
I have just noticed that the extended QI XL has a different season number than its corresponding QI.
As a reminder QI is a BBC1 quiz show which runs for 30 mins, QI XL is a longer edit of the show which runs for 45 mins. An extended version if you will.
At the moment season M is airing and is listed under QI as season 13 (M is the 13th letter of the alphabet) but under QI XL as season 8. This is probably because the BBC didn't start airing the extended versions until season 6. However, it is quite confusing for anyone looking at them as it appears that the QI XL broadcasts are several years older than the QI broadcasts.
I believe that whilst they should remain as two shows the seasons/episodes should match up i.e. QI XL s13e14 (Messy) is the extended version of QI s13e14 (Messy).