In a feast of science and gastronomy, physicist and food fanatic Peter Barhamjoins forces with experimental chef Heston Blumenthal to reveal the science of cooking. The Dessert
This week they reveal how to make the impossible - a fresh pineapple jelly- with a little scientific ingenuity. With the help of guests they explore the importance of shocks and surprises in cooking. Producer Amanda Hargreaves. Music Tom Bancroft