Curtis Stone was back from yesterday’s service challenge for the contestants who won his service challenge yesterday. They called it Curtis Stone Immunity Challenge - Ingredients or Time - Alvin, John, Mindy, Julie, Sarah, Aldo, Michael, Sashi, Christina and Tommy had up to one hour to cook a dish using up to 10 sets of ingredients, with each set becoming available every three minutes. They also had to incorporate Curtis' chosen ingredient, apples.