The eight remaining sewers return to the sewing room for lingerie and sleepwear week. The garments might look luxurious, but working with the slippery and delicate fabrics is hugely challenging.To test the sewers' handling skills, judges Patrick Grant and Esme Young kick off the pattern challenge with a boned basque. The task requires sewing together small pattern pieces for a precise fit and creating a tricky hook and eye fastening. Next, in the transformation challenge, the sewers transform pajamas and nightwear into summer dresses.Finally, the models are back to be fitted for two-piece female sleep sets, each of which has to incorporate lace somewhere in the design. These must fit comfortably, and the luxurious fabrics must be finished precisely and expertly. Who will have a dream of a week and win garment of the week, and who will have a nightmare, becoming the fifth sewer to leave the Great British Sewing Bee?