NEW YORK (AP) _ Prime-time viewership numbers compiled by Nielsen Media Research for Jan. 23-29. Top 20 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. (1) ``American Idol'' (Tuesday), Fox, 35.0 million viewers.

2. (2) ``American Idol'' (Wednesday), Fox, 32.4 million viewers.

3. (3) ``CSI: Crime Scene Investigation,'' CBS, 25.9 million viewers.

4. (5) ``Without a Trace,'' CBS, 22.3 million viewers.

5. (6) ``CSI: Miami,'' CBS, 19.7 million viewers.

6. (7) ``Dancing With the Stars'' (Thursday), ABC, 19.3 million viewers.

7. (11) ``Lost,'' ABC, 19.1 million viewers.

8. (8) ``Grey's Anatomy,'' ABC, 18.4 million viewers.

9. (13) ``Two and a Half Men,'' CBS, 17.0 million viewers.

10. (11) ``NCIS,'' CBS, 17.0 million viewers.

11. (14) ``Cold Case,'' CBS, 17.0 million viewers.

12. (19) ``Extreme Makeover: Home Edition,'' ABC, 16.2 million viewers.

13. (15) ``Courting Alex,'' CBS, 14.9 million viewers.

14. (18) ``CSI: NY,'' CBS, 14.9 million viewers.

15. (24) ``Criminal Minds,'' CBS, 14.6 million viewers.

16. (24) ``24,'' Fox, 14.2 million viewers.

17. (15) ``60 Minutes,'' CBS, 14.2 million viewers.

18. (19) ``Dancing With the Stars'' (Friday), ABC, 14.0 million viewers.

19. (4) ``Desperate Housewives,'' ABC, 13.9 million viewers.

20. (X) ``CSI: Crime Scene Investigation'' special, CBS, 13.5 million viewers.