Prime-time viewership numbers compiled by Nielsen Media Research for May 12-18. 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) ``Friends,'' NBC, 25.5 million viewers.

2. (7) ``American Idol-Wednesday,'' Fox, 25.3 million viewers.

3. (1) ``CSI: Crime Scene Investigation,'' CBS, 23.9 million viewers.

4. (5) ``American Idol-Tuesday,'' Fox, 23.4 million viewers.

5. (4) ``ER,'' NBC, 21.6 million viewers.

6. (12) ``Will & Grace,'' NBC, 20.3 million viewers.

7. (8) ``Everybody Loves Raymond,'' CBS, 18.7 million viewers.

8. (9) ``Law & Order,'' NBC, 18.3 million viewers.

9. (12) ``CSI: Miami,'' CBS, 17.2 million viewers.

10. (18) ``Law & Order: Criminal Intent, 10 p.m.,'' NBC, 16.2 million viewers.

11. (72) ``The Bernie Mac Show,'' Fox, 15.8 million viewers.

12. (17) ``Without a Trace,'' CBS, 15.7 million viewers.

13. (22) ``Still Standing,'' CBS, 15.5 million viewers.

14. (X) ``The Bachelor-Sunday,'' ABC, 15.1 million viewers.

15. (22) ``Law & Order: Criminal Intent,'' NBC, 14.5 million viewers.

16. (24) ``The West Wing,'' NBC, 13.8 million viewers.

17. (16) ``Law & Order: Special Victims Unit,'' NBC, 13.7 million viewers.

18. (46) ``CBS Sunday Movie: Hitler: The Rise of Evil, Part 1,'' CBS, 13.6 million viewers.

19. (64) ``That '70s Show,'' Fox, 13.6 million viewers.

20. (X) ``The Simpsons,'' Fox, 13.4 million viewers.