NBC won the demo prize in the Nielsens yet again: For the third straight week, the Peacock network was tops among viewers aged 18-49. That hasn’t happened in a decade. The network was buoyed, of course, by the performances of ‘Sunday Night Football’ (number one with nearly 20 million viewers) and ‘The Voice.’

CBS won the week again with total viewers and was a close second in the 18-49 demo. Not surprisingly, shows like ‘NCIS’ and ‘The Big Bang Theory’ managed to crack the Top 5. ABC saw a strong performance from a double run of ‘Modern Family’ on Wednesday night, while FOX continues to get decent numbers from ‘The X Factor.’

Over on cable, AMC is very much alive with the premiere of ‘The Walking Dead,’ which posted its best numbers yet and beat the big networks among young viewers in the time slot.

Here’s a look at the Top 20:

1. NFL Football: Green Bay at Houston, NBC, 19.92 million.

2. "NCIS," CBS, 18.51 million.

3. "Sunday Night NFL Pre-Kick," NBC, 15.72 million.

4. "NCIS: Los Angeles," CBS, 15.18 million.

5. "The Big Bang Theory," CBS, 14.23 million.

6. "Dancing With the Stars," ABC, 13.55 million.

7. "Dancing With the Stars Results," ABC, 13.33 million.

8. "The Voice" (Monday), NBC, 12.89 million.

9. "Modern Family" (Wednesday, 9:30 p.m.), ABC, 12.31 million.

10. "The Voice" (Tuesday), 12.19 million.

11. "Modern Family" (Wednesday, 9 p.m.), ABC, 12.08 million.

12. "Football Night in America," NBC, 11.83 million.

13. "Vegas," CBS, 11.78 million.

14. "60 Minutes," CBS, 11.58 million.

15. "Criminal Minds," CBS, 11.49 million.

16. "Two and a Half Men," CBS, 11.35 million.

17. "The OT," Fox, 11.04 million.

18. "The Mentalist," CBS, 10.74 million.

19. "CSI: Crime Scene Investigation," CBS, 10.7 million.

20. "Castle," ABC, 10.61 million.