The second sequence consisted of subjects beginning with "B" and in addition saw the first attempts to concentrate to a specific theme all through one episode, e.g. "Birds" (the over-riding theme did not essentially begin with "B", though the questions all the time contained a component that did). The primary series started on 11 September 2003, and consisted of topics beginning with "A". This development has continued with every subsequent sequence; episodes from previous series had been retroactively given titles. A QI Elves podcast, No Such Factor as a Fish, started on 8 March 2014. The title is taken from an entry into the Oxford Encyclopedia of Underwater Life (although within the opening theme of the first forty one episodes it is incorrectly referenced as the Oxford 'Dictionary' of Underwater Life), which was used on the present.

Series D was the primary to see all the episodes focus upon a single subject or theme, starting with the series letter (e.g. Hazard), and for each to be given an official title connected to the topic/theme. In https://newsperspectivetoday.com/ based behind the scenes collection that adopted the podcasters on their UK tour was launched referred to as 'Behind The Gills'. A video podcast (featuring the perfect moments with some out-takes) was deliberate to accompany Collection E, but this was as a substitute turned right into a set of "Quickies" featured on the QI homepage of the BBC's webpage. In QI, each series takes its theme from a distinct letter of the alphabet, beginning with the letter "A".

The theme song is "Wasps" from the band Emperor Sure, which is based on a truth about bees which was used on QI. They argue that bees as a substitute are primarily recruited by odor. Common elves are Anna Ptaszynski, James Harkin, Dan Schreiber, and Andrew Hunter Murray, with occasional appearances from Alex Bell and Anne Miller. The "elves" devise the questions for the present, and one is on set throughout filming who's in a position to speak with the host during the present to supply and correct data. Schreiber is the host of the present. A Tv present entitled No Such Thing as the Information aired for two seasons in 2016, following an identical format primarily based round information stories and current occasions.