Monday Results:

NBC tied for the nightlong win in adults 18-49 among the Big 4, as "American Ninja Warrior" matched its second-best rating in two years and "Running Wild with Bear Grylls" retained 93% of the prior Monday's premiere rating.

· "Running Wild with Bear Grylls" (1.3 rating, 5 share in 18-49, 4.0 million viewers overall from 8-9 p.m. ET) retained 93% of last week's debut 1.4 rating in 18-49 and 91% of last week's 4.4 million viewers overall. The 1.3 rating tied for the best week-two rating among the six new reality shows on the Big 4 so far this summer that have run at least two weeks (tied with NBC's "Food Fighters"). In the time period, "Running Wild" tied for #2 among ABC, CBS, NBC and Fox in adults 18-49 and finished #2 outright among those nets in adults 25-54

· "American Ninja Warrior" (1.9/6 in 18-49, 5.6 million viewers overall from 9-11 p.m. ET) tied its second-best 18-49 rating in more than two years (since the 2012 season finale on July 23, 2012, trailing over that span only last week's 2.0). "Ninja Warrior" finished just a tenth of a point behind Fox's "MasterChef" for #1 rating of the night in 18-49 (1.9 vs. 2.0). "American Ninja Warrior" won the two-hour time period among the Big 4 in all key demos (adults, men and women 18-34, 18-49 and 25-54, plus total viewers).

· From its first hour to its second, "Ninja Warrior" grew by +17% in adults 18-49 (to a 2.1 from a 1.8) and was up +25% in adults 25-54 (2.5 vs. 2.0).

· The 1.9 rating in 18-49 is up +36% versus an 8-9 p.m. telecast on the same night last year (1.4 on Aug. 5, 2013). In total viewers, "Ninja Warrior" grew versus that year-ago telecast by +11% (5.555 million vs. 4.989 million).

In Late-Night Metered Markets Monday Night:

· In Nielsen's 56 metered markets, household results were: "The Tonight Show Starring Jimmy Fallon," 2.6/7; CBS's "Late Show with David Letterman," 1.6/4 with an encore; and ABC's "Jimmy Kimmel Live," 1.9/5.

· In the 25 markets with Local People Meters, adult 18-49 results were: "The Tonight Show Starring Jimmy Fallon," 1.1/5; "Late Show," 0.3/1 with an encore; and "Jimmy Kimmel Live," 0.6/3.

· From 12:35-1:05 a.m. ET, ABC's "Nightline" averaged a 1.1/4 in metered-market households and a 0.3/2 in 18-49 in the Local People Meters.

· From 12:35-1:35 a.m. ET, "Late Night with Seth Meyers" (1.2/4 in metered-market households) beat CBS's "Late Late Show with Craig Ferguson" (0.8/3). In the 25 markets with Local People Meters, "Late Night" (0.4/3 in 18-49) topped "Late Late Show" (0.2/2).

· At 1:35 a.m., "Last Call with Carson Daly" averaged a 0.7/3 in metered-market households with an encore and a 0.2/2 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. Season figures are averages of "live plus seven day" data except for the two most recent weeks, which are "live plus same day."