A pilot episode of QI was produced to test out the show. This pilot has never been broadcast, but we know all about it because it was released as an extra on the first QI DVD.
The first series of QI, which was based around the letter 'A', made its debut on BBC Two in September 2003. The series answered "an avalanche of As", with the panellists being asked about Adams, Alans, Andersons, aquatic animals, astronomy and the antidotes of QI's patron saint - Pliny the Elder.
The fifth series aimed to exterminate the end of 'E' ignorance; engaging with electricity, eating, England, Europe, empires, entertainment and elephants in the process. All the episodes in this series had an 'Elephant in the Room' bonus. Panellists could score 10 points if they spot a reference to an elephant in any of the questions. Series E also saw the introduction of the 'QI Quickie' - originally meant to be a vodcast, each one contains some unbroadcast material.
Here is our guide to Series F of QI, the first series of the show to be broadcast on BBC One. It was also the first series to be given a longer 45 minute extended repeat, titled QI XL.
The seventh series of QI was the first to be extended to 16 episodes long. It covered everything interesting beginning with 'G' - including geography, geometry, genius and Germany. This was the first series to have some episodes broadcast transmitted before the 9pm watershed, and also the first series to feature an episode with more than three guests.
The ninth series includes everything interesting beginning with 'I', including idleness, illness, insects, inventions, intelligence and injustice. This series of QI saw the series return to its original home on BBC Two.
A special documentary episode about the making of QI.
QI. Image shows from L to R: Alan Davies, Jo Brand, Stephen Fry, Liza Tarbuck, Sue Perkins. Copyright: TalkbackThames
QI goes into jubilant double figures (numerically speaking) with its tenth series, jesting over subjects starting with 'J'... such as jungles, jeopardy, journalism, jobs, justice and journeys. This 16-part series features 13 panellists making their debuts, including two from the southern hemisphere who have never appeared on British TV before. This series also includes the first episode in which all three guests are women.
The 11th series of the brainy panel show...
A guide to the latest series. Each episode includes a 'Spend A Penny' bonus, awarded if the guests can spot when a question is related to a lavatory-based theme.
The 13th series of the show, recorded in Spring 2015, sees the programme reach the half way mark in its plan to cover the whole alphabet.
New series, new letter, new host. Sandi Toksvig now navigates QI as it looks at everything interesting beginning with "N".
OMG! Sandi, Alan, and others are opening up to options and opinions beginning with "O".
Pleasing picks of peculiar knowledge as Sandi and Alan get pedantic over the letter "P".
Quite Interesting queues up for questions about "Q".
Right. Time to get real with everything interesting starting with "R". Risky however, as the coronavirus pandemic struck half-way through the series recording, and some episodes were recorded without an audience.
Sandi and Alan return to the studio for Series S - but not the studio audience. As covid-19 is still around, the audience are at home watching virtually on their sofas, settees and seats, as the panel cover the silly, the spooky and the sensational.
Series T (2022 - 2023) New
The twentieth series sees Sandi and Alan tackle topics beginning with "T".