QI XL

 QI XL is the extended, 45 minute version of QI, first introduced for Series F episode "Flotsam and Jetsam". It features a small amount of extra content not seen in the half hour version of each episode. It still covers very little of the original three hour filming of the show.

XL episodes will show 'XL' at the end of the title sequence to differentiate between the two versions of the show.