Overview: Grayson and Philippa Perry are joined by comedian and potter Johnny Vegas, who makes an artwork inspired by dreams - the theme of the week. There are special contributions from presenter Konnie Huq and musician Sophie Ellis-Bextor, a look inside the studio of Guyana-born British artist Frank Bowling, and a chat with Mary Stephenson, who paints playful dreamscapes and imaginary worlds. Plus, Grayson and Johnny choose their favourite public submissions of the week.