1988-89
A18-49 W18-49 M18-49
1. NBC 16.0/26 9.6 10.8 8.5
2. ABC 12.9/21 8.2 9.0 7.4
3. CBS 12.6/21 7.0 7.8 6.2

Debuts: Empty Nest, Roseanne, Unsolved Mysteries (although NBC aired few specials season before), Wonder Years

21. Night Court - 16.7
22. Wonder Years - 16.4
23. One of the Boys - 16.3
NBC Sunday Movie - 16.3

Maybe vampirevsrobot has full chart with rating and shares.

Surprised to see ALF in the top 15

It always makes me sad seeing The Jim Henson Hour rank so low in the weekly ratings. The show kept falling every week. After the lowly 7.7/14 rating/share of the first episode, the next three episodes saw what little bottom there was fall out, as it dropped to a 6.2/13, then a 5.8/11, and then a 5.6/10. After the Sunday May 14th episode brought in only a 5.2/11, NBC cancelled the show. Four of the remaining episodes were burned off in July on Sundays, and those episodes respectively brought in ratings of 4.6/10, 3.9/8, 4.0/9, and 4.6/10. Yes, two episodes couldn't even earn a 10 percent audience share.

Didn't Murphy Brown debut that year as well?