Three primetime World Series telecasts on CBS handcuffed the latenight competition in Nielsen daytime and fringe ratings for Oct. 18-22, while “Late Show With David Letterman” remained the big bat in the daypart — winning its eighth straight week since signing on.

Fox Broadcasting Co., meanwhile, actually improved its performance to the tune of 35% with reruns of “In Living Color,” which posted a 3.1 rating/7 share, compared to a 2.3/5 for the final week of “The Chevy Chase Show.”

“Late Show,” for the two nights not affected by baseball overruns, posted a 5 .4/18 overall and 6.1/17 in its first half-hour. “Nightline” (excluding Monday) posted a 5.0/13, while a repeat week of “The Tonight Show With Jay Leno” turned in a five-night 3.7/11 and 4.5/12 average from 11:30 p.m.-midnight.

Special editions of “Late Show,” delayed by baseball, averaged 4/20. NBC’s “Late Night With Conan O’Brien” turned in a rather sleepy 1.6/8.

Elsewhere, CBS ran its daytime win string to 242 weeks, averaging a 6.1/23 in households vs. ABC’s 4.7/18 and a 3.1/12 for NBC. CBS also took a rare win among women 18-49 with a 3.6 rating to ABC’s 3.5 and NBC’s 2.1.

The Alphabet web is hoping to pick up a boost in both demos and households from the return of its “Luke & Laura” pairing on “General Hospital,” beginning today.

“Good Morning America” (4.4/20), up 8% over the same stretch in fourth quarter ’92, enjoyed a relatively easy win over “Today” (3.9/18), while “CBS This Morning” delivered a 2.9/13. Tallies among adults 18-49 were NBC, 1.8; ABC, 1.7; CBS, 0.9.

Fox Children’s Network flexed its muscles in Saturday morning with another easy win, averaging a 5.8 rating among kids from 8 a.m.-noon compared to a 5 for CBS and ABC’s 4.2 during the same four hours. Household averages were Fox, 3.4/ 13; CBS, 3.0/12; ABC, 2.6/10.