The chefs explore the wonders of molecular gastronomy in the third Alton's Challenge battle. Making a powder from a fat and clearing up the problem with transparent ravioli are some of the struggles in round one. In the entree round, the chefs get lamb cooked with a modernist method and some new age noodles. Then, a cake that looks and tastes like a drop of water gives the last pair of chefs a perplexing puzzle to solve for dessert.