The Great British Bake Off - Season 5 Episode 10 -

The three finalists face a Signature Challenge in which they have just three hours to prove they have mastered a pastry technique that usually takes a whole day. They then have to tackle a Technical Challenge without the aid of a recipe, before rustling up a Showstopper that turns sponge, caramel, choux pastry and petits fours into a winning combination.