Prime-time viewership numbers compiled by Nielsen Media Research for Jan. 1-7. 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. (X) NFL Playoffs: Dallas at Seattle, NBC, 26.77 million viewers.

2. (3) “CSI: Crime Scene Investigation,” CBS, 26.12 million viewers.

3. (X) “NFL Pre-Game Show,” NBC, 20.29 million viewers.

4. (2) “Desperate Housewives,” ABC, 18.71 million viewers.

5. (X) “NFL Post-Game Show,” Fox, 16.8 million viewers.

6. (21) “Law & Order: SVU,” NBC, 15.17 million viewers.

7. (X) College Football: Notre Dame vs. LSU, Fox, 14.417 million viewers.

8. (21) “Shark,” CBS, 14.416 million viewers.

9. (12) “Without a Trace,” CBS, 14.19 million viewers.

10. (15) “Cold Case,” CBS, 14.12 million viewers.

11. (X) College Football: Boise St. vs. Oklahoma, Fox, 13.78 million viewers.

12. (23) “Extreme Makeover: Home Edition,” ABC, 13.42 million viewers.

13. (37) “Law & Order: Criminal Intent,” NBC, 13.38 million viewers.

14. (15) “NCIS,” CBS, 13.05 million.

15. (X) “CSI: Crime Scene Investigation,” (Thursday, 8 p.m.), CBS, 13.02 million viewers.

16. (35) “Numb3rs,” CBS, 12.35 million viewers.

17. (6) “CSI: Miami,” CBS, 12.15 million viewers.

18. (X) “Two and a Half Men,” CBS, 12.1 million viewers.

19. (9) “Criminal Minds,” CBS, 11.96 million viewers.

20. (24) “Brothers & Sisters,” ABC, 11.87 million viewers.