Prime-time viewership numbers compiled by Nielsen Media Research for Nov. 20-26. Listings include the week’s ranking, with viewership for the week and season-to-date rankings in parentheses. An “X” in parentheses denotes a one-time-only presentation.

1. (2) “Desperate Housewives,” ABC, 21.43 million viewers.

2. (6) “CSI: Miami,” CBS, 18.54 million viewers.

3. (1) “Grey’s Anatomy,” ABC, 18.51 million viewers.

4. (X) “Fox NFL Sunday Postgame,” Fox, 17.59 million viewers.

5. (X) “Fox NFL Thursday Postgame,” Fox, 17.19 million viewers.

6. (3) “CSI: Crime Scene Investigation,” CBS, 17.17 million viewers.

7. (15) “NCIS,” CBS, 17.00 million viewers.

8. (14) “Deal or No Deal” (Monday), NBC, 16.97 million viewers.

9. (8) “Criminal Minds,” CBS, 16.56 million viewers.

10. (25) “Heroes,” NBC, 16.03 million viewers.

11. (9) “CSI: NY,” CBS, 15.31 million viewers.

12. (7) “NBC Sunday Night Football,” NBC, 15.22 million viewers.

13. (16) “House,” Fox, 15.20 million viewers.

14. (11) “Two And a Half Men,” CBS, 15.04 million viewers.

15. (25) “Extreme Makeover: Home Edition,” ABC, 14.65 million viewers.

16. (69) “Saturday Night Football,” ABC, 14.64 million viewers.

17. (18) “Law & Order: SVU,” NBC, 14.20 million viewers.

18. (X) “Boston Legal” (Special 11/26), ABC, 13.47 million viewers.

19. (12) “60 Minutes,” CBS, 13.18 million viewers.

20. (X) “E.R.” (Special 11/23), NBC, 13.04 million viewers.

By The Associated Press