Prime-time viewership numbers compiled by Nielsen Media Research for March 29 to April 4. 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) "CSI: Crime Scene Investigation," CBS, 26.5 million viewers.

2. (2) "American Idol,"-Tuesday, Fox, 25.9 million viewers.

3. (3) "American Idol"-Wednesday, Fox, 21.9 million viewers.

4. (4) "Survivor: All-Stars," CBS, 21.7 million viewers.

5. (7) "The Apprentice," NBC, 20.2 million viewers.

6. (9) "CSI: Miami," CBS, 19.7 million viewers.

7. (6) "ER," NBC, 19.2 million viewers.

8. (12) "Without a Trace," CBS, 18.1 million viewers.

9. (13) "Law & Order," NBC, 17.9 million viewers.

10. (X) "CBS NCAA Basketball (Semifinal): Connecticut vs. Duke," CBS, 16.7 million viewers.

11. (23) "Law & Order: SVU," NBC, 15.6 million viewers.

12. (11) "Everybody Loves Raymond," CBS, 15.4 million viewers.

13. (15) "Two and a Half Men," CBS, 14.9 million viewers.

14. (18) "Cold Case," CBS, 14.2 million viewers.

15. (26) "Fear Factor," NBC, 13.8 million viewers.

16. (4) "Friends," NBC, 13.6 million viewers.

17. (X) "CBS NCAA Basketball: Between Games Show," CBS, 13.5 million viewers.

17. (14) "Will & Grace," NBC, 13.5 million viewers.

19. (21) "Crossing Jordan," NBC, 12.9 million viewers.

20. (22) "Law & Order: Criminal Intent," NBC, 12.4 million viewers.

--AP