Once again taking over the Bake Off tent, Mary and Paul tackle the signature, technical and show-stopper challenges from the second half of the series.Just as the challenges got harder for the bakers, Mary and Paul must also make their more elaborate bakes, showing us how to achieve the perfect results at home.Mary makes a swirling chocolate and orange tart and the most complicated technical challenge of the series, the Swedish prinsesstarta. Paul dusts off his pastry skills making mini sausage plaits and demystifies the delicious kouign amann, which so baffled the bakers in the tent. Finally, Mary constructs her own version of the two-tiered dobos torte, complete with caramel of all kinds, with hints and tips on how to achieve perfection at home.