Cake Week sees the bakers take on a fruity challenge. Prue sets her first technical - a kids' party favourite. Plus, the trickiest showstopper ever set in the first week of Bake Off: an illusion cake.

It's week two, and the sandwich biscuit signature challenge sees bakers trying to blend biscuit and filling. There's a technical task set by Paul Hollywood that no one has tried before. And a final showstopper challenge that takes the biscuit and is literally game changing. Paul and Prue Leith cast a critical eye over the contestants' efforts, while new hosts Sandi Toksvig and Noel Fielding settle into their roles. As ever, it remains to be seen which of the unlucky bakers will be shown the door.

It's Bread Week and the ten remaining bakers have a lot to prove to Paul Hollywood and Prue Leith. This time they've been set three tough challenges: a teacake signature, where they must rise to the challenge; a two-tiered technical that's back to basics; and the most ambitious sculpture showstopper ever set in Bread Week. Only one can claim star baker; while another will leave the tent for good.

Nine bakers remain and for the first time it's caramel week. Prue Leith and Paul Hollywood have set the contestants three sticky challenges - a super sweet signature with a rich teatime favourite, a double Dutch technical, and a caramel showstopper. The three tasks will result in one star baker, while another will leave the tent for good. Sandi Toksvig and Noel Fielding lend a hand with pep talks and shoulders to cry on.

Prue and Paul are seeking perfection in pudding week, with a staggering technical challenge and a multi-layered showstopper that's not to be trifled with.

The bakers face a tough triple challenge including an ambitious traditional pie.

The bakers face a Sicilian signature, a deceptively tricky technical, and a fiddly showstopper in the hottest temperatures ever recorded in the tent.

The remaining five bakers step back in time for Forgotten Bakes Week, facing the test of baking with unfamiliar recipes, with places in the semi-final at stake. They start with a sweet and savoury signature challenge, before Prue Leith sets a boozy technical and, for their final challenge, the bakers must produce an elaborate sponge showstopper that once graced the dining tables of high society. Sandi Toksvig and Noel Fielding are on hand to help the bakers calm their nerves.

It's the semi-final, and the four remaining bakers must set to work on producing 24 exquisite choux buns. Prue Leith has set a complex technical for her first semi-final that leaves everyone stumped. And there's a meringue sculpture showstopper where the bakers mustn't crack under pressure. Noel Fielding and Sandi Toksvig present, while Paul Hollywood passes judgement alongside Prue.

Twelve bakers started, just three remain. Who will succeed with the demanding final challenges, including a high-end patisserie showstopper, to be crowned winner of The Great British Bake Off 2017?

Sandi Toksvig and Noel Fielding welcome 12 contestants to the tent, where judges Paul Hollywood and Prue Leith oversee them in three challenges. This year, the competition kicks off with Biscuit Week, and the bakers are challenged to make signature biscuits that will say something both about them and a place in the British Isles, before tackling one of Paul's childhood favourites in the Technical. Finally, the bakers are tasked to make a 3D biscuit portrait in their first Showstopper.

It’s week two and the remaining 11 bakers face Cake Week – kicking off with a crowd-pleasing signature challenge. Next, the bakers face Prue Leith’s first technical, a complicated cake with a very unusual ingredient. Finally, an ambitious chocolate-collared showstopper turns up the heat in the tent. Who will rise to the various tasks – and who will melt under the pressure? Sandi Toksvig and Noel Fielding present, while series regular Paul Hollywood and Prue pass judgement before another baker leaves the contest.

It’s Bread Week, and the ten remaining bakers have a lot to prove with three tough challenges set by judges Paul Hollywood and Prue Leith. There is a teatime fruity favourite Signature; a deceptively simple time-test of a Technical with an international flavour; and an ambitious Showstopper that’s the largest bread sculpture challenge ever set in the tent. Only one can claim Star Baker, while one of them will leave the tent for good.

It is Dessert Week and judges have set three sticky challengers to test the remaining nine bakers. They must create a cracking meringue Signature, a wobbly Technical and a complex chocolate showstopper that promises to reveal all.

It's Spice Week, and Paul Hollywood and Prue Leith task contestants with a teatime favourite Signature. The Technical means the bakers are tested with a tricky Arabian pastry. And, finally, they take on a fiddly Showstopper that promises to be anything but light work.

It is Pastry Week, and Paul and Prue are looking perfection - with savoury and sweet samosas, a classic French technical, and for the final challenge, a daunting majesticpie fit for a banquet.

It is a Bake Off first with Vegan Week. Prue and Paul have set three very different challenges to test the remaining bakers including savoury pastry signature without butter, a cracking technical and a risky but spectacular showstopper.

Volkommen to Danish Week with a bread signature requiring style and substance, a spherical technical and an elaborate pastry showstopper fit for a Danish birthday party and everyone is out to impress.

In the semi-final the four remaining bakers are all desperate to claim their place in the final showdown; the remaining bakers are just three patisserie challenges away from the biggest day of their baking lives.

Three bakers remain but only one can be crowned winner; Paul Hollywood and Prue Leith set three challenges that will test every aspect of the bakers' skills.

The series gets underway with cake week - during which two of the bakers will be sent home. The first stage of the challenge features a fruit cake, while the technical is a retro classic that requires intricate decoration. Finally, for the showstopper, the contestants must create the birthday cake they wish they had received as a child.

It's crunch time with Biscuit Week, starting off with a luxurious chocolate coated signature bake, then a snack with family significance for Paul and an eye-catching showstopper.

The bakers tackle a signature bake designed to be shared; a deceptively simple summer staple in the Technical; and an ambitious Showstopper.

Prue and Paul set some tricky challenges for the remaining bakers, including a Technical that dates back to Henry VIII and a Showstopper that's usually found at Indian weddings.

The challenges inspired by the roaring twenties include a slapstick Signature and a tiered Showstopper special.