As the summer television season nears a close, three high-profile unscripted skeins — NBC’s “The Restaurant,” CBS’ “The Amazing Race” and Fox’s “American Juniors” — ended their runs last week and await word regarding their futures.

“The Restaurant” again won its Sunday hour in key demos and is a strong candidate to return in some form (Daily Variety, Aug. 22). The Emmy-nommed “Amazing Race” wrapped its fourth edition Thursday with hearty but unspectacular numbers. The Eye has yet to greenlight a fifth season.

Future looks bleakest for “American Juniors,” which ended with a whimper last Tuesday. The “American Idol” spinoff is penciled in on the net’s postbaseball fall sked, but nobody would be surprised if that doesn’t materialize.

NBC, meanwhile, stretched its adults 18-49 winning streak to 13 weeks, averaging a 2.9 rating/9 share for the Aug. 18-24 frame, according to Nielsen. CBS, second in 18-49 (2.7/9), inched past NBC in adults 25-54 for its first outright victory of the summer in the demo (3.4/10 vs. 3.3/9) and dominated in total viewers (8.7 million).

Fox (2.6/8) and ABC (2.3/7), which both got significant boosts from preseason football, ran third and fourth in 18-49, respectively. The Murdoch net continues to roll among adults 18-34 (2.9/11), winning for the 30th time in the last 33 weeks.

A repeat of CBS drama “CSI” was the week’s No. 1 program in adults 18-49 (5.0/14) and total viewers (14.64 million). The Eye also got a nice finishing kick Sunday from firstrun David James Elliott movie “Code 11-14” (2.9/8 in 18-49, 11.85m), which ranks as the most-watched pic on any net this summer.

Net’s “Big Brother 4” keeps on rolling, again winning all three of its hours in 18-49, including a special Saturday seg (3.0/11).

As for “Amazing Race,” its finale won in adults 25-54 (4.5/13) and total viewers (9.88m) and was second to repeat NBC comedies in adults 18-49 (3.7/12). It was down from the two-hour finale for “Amazing Race 3” in December (4.7/13 in A18-49).

At NBC, whose 18-49 winning streak is the seventh longest on record, “For Love or Money 2” (4.5/12 in 18-49, 9.73m) and a special Thursday episode of Bravo skein “Queer Eye for the Straight Guy” (4.2/13, 8.02m) both hit series highs last week. And “Restaurant” (3.7/11) approached a high with its summer finale.

NBC’s Thursday lineup seemed to be energized by “Queer Eye,” as both “Friends” (4.3/15) and “Will & Grace” (4.2/12) rallied to their best 18-49 scores in more than two months.

Overall, NBC claimed six of the week’s top seven programs in 18-49.

Fox highlights included another slot victory for Tuesday drama “The OC” (3.5/10 in 18-49) and best-since-preem results for Wednesday’s “Paradise Hotel” (3.6/11), which pulled closer to “Big Brother 4” (3.9/12).

A marquee NFL preseason contest (if there is such a thing) between the Dallas Cowboys and Pittsburgh Steelers gave the net its best Thursday 18-49 rating (3.2/10) since April and its largest overall aud on the night (8.15 million) since February.

On the down side, “American Juniors” exited very quietly Tuesday — a distant fourth-place finish in its slot (1.8/6 in 18-49) and well less than half of its premiere rating in June (4.8/15).

ABC sputtered to fourth-place finishes in 18-34, 18-49 and 25-54 despite its best Monday showing of the season, courtesy of preseason NFL action (3.9/12 in 18-49, 10.42m for St. Louis Rams-Tampa Bay Buccaneers).

It was another quiet week at UPN and the WB, although the latter’s laffer “Reba” looked good in its new earlier timeslot: An hourlong seg from 8 to 9 brought the net its largest overall aud in the hour (3.43m) since February.

Among ad-supported cablers, Bravo’s “Queer Eye” was the No. 1 entertainment series in 18-49 (1.7/5), followed by FX’s timeslot rival “Nip/Tuck” (1.4/4).

TNT, with a nice boost from a Winston Cup auto race Saturday, easily led the week in 18-49 (1.0/3), 25-54 (1.2/3) and total viewers (2.86m).

VH1, Bravo and SoapNet all more than doubled their 18-49 delivery compared with the same frame last year.