This is a list of episodes of QI, the BBC comedy panel game television show hosted by Stephen Fry.
The first series started on 11 September 2003. Although not mentioned at the time, all of the questions (with the exception of the final "general ignorance" round) were on subjects beginning with "a" (such as "arthropods", "Alans" and "astronomy"). The following four series continued the theme: the second series' subjects all began with "b", and so on.
The dates in the lists are those of the BBC Two broadcasts. The episodes were also broadcast on BBC Four, generally a week earlier (as soon as one episode finished on BBC Two, the next was shown on BBC Four). Aside from Alan Davies and not adding clip shows, there are six guests that have appeared in ten or more episodes (out of 61), they are Jo Brand (18), Rich Hall (16), Phill Jupitus (16), Bill Bailey (15), Sean Lock (14) and Clive Anderson (10). Excluding the Pilot there have been a total of 51 different guest panellists in the four series to date. The fifth series began to air on BBC Two on 21 September 2007.