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
Carry On Christmas Specials Christmas special, "Carry On Christmas". Talbot Rothwell made a return as the writer, as did Sid James. This was the only special to have a modern-day setting, featuring Sid James as a department store Father Christmas, although it did feature historical sketches. It would be ten years before the next Christmas special. "Carry On Laughing's Christmas Classics" saw Kenneth Williams and Barbara Windsor introduce some of the funniest moments from the later Carry On films, in a format very similar to the film "That's Carry On!". In 2005, the first four specials were released on DVD, featuring interviews with film