ABC’s “Dr. Ken” held up well in its second week, down a bit from last week but easily topping the premiere of NBC’s own comedy, “Undateable,” which didn’t make much noise with the first of its season-long live episodes.

According to preliminary national estimates from Nielsen, “Dr. Ken” averaged a 1.3 rating/5 share in adults 18-49 and 5.8 million viewers overall in the 8:30 p.m. half-hour, retaining 100% of its lead-in from “Last Man Standing” (1.3/6 in 18-49, 6.3 million viewers overall). “Dr. Ken” was down a tenth from its week-ago preliminary score and 0.2 below its final (1.5). The preliminary week 1 to week 2 retention for the Ken Jeong comedy (93%) tops those of all other new comedies this season, including Fox’s “Grandfathered” (80%) and CBS’ “Life in Pieces” (73%).

“Undateable,” meanwhile drew some of its smallest ratings to date (0.8 rating/3 share in adults 18-49, 2.6 million viewers overall) as it moved to Friday. The show, which premiered in the summer of 2014 and bottomed out there with a 0.6 in the demo, was upgraded to the post-“Voice” timeslot on Tuesdays last spring, where it peaked with a 1.9 for its premiere. The comedy was shot live on both coasts last night, and placed third in 18-49 among the Big Four for its hour. Staring next week, “Undateable” will air half-hour live episodes, followed by new comedy “Truth Be Told” at 8:30.

ABC won the third Friday of the season in 18-49, though its “Shark Tank” (1.5/5 in 18-49, 5.8 million viewers overall) has lost some steam. It was again the night’s top series in 18-49 but was down 0.2 from last week and 0.5 from the same night a year ago.

CBS had a consistently solid night with “The Amazing Race” (1.1/4 in 18-49, 5.9 million viewers overall), “Hawaii Five-0” (1.1/4 in 18-49, 8.9 million viewers overall) and “Blue Bloods” (1.2/4 in 18-49, 10.5 million viewers overall), which swept its hour among the broadcasters at 10. The Eye placed second to ABC for the night in 18-49 as it did a week ago, when it moved ahead in Nielsen’s “live plus-3” estimates.

At CW, the season premiere of “Reign” (0.3/1 in 18-49, 1.0 million viewers overall) was about where it was most of last spring on Thursday. And “America’s Nex Top Model” (0.3/1 in 18-49, 1.0 million viewers overall) was down a tick from last week.

In “L+3” Nielsen numbers for last Monday rounded to the nearest 0.05, NBC’s “Blindspot” padded its same-day 18-49 rating (2.45) by 1.50 to 3.95 while growing in total viewers from 9.06 million to 13.39 million (the biggest lift of the night). The drama, which was picked up for the full season on Friday, was down 0.20 week-to-week in 18-49, but this score still tops all telecasts of every other first-year program this fall, and the 1.50 lift is the second greatest for any rookie program (behind the show’s 1.60 build the previous week).

CBS had good news for its modestly rated new comedy “Life in Pieces,” which held at the previous week’s 18-49 rating (2.45), rising 0.55 from its same-night rating (1.90). Lead-in “The Big Bang Theory” was about at last week’s score (5.50 vs. 5.55).

Fox’s “Minority Report” continued its decline, falling to a 1.00 rating from a 1.25 the previous week; the network announced Friday that the show’s 13-episode order has been reduced to 10. Lead-in “Gotham” (2.35) saw a smaller lift this week and was down from last week’s 2.60 in L+3.