National Nielsen Viewership Here are the rankings for national prime-time network television last week (Sept. 22-28) as compiled by Nielsen Media Research. They are based on the average number of people who watched a program from start to finish. Nielsen estimates that there are 254 million potential U.S. viewers age 2 and older. Viewership is listed here in millions. Net- View- Net- View- Net- ViewProgram work ers Program work ers Program work ers 1. ER NBC 42.71 53. Fired Up NBC 12.33 111. Alright Already WB 2.94 54. Jenny NBC 12.09 112. Head Over Heels UPN 2.92 2. Seinfeld NBC 37.78 55. Ellen ABC 11.99 113. Nick Freno: Licensed Teacher WB 2.69 3. Veronica's Closet NBC 35.07 56. The Practice (Tue.) ABC 11.92 114. Unhappily Ever After WB 2.59 57. PrimeTime Live ABC 11.60 4. Friends NBC 29.43 58. "Just Cause" NBC 11.47 5. Home Improvement ABC 26.06 60. 59. The Beverly X-Files Hills, 90210 FOX FOX 11.28 11.45 Network Averages 6. Union Square NBC 25.55 61. Men Behaving Badly NBC 11.23 7. Mad About You NBC 24.63 62. Cybill CBS 11.12 Here is the number of viewers that each 63. Party of Five FOX 10.91 network averaged per hour of prime time, 8. Touched by an Angel CBS 22.97 64. Dateline NBC (Sun.) NBC 10.75 for last week and for the season. 9. Frasier NBC 21.54 65. Melrose Place FOX 10.16 66. 20/20 (Thur.) ABC 9.95 10. Mon. Night Football ABC 20.96 67. The Tony Danza Show NBC 9.92 Last Week 11. Home Improvement (8:30 p.m.) ABC 20.70 68. Millennium FOX 9.87 "*CMA Awards"* CBS 20.70 69. World's Funniest! FOX 9.52 NBC... . . . . . 16.52 Million 13. "Barbara Mandrell"* CBS 19.90 70. Step by Step CBS 9.26 CBS . . . . . . . . . ... . . . . 15.29 14. Dateline NBC (Tue.) NBC 18.04 71. 48 Hours CBS 8.92 ABC . . . . . . 13.05 15. Caroline in the City NBC 17.98 72. Cops (8:30 p.m.) FOX 8.77 73. "Drop Zone" NBC 8.74 . ... . ... .......... FOX 9.29 16. Law & Order NBC 17.58 17. 60 Minutes CBS 17.47 74. The Practice ABC 8.73 UPN . . . . .. . . . . . . . 4.36 18. Just Shoot Me NBC 17.35 75. The Gregory Hines Show CBS 8.66 WB... . . . . . . . . . . . . . . . . .. 3.92 19. Hiller and Diller ABC 17.29 76. Ally McBeal FOX 8.35 20. Promised Land CBS 16.97 77. C-16 ABC 8.29 Season to Date 21. NewsRadio NBC 16.69 78. The Visitor FOX 8.28 22. Brooklyn South CBS 16.67 79. 413 Hope St. FOX 8.12 23. Wonderful World of Disney ABC 16.42 80. Family Matters CBS 8.07 . . . . . . NBC . 16.52 Million 24. 3rd Rock From the Sun NBC 16.37 81. America's Most Wanted FOX 7.82 CBS .... . . . . 15.29 25. Dharma and Greg ABC 16.09 82. Meego CBS 7.81 ABC . . ... . 13.05 26. King of the Hill FOX 15.81 Cops FOX 7.74 FOX .... . . . . .. 9.29 83. 27. "NFL Monday Showcase" ABC 15.58 85. Total Between Security Brothers FOX ABC 7.72 7.65 UPN . 84. . . . . . . . . . . . . 4.36 28. Early Edition CBS 15.52 29. Walker, Texas Ranger CBS 15.49 86. Living Single FOX 7.61 WB... . . . . .. 3.92 30. The Drew Carey Show ABC 15.20 87. Timecop ABC 7.60 31. "Cloned" NBC 15.13 88. 89. Built Cracker to Last NBC ABC 6.60 7.48 Southland Viewing 32. Diagnosis Murder CBS 15.11 33. The FOX 14.86 90. "Sonora: A Violent Eden" NBC 6.49 Simpsons 34. Cosby CBS 14.40 91. Star Trek: Voyager UPN 6.45 Here are Nielsen's Top 10 prime-time 35. Dateline NBC (Mon.) NBC 14.36 92. Nothing Sacred ABC 6.10 programs in the Los Angeles area during 36. 20/20 ABC 14.08 Chariots" FOX 5.45 the same week. The rankings are based on 93. "Steel 37. The Drew Carey Show (Tue.) ABC 13.91 95. The Wayans Harvey Bros. WB 4.91 the number of households watching. 94. The Steve Show WB 5.14 38. The Naked Truth NBC 13.78 39. You Wish ABC 13.54 96. 7th Heaven WB 4.77 Sta- House40. Dateline NBC NBC 13.49 97. The Sentinel UPN 4.65 Program tion holds (Fri.) 98. Clueless ABC 4.43 41. Teen Angel ABC 13.34 99. Buffy, the Vampire Slayer WB 4.42 1. ER KNBC 1,438,250 "Two Came Back" ABC 13.28 100. Smart Guy WB 4.40 2. Seinfeld KNBC 1,260,322 42. 43. Suddenly Susan NBC 13.02 Moesha UPN 4.40 3. Friends KNBC 1,131,819 44. Dr. Quinn, Medicine Woman CBS 12.94 102. Sister, Sister WB 4.28 4. Veronica's Closet KNBC 1,072,509 45. Dellaventura CBS 12.75 103. Melcolm & Eddie UPN 4.09 5. Union Square KNBC 944,006 46. Nash Bridges CBS 12.66 104. In the House UPN 3.82 6. Mad About You KNBC 894,582 47. Sabrina, the Teenage Witch ABC 12.64 105. Good News UPN 3.75 7. Home Improvement KABC 815,503 Everybody Loves Raymond CBS 12.64 106. Sparks UPN 3.63 8. Frasier KNBC 810,560 49. JAG CBS 12.42 107. Tom Show WB 3.35 9. Law & Order KNBC 775,963 50. George & Leo CBS 12.41 108. The Parent 'Hood WB 3.12 10. Home Improvement (Tue.) KABC 696,884 51. Michael Hayes CBS 12.37 109. The Jamie Foxx Show WB 3.10 Just Shoot Me KNBC 696,884 52. Spin City ABC 12.35 110. Hitz UPN 3.07 60 Minutes KCBS 696,884