Friday Primetime Results:

* From 9-10 p.m. ET, "Grimm" (1.6/5 in 18-49, 5.0 million viewers overall) captured the #1 rating of the night for a scripted program on ABC, CBS, NBC and Fox in 18-49. "Grimm" built on its lead-in last night by 129 percent in 18-49 rating and 130 percent in total viewers.

* Keep in mind that last season, "Grimm" originals added an average 69 percent to these next-day "live plus same day" 18-49 ratings when Nielsen issued "live plus seven day" results.

* At 10 p.m. ET, "Dateline NBC" (1.2/4 in 18-49, 4.5 million viewers overall) grew from its first half-hour to its second by 8 percent in adults 18-49 (to a 1.3 rating from a 1.2), 6 percent in adults 25-54 (1.7 vs. 1.6) and 7 percent in total viewers (4.7 million vs. 4.4 million).

* At 8 p.m. ET, a rebroadcast of "Go On" (0.7/3 in 18-49, 2.6 million viewers overall) grew versus one week ago by 17 percent in 18-49 rating (to a 0.7 from a 0.6) and by 9 percent in total viewers (2.604 million vs. 2.391 million). At 8:30 p.m. ET, an encore telecast of "Guys With Kids" (0.7/2 in 18-49, 2.2 million viewers overall) maintained its 18-49 lead-in.

In late-night metered-market households 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," 2.6/6; and ABC's combo of "Nightline," 3.3/8; and "Jimmy Kimmel Live," 1.8/5.

* In the 25 markets with Local People Meters, adult 18-49 results were: "The Tonight Show with Jay Leno," 0.8/4; "Late Show," 0.6/3; "Nightline," 1.2/5; and "Jimmy Kimmel Live," 0.7/4.

* At 12:35 a.m., "Late Night with Jimmy Fallon" (1.5/5 in metered-market households) beat CBS's "Late Late Show with Craig Ferguson" (1.3/4). In the 25 markets with Local People Meters, "Late Night" (0.6/3 in 18-49) beat "Late Late Show" (0.4/2).

* At 1:35 a.m., "Last Call with Carson Daly" averaged a 1.0/4 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.