In the final masterclass of the series, Mary and Paul heat up the ovens and get out the mixing bowls one last time to create the signature, technical and showstopper challenges from the last part of the Great British Bake Off. Mary makes a tennis cake based on the 19th-century recipe that was the technical challenge from Victorian week. Paul makes two types of cream horns - the first filled with a mocha creme pat and the rest with a limoncello tutti frutti cream. Mary shows us how to be delicate, precise and perfect with her mokatines, and Paul gets to grips with an epic construction in choux pastry - le religieuse a l'ancienne.