The second episode of “Oprah’s Big Give,” the daytime talk show queen’s new ABC reality series, couldn’t maintain last week’s big ratings.

“Give” averaged a 4.0 adults 18-49 rating last night, according to Nielsen overnights, off 25 percent from week one’s 5.3 average.

The show, in which Oprah Winfrey gives money to contestants to be used to help others, still easily won its timeslot, 25 percent ahead of second-place Fox at 9 p.m. And it maintained 100 percent of 8 p.m. lead-in “Extreme Makeover: Home Edition” in the demo.

The falloff was probably explained by a large amount of sampling in week one, which attracted 15.6 million total viewers, after a media publicity blitz. Some of those viewers did not return, with 11.8 million tuning in last night.

But for strike fodder, ABC could certainly do worse. And “Give” helped propel ABC to a victory at 10 p.m., too, as new reality show “Here Come the Newlyweds” averaged a 3.6 rating, maintaining 90 percent of its lead-in.

The networks have noted going into this week that the weekend's daylight savings time switchover will have a big impact on TV usage levels going forward. They were down across the board during primetime last night.

ABC finished first among viewers 18-49 with a 3.4 average overnight rating and a 9 share. Fox was second at 2.6/7, NBC third at 2.0/5, CBS fourth at 1.9/5, Univision fifth at 1.4/4 and CW sixth at 0.5/1.
 
At 7 p.m. ABC led with a 1.9 for “America’s Funniest Home Videos,” followed by CBS with a 1.8 for “60 Minutes.” NBC was third with a 1.5 for “100 Most Outrageous Moments,” Fox fourth with a 1.3 for repeats of “King of the Hill” and “American Dad,” Univision fifth with a 1.0 for “Hora Pico” and Familia P. Luche” and CW sixth with 0.7 for an “America’s Next Top Model” rerun.
 
ABC was first again at 8 p.m. with a 4.0 for “Home Edition,” with Fox second with a 3.2 average for “The Simpsons” (3.5) and “King of the Hill” (3.0). NBC was third with a 2.6 for another hour of “Outrageous Moments,” CBS fourth with a 2.2 for “Big Brother,” Univision fifth with a 1.3 for the pre-awards show “Noche de Estrellas” and CW sixth with a 0.5 for “Everybody Hates Chris” (0.5) and “Aliens in America” (0.4).
 
At 9 p.m. ABC led again with a 4.0 for “Give,” while Fox remained second with a 3.2 average for a repeat of “Family Guy” and a new “Unhitched” (2.6). NBC and CBS tied for third at 1.8, NBC for a repeat of “Law & Order” and CBS for a repeat of “Cold Case,” with Univision fifth with a 1.6 for its first hour of “Premios Furia Musical 2008” and CW sixth with a 0.4 for repeats of “Girlfriends” and “The Game.”
 
ABC completed the nightly sweep at 10 p.m. with a 3.6 for “Newlyweds,” followed by NBC with a 2.2 for a repeat of “Law & Order: Special Victims Unit.” CBS was third with a 1.9 for “Dexter” and Univision fourth with a 1.7 for the second half of its awards show.
 
Among households, ABC was first for the night with a 6.1 average overnight rating and a 10 share. CBS was second at 5.4/9, NBC third at 4.9/8, Fox fourth at 3.4/6, Univision fifth at 1.6/3 and CW sixth at 0.9/1.