Advent Calendar 11 Dec: QI Christmas Special, Series G

QI, if you have not seen it before, is a "panel quiz", i.e, a show where they get a bunch of witty people together and ask them questions mainly designed to prompt wiseass answers. This one is hosted by Stephen Fry, World's Smartest Comedian. They do a Christmas special every year, as many British programmes do, and for Series G, they decided to invite David Tennant as their special guest. They had not, to this point, had anything even resembling a sane Scotsman on the show -- they ask Ross Noble back a lot -- and so far as I know, they still haven't.