List of top 20 shows in prime-time Nielsen ratings

Prime-time viewership numbers compiled by Nielsen Media Research for March 30-April 5. 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) "American Idol" (Tuesday), Fox, 24.41 million viewers.

2. (1) "American Idol" (Wednesday), Fox, 24.34 million viewers.

3. (3) "Dancing With the Stars," ABC, 20.48 million viewers.

4. (5) "NCIS," CBS, 17.23 million viewers.

5. (8) "The Mentalist," CBS, 16.96 million viewers.

6. (42) "ER," NBC, 16.38 million viewers.

7. (X) Academy of Country Music Awards, CBS, 14.78 million viewers.

8. (4) "CSI: Crime Scene Investigation," CBS, 14.63 million viewers.

9. (11) "Two and a Half Men," CBS, 14.56 million viewers.

10. (X) CBS NCAA Basketball Semifinal: Villanova vs. North Carolina, CBS, 14.45 million viewers.

11. (7) "Dancing With the Stars Results," ABC, 13.51 million viewers.

12. (13) "CSI: Miami," CBS, 13.46 million viewers.

13. (X) CBS NCAA Basketball Between Games Show, CBS, 12.95 million viewers.

14. (18) "Without a Trace," CBS, 12.53 million viewers.

15. (18) "House," Fox, 12.51 million viewers.

16. (9) "60 Minutes," CBS, 12.27 million viewers.

17. (16) "Survivor: Tocantins," CBS, 11.27 million viewers.

18. (20) "24," Fox, 11.26 million viewers.

19. (27) "Rules of Engagement," CBS, 11.02 million viewers.

20. (X) "ER Retrospective," NBC, 10.63 million viewers.

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ABC is owned by The Walt Disney Co. CBS is a division of CBS Corp. Fox is a unit of News Corp. NBC is owned by General Electric Co.

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