up comic Jerry Seinfeld is headed back to US television with a show about marriage that he says is silly and impossible to explain but aimed at making people laugh. “There is no way here today we are going to be able to explain to you exactly what the show is,” the married star of the hit 1990s show “Seinfeld” told reporters Sunday. “Our entire drive is to try and make you laugh,” he said, describing “The Marriage Ref” as a combination of reality show, game panel and comedy with no big prizes for its feuding contestant couples. “The Marriage Ref” will be given a sneak preview on NBC on Feb. 28 before starting in its regular Sunday night slot on March 14. Seinfeld, 55, who has done little TV since “Seinfeld” ended in 1998, is executive producer and will appear in the series as a celebrity panelist. Actors Alec Baldwin, Tina Fey, Eva Longoria and Larry David are among other celebrities who will make an appearance - not fighting with their spouses but helping to decide which spouse should “win” a spat filmed in their own homes. Stand-up comic Tom Papa will be the “marriage ref.”