CBS led the TV ratings competition for the second week in a row with strong performances by "Murphy Brown" and "Northern Exposure" and by newcomer "Love and War."

      CBS had a 12.8 average rating for the week of Dec. 14-20, followed by ABC with 11.6 and NBC with 9.9, according to figures released by the A.C. Nielsen Co. Each ratings point represents 931,000 homes.A No. 1 showing by ABC's "Roseanne" helped "The Jackie Thomas Show" bounce from 18th place last week - when it followed a repeat "Roseanne" episode - up to fourth place.

      CBS' newsmagazine "60 Minutes" was the No. 2-ranked show, followed by the ABC comedy "Home Improvement."

      "Murphy Brown" and "Love and War," both Diane English-created sitcoms, ranked fifth and eighth.

      ABC's "Coach," NBC's "Cheers" and "Northern Exposure" on CBS grabbed the sixth, seventh and ninth spots.

      Tied for tenth place were "Full House" on ABC and NBC's "Wings."

      Holiday-themed specials were squeezed out of the top ranks. A CBS salute to the old Ed Sullivan variety show, "Holiday Greetings from Ed Sullivan," finished strongest at No. 16.

      In the network news contest, ABC was first with a 10.7 average rating, followed by CBS with 9.9 and NBC with 9.3.

      Here are the Top 10 shows, their network and rating: "Roseanne," ABC, 22.5; "60 Minutes," CBS, 19.7; "Home Improvement," ABC, 18.8; "The Jackie Thomas Show," ABC, 18.6; "Murphy Brown," CBS, 18.0; "Coach," ABC, 17.2; "Cheers," NBC, 16.3; "Love and War," CBS, 16.1; "Northern Exposure," CBS, 16.0; "Full House," ABC, 15.6; "Wings," NBC, 15.6.