With both Sarah-Jane and Ryan (the obvious choices, John and James are totty) eliminated last week, the quarter-final sees remaining amateur bakers Brendan, Cathryn, Danny, James and John tackle biscuit-based challenges. Their first task involves making a large batch of crispbreads - each of which must come up to Mary Berry and Paul Hollywood's exacting standards - before the technical challenge, in which they battle time and temperature to create a set of six chocolate teacakes. The last round sees the hopefuls baking and assembling a gingerbread house, before Mel Giedroyc and Sue Perkins reveal who has qualified for the semi-final - and who is going home. Interested in stiff upper lips? Ian Hislop is chronicling a history of them at 9.00pm.