Co-hosts Michael Symon and Esther Choi begin the second shift with two chefs in a head-to-head elimination battle that tests simplicity. Their assignment is to turn a basic sandwich plus three ingredients of their choosing into a fancy lunch. After judge Graham Elliot decides which chef will clock out, the 12 remaining chefs must use the simplest of tools -- their palate -- to pass a tricky test that impacts their ability to survive a second elimination challenge. It's only hour four, so the chefs are still running on adrenaline and energy ... for now!