Modern magic! Four new chefs explore the wonders of molecular gastronomy in Alton’s Challenge battle. Making a powder from a fat and clearing up the problem with transparent ravioli are some of the struggles in the appetizer basket. In the entrée round, the chefs get lamb cooked via a modernist method and some new age noodles. And a “cake” that looks like a drop of water -- and tastes like one too -- gives the last pair of chefs a perplexing puzzle to solve for dessert.