Friday Primetime Results:

* From 8-10 p.m. ET, "Dateline NBC" (1.3/4 in 18-49, 6.7 million viewers overall) ranked #1 in the slot among ABC, CBS, NBC and Fox in total viewers and #2 in adults 18-49 and adults 25-54. For its first hour from 8-9 p.m., "Dateline" was #1 among those networks in 18-49, 25-54 (tie) and total viewers.

* From 10-11 p.m. ET, "Rock Center with Brian Williams" reported a 1.1/3 in 18-49 and 4.9 million viewers overall. Versus its averages on Thursday nights earlier this season, "Rock Center" was up last night by 10 percent in 18-49 rating (1.1 vs. 1.0, L+SD) and up 32 percent in total viewers (4.865 million vs. 3.697 million)

* For the night, NBC ranked #2 among ABC, CBS, NBC and Fox in adults 18-49 and total viewers (pending updates).

In Late-Night Metered Markets Friday night:

* In Nielsen's 56 metered markets, household results were: "The Tonight Show with Jay Leno," 2.8/7; CBS's "Late Show with David Letterman," 2.7/7; and ABC's "Jimmy Kimmel Live," 2.0/5.

* In the 25 markets with Local People Meters, adult 18-49 Wednesday results were: "The Tonight Show with Jay Leno," 0.7/4; "Late Show," 0.6/3; and "Jimmy Kimmel Live," 0.9/4.

* From 12:35-1:05 a.m. ET Wednesday night, ABC's "Nightline" averaged a 1.2/4 in metered-market households and a 0.6/3 in 18-49 in the Local People Meters.

* From 12:35-1:35 a.m. ET, "Late Night with Jimmy Fallon" (1.5/5 in metered-market households) beat CBS's "Late Late Show with Craig Ferguson" (1.2/4). In the 25 markets with Local People Meters, "Late Night" (0.5/3 in 18-49) topped "Late Late Show" (0.3/2).

* At 1:35 a.m., "Last Call with Carson Daly" averaged a 0.9/4 in metered-market households and a 0.3/2 in adults 18-49 in the 25 markets with local people meters.

NOTE: All ratings are "live plus same day" from Nielsen Media Research unless otherwise indicated.