• by Wayne Friedman , March 21, 2011

NBC hasn't had much luck in the regular season for the last few years. But it has had decent success in the summer.

With that in mind, the network will look to build on its top-rated "America's Got Talent," which is going into its sixth season. NBC will offer up a mix of returning summer reality efforts, new unscripted shows and some fresh episodes of existing scripted fare.

The twice-weekly "America's Got Talent" will start Tuesday, May 31 at 9 p.m., with a two-hour broadcast, and then go into a one-hour time frame June 7 through June 28. It will expand back to two hours at 9 p.m. on Tuesday, July 5 until September 6. For its second night of the week, "Talent" will debut its Wednesday run on June 1 at 9 p.m. and continues through September 7.

The Tuesday "Talent" edition averages a 3.5 rating/10 share in adults 18-49 and 12.2 million viewers; Wednesday's "Talent" averages a 3.4/ 10 in 18-49 and 12.6 million viewers. "America's Got Talent" was the No. 1 summer series in total viewers for each of its five seasons.

Comedian Cedric "The Entertainer" is hosting the new reality show "It's Worth What?" "Worth" is a game show where contestants look for hidden gems found in one's attic, then are taken through a series of challenges that escalate in level of difficulty, as they guess the item's price. Another new game show -- "Still Standing," based on the hit Israeli series of the same title -- offers contestants the chance to win by out-guessing 10 opponents in 10 fast-paced and dramatic trivia battles. NBC says the days and times for these game shows are TBD.

In its second season, "The Marriage Ref" from Jerry Seinfeld begins Sunday, June 26, at 10 p.m. New for this season, couples will appear in-studio and face a panel of celebrities and comedians who decide which spouse is right.

NBC's highly touted answer to "American Idol" is "The Voice" from Mark Burnett and Warner Horizon Television, which begins Tuesday, April 26 at 9 p.m. and continues with new episodes through the end of June.

"Love in the Wild" features 10 single men and 10 single women, experiencing remote jungle challenges and experiences -- all in the hope of finding love. During an elimination, couples will decide to stay with their current partner -- or not.

Original episodes of "Law & Order: Los Angeles" will continue on Mondays at 10 p.m.; NBC will present the final season of "Law & Order: Criminal Intent" (which has been on USA Network) on Monday, May 30 at 9 p.m. Another series concluding this summer is "Friday Night Lights," which airs Fridays at 8 p.m.