The Book of General Ignorance round differs, in particular during the Christmas specials. During the course of the "B" Series special, Fry and Davies swapped places for "General Ignorance", with Fry attempting to answer questions ostensibly written by Davies to stump him. During "D"s Christmas Special, all the "GI" questions revolved around saints. "The Book of General Ignorance" contains a list of 230 questions, most of which previously appeared in episodes of "QI". Each question explains the correct answer, and usually attempts to show why people tend to make the wrong assumptions, or believe certain myths. Each book contains two forewords, one by Fry, the
And Then There Were None a card with the hint: "Six little Indians ...bee stung one and then there were five". In this case, the rhyme refers to "Ten Little Fat Boys". (The film's plot bears no resemblance to Arthur Conan Doyle's original story of the same name.) The author of the movie's screenplay, Robert Florey, "doubted that [Christie] had seen "A Study in Scarlet", but he regarded it as a compliment if it had helped inspire her". "And Then There Were None" has had more adaptations than any other single work by Agatha Christie. It is the isolated location where all the players on