Kicking off the series, Jo and her panel of Bake Off fans will give us their take on the 12 brand new bakers and their attempts in cake week. Will they go mad for the bakers' madeira cake? How do they think the dozen coped with their first ever technical bake - Mary's frosted walnut cake? Whose black forest gateau show-stopper stopped the show?

It's biscuit week, so Jo and her guests celebrate all sorts of biscuits in the An Extra Slice studio, tasting audience attempts at cookies and crackers and looking at viewer photos of their bakes from home - the good, the bad and the downright disastrous. Jo and her panel of Bake Off fans give their take on the remaining 11 bakers and their attempts at biscuits. What do the panel think of the bakers' signature biscotti? How do they think the bakers coped with technical challenge number two - Paul Hollywood's arlettes? And which baker's biscuit box most impressed in the showstopper?

It's bread week, so Jo and her guests will be casting their eye over the home-baked breads brought in by the studio audience, as well as looking at viewer photos of their home baking efforts too, be they triumphs or heroic fails. What will the panel make of the bakers' signature quick breads? Whose baguettes were bang-on in the technical challenge? And whose showstopping bread sculpture stood out?

It's desserts week, so Jo and her guests will discuss the remaining nine bakers and their efforts. Whose signature creme brulees had the panel drooling? What did they make of the Spanish windtorte in the technical? Had they even heard of it? And whose tiered baked cheesecake show-stopper impressed them the most? Plus Jo and the panel will be tasting bakes brought in by the studio audience and looking at photos of your creations from home - from perfect puds to disastrous desserts.

Host Jo Brand is joined in the An Extra Slice studio by three celebrity guests giving their take on this week's Bake Off shenanigans. Along with chat and unseen footage from the BBC One show, there is an interview with the latest baker to leave the tent. Jo and her guests also taste bakes brought in by the audience, be they gluten-free, sugar-free or possibly even flavour-free. They also look at photos of viewer bakes from home - the good, the bad and the downright catastrophic. What will the panel think of the bakers' attempts at sugar-free cakes in the tent? Who do they think pulled off the best gluten-free pitta breads? And whose dairy-free ice cream roll had them salivating in the showstopper?

Joining host Jo Brand in the An Extra Slice studio will be three celebrity Bake Off fans eager to chew over the latest goings on in the tent. Jo and her guests will debate which bakers were victorious in Victorian Week. They will be tasting bakes brought in by the studio audience and looking at pictures of viewer bakes from home - from the incredible to the frankly inedible. There will be an interview with the latest baker to leave the tent, as well as unseen footage from the BBC One show. Jo will get the panel's take on the remaining bakers and their Victorian bakes. Who rose to the occasion in the raised game pie signature bake? Which baker served up a faultless tennis cake in the technical? And what will the panel make of this week's charlotte russe showstopper?

Sarah Millican stands in for Jo Brand on An Extra Slice and is joined by Gregg Wallace, Joe Lycett and pastry chef Cherish Finden to dissect this week's events in the tent, with unseen footage from the BBC One show and an interview with the latest baker to leave. They also taste bakes brought in by the studio audience and look at viewer photos of their bakes from home - the delicacies and the calamities. How do the panel think the bakers coped with cream horns in the signature? What did they make of the mokatines technical? Had the panel even heard of the showstopper - religieuse a l'ancienne? And which of the bakers do our panel think will make it through to the end?

Jo Brand is joined by three celebrity Bake Off fans to dissect the penultimate week in the tent, when the bakers tackled chocolate. As well as unseen footage from the BBC One show, Jo and the panel will taste bakes brought in by the studio audience and look at photos of bakes from viewers at home - the stonkers and the stinkers. Jo will interview the last baker to leave before the final. What will the panel think of the bakers' signature chocolate tarts? Who rose to the chocolate souffle technical? Whose show-stopping 3D chocolate centrepiece was the centre of attention? And which baker will the panel tip to be crowned the Great British Bake Off Champion 2015?

It is the final week in the Bake Off tent and just three bakers remain. Who will be crowned this year's winner? Jo Brand hosts An Extra Slice and is joined in studio by Paul Hollywood and Mary Berry to get their take on the nerve-wracking final bakes and how and why they chose their eventual winner. Jo will interview the champion, the two runners-up and will be joined by all of this year's bakers. Plus there's lots of unseen footage from the BBC One show and a look at the best and worst viewer and audience bakes too. With everything to play for, the final three face their last ever signature to create filled iced buns, a final nail-biting technical and a classic British cake in the show-stopper - whose bakes will be deemed worthy of a champion? The Great British Bake Off: An Extra Slice - your final helping of the year.