Louise Pentland, Jason Cook, Alistair Appleton, Ben Shires

Another four famous faces risk their reputations on television's toughest quiz. Vlogger Louise Pentland aka sprinkleofglitter, writer and comedian Jason Cook, Escape to the Country presenter Alistair Appleton and CBBC presenter Ben Shires answer questions on the Harry Potter novels, Billy Connolly, 20th century European classical music and Leeds United.