Today came word that NBC is refocusing its 8 p.m. programming strategy to emphasize less-expensive reality and game shows instead of scripted series. With Wednesday’s new comedies struggling, they could become an early casualty of that plan.

Last night the second episodes of “30 Rock” and “Twenty Good Years” both fell from their already-low premieres, down a combined 19 percent in the 8 p.m. hour, according to Nielsen overnights.

“Rock” averaged a 2.3 adults 18-49 rating, down 21 percent from last week’s 2.9, while “Twenty” dipped even lower at 8:30 p.m., down 16 percent from a 2.5 last week to a 2.1.

They finished fifth in the timeslot, behind the CW’s “America’s Next Top Model” and just 0.2 ahead of Univision’s “La Fea Mas Bella.”

The two shows combined averaged just 5.5 million total viewers, 400,000 more than “Model.”

NBC may well yank the shows, one of which, “Twenty,” was eviscerated by critics, after yesterday’s results. It seems doubtful either show will last until November sweeps. NBC ordered 10 more scripts of promising new game show “1 vs 100” yesterday, and plugging that show into the slot would fit with its new 8 p.m. strategy.

Last night also saw “Criminal Minds,” CBS’s growing 9 p.m. drama, finish ahead of ABC’s “Lost” for the first time ever in total viewers, though just by a smidge, about 30,000 viewers. That could well change when final ratings are released later today.

According to overnights, “Minds” averaged 16.1 million viewers to “Lost’s” 16.07 million. Last week “Lost” led by 160,000. Last season, “Minds’” first, the closest it came was 3.5 million.

But “Lost” was still a full two points ahead among 18-49s, with a 6.5 to “Minds’” 4.5.

ABC won the night with a 4.9 average rating and 12 share in 18-49s, followed by CBS at 4.2/11, Fox’s National League Championship Series at 3.2/8, NBC at 2.6/7, the CW at 1.9/5, and Univision at 1.6/4.

As a reminder, ratings for live sporting events like the NLCS are approximate as fast nationals measure timeslot and not program data. Fox’s performance will be clearer when final ratings are issued later today.

At 8 p.m., ABC’s “Dancing with the Stars” led at 4.9, followed by CBS’s “Jericho” at 3.1, Fox’s NLCS and CW’s “Model” at 2.5, NBC’s “Rock” and “Twenty” at 2.2, and Univision’s “Fea” at 1.9.

At 9 p.m., “Lost” led with 6.5, followed by “Minds” at 4.5, Fox’s NLCS at 3.3, NBC’s “The Biggest Loser” at 3.1, Univision’s “Mundo de Fieras” at 1.6, and CW’s “One Tree Hill” at 1.3.

At 10 p.m., CBS’s “CSI: NY” led at 5.0, followed by Fox’s NLCS at 3.8 and ABC’s “The Nine” at 3.2, even to last week and seeing slightly less erosion in its second half hour. NBC’s “Dateline” was fourth at 2.6 and Univision’s “Don Francisco Presenta” fifth at 1.2.

Among households, ABC led with 9.4/15, followed by CBS at 9.2/14, Fox at 7.2/11, NBC at 4.6/7, the CW at 2.7/4, and Univision at 1.9/3.