhile, ABC (1.808 million viewers, #4; adults 18-49: 0.3, #T3) opted for repeats of "The Goldbergs" (2.580 million viewers, #7; adults 18-49: 0.5, #6), "American Housewife" (1.869 million viewers, #8; adults 18-49: 0.4, #T7), "The Conners" (1.730 million viewers, #9; adults 18-49: 0.3, #9) and "Call Your Mother" (1.426 million viewers, #12; adults 18-49: 0.2, #T10) plus a new "The Con" (1.621 million viewers, #10; adults 18-49: 0.2, #T10).

And finally, The CW (0.445 million viewers, #5; adults 18-49: 0.1, #5) closed out the night with new episodes of "Riverdale" (0.499 million viewers, #13; adults 18-49: 0.1, #T13) and "Nancy Drew" (0.391 million viewers, #14; adults 18-49: 0.1, #T13).

Week-to-week changes (adults 18-49):
0.00% - Chicago PD
0.00% - Game of Talents
0.00% - Tough as Nails
0.00% - The Con
0.00% - Riverdale
0.00% - Nancy Drew
-8.33% - The Masked Singer
-11.11% - Chicago Fire
-30.00% - Chicago Med

Year-to-year changes (adults 18-49):
-33.33% - Chicago PD
-38.46% - Chicago Fire
-41.67% - Game of Talents (vs. LEGO Masters)
-46.15% - Chicago Med
-50.00% - Riverdale (vs. Penn & Teller: Fool Us (Repeat))
-50.00% - Nancy Drew (vs. Whose Line Is It Anyway? (Repeats))
-50.00% - The Masked Singer
-60.00% - The Con (vs. Stumptown)
-71.43% - A Grammy Salute to the Sounds of Change (vs. SEAL Team/SWAT)
-73.33% - Tough as Nails (vs. Survivor: Winners at War)

Here are the highlights of the 16 ad-sustained programs that aired in primetime on the broadcast networks one year ago (3/18/20):

FOX (5.853 million viewers, #2; adults 18-49: 1.7, #1) continued its seven-week win streak with new episodes of "The Masked Singer" (7.856 million viewers, #3; adults 18-49: 2.2, #1) and "LEGO Masters" (3.849 million viewers, #10; adults 18-49: 1.2, #T5).

NBC (8.526 million viewers, #1; adults 18-49: 1.3, #2) then was the silver draw with its trio of "Chicago Med" (9.120 million viewers, #1; adults 18-49: 1.3, #T3), "Chicago Fire" (8.896 million viewers, #2; adults 18-49: 1.3, #T3) and "Chicago PD" (7.561 million viewers, #5; adults 18-49: 1.2, #T5).

Next up was CBS (5.605 million viewers, #3; adults 18-49: 1.0, #3) and its mix of "Survivor: Winners at War" (7.704 million viewers, #4; adults 18-49: 1.5, #2), "SEAL Team" (5.013 million viewers, #6; adults 18-49: 0.8, #T9) and "SWAT" (4.097 million viewers, #9; adults 18-49: 0.6, #T11).

Meanwhile, ABC (3.554 million viewers, #4; adults 18-49: 0.7, #4) served up its new lineup of "The Goldbergs" (4.937 million viewers, #7; adults 18-49: 1.1, #7), "Schooled" (3.503 million viewers, #11; adults 18-49: 0.8, #T9), "Modern Family" (4.300 million viewers, #8; adults 18-49: 0.9, #8), the relocated "American Housewife" (3.177 million viewers, #12; adults 18-49: 0.6, #T11) and "Stumptown" (2.704 million viewers, #13; adults 18-49: 0.5, #13).

And finally, The CW (0.957 million viewers, #5; adults 18-49: 0.2, #5) opted for repeats of "Penn & Teller: Fool Us" (1.044 million viewers, #14; adults 18-49: 0.2, #T14), "Whose Line Is It Anyway?" (0.897 million viewers, #15; adults 18-49: 0.2, #T14) and another "Whose Line Is It Anyway?" (0.845 million viewers, #16; adults 18-49: 0.2, #T14) to close out the night.

Week-to-week changes (adults 18-49):
+37.50% - The Goldbergs (vs. 2/26/20)
+33.33% - Schooled (vs. 2/19/20)
+30.00% - Chicago Med (vs. 3/5/20)
+28.57% - Modern Family (vs. 2/19/20)
+25.00% - Stumptown (vs. 3/5/20)
+20.00% - Chicago PD (vs. 3/5/20)
+20.00% - LEGO Masters
+20.00% - American Housewife (vs. 1/31/20)
+18.18% - Chicago Fire (vs. 3/5/20)
+15.79% - The Masked Singer
+15.38% - Survivor: Winners at War
+14.29% - SEAL Team
0.00% - SEAL Team

Year-to-year changes (adults 18-49):
+140.00% - Chicago PD (vs. buble!)
+100.00% - The Masked Singer (vs. Empire)
+30.00% - Chicago Med (vs. The Voice: The Best of the Blinds (Repeat))
+30.00% - Chicago Fire (vs. The Voice: The Best of the Blinds (Repeat))
+20.00% - LEGO Masters (vs. Star)
+7.14% - Survivor: Winners at War
-8.33% - The Goldbergs
-11.11% - Schooled
-14.29% - American Housewife (vs. Single Parents)
-14.29% - SWAT (vs. SEAL Team)
-16.67% - Stumptown (vs. Whiskey Cavalier)
-18.18% - Modern Family
-38.46% - SEAL Team (vs. Survivor: Edge of Extinction)

Source: Nielsen Media Research, ShowBuzzDaily.com