SERIES PREMIERE: Morgan Spurlock’s latest nonfiction series benefits greatly from its laser-like focus. The star of Super Size Me devotes his new show to a modern examination of the seven deadly sins, and begins with his personal specialty: gluttony. In one lengthy segment, he profiles the Las Vegas restaurant called the Heart Attack Grill, which features quarter-pound “Bypass Burgers” grilled in lard and covered with cheese, chili and bacon (the quadruple Bypass that’s pictured, we learn, clocks in at 9,983 calories). The guy who runs it is a former fitness trainer, and argues that his theme restaurant, with its public weigh-in stations and outrageous excess, actually works as an “obesity intervention” wake-up call. Sure. Then there’s a visit with Nicole James, otherwise known as Darling Nikki, whose goal is to be “the fattest entertainer in the world,” and who weighs in, when Spurlock’s show finds her, at 716 pounds. Then there’s a capper: a visit with the makers of “plus-size” caskets. Just in case you missed Spurlock’s points about gluttony up to that point…