Fact Off - The three guests reveal their favourite fact and try to see if it is true. The fact proving segments are narrated by John Sergeant.
In Series 1 and 2, the panellists (excluding the Verifiers) scored the facts.
From Series 3 onwards, an average was taken from the audience.
Fact Finder - Each of the three guests choose an audience member who has a fact which is given to three experts (also known as "The Verifiers" within the show) who reveal if the facts are true or not, as well as score them.
Mack's Fact (Series 1-2) - The guest with the highest score takes part in a fact Mack wants to prove.
Mack's Facts (Series 3 onwards) - Mack gives clues to three facts, and whoever can guess the fact gets a point.
Episodes
46 episodes were produced, with the final episode of each series (the eighth episode) being a best-of compilation. The final episode for series 6 (a best-of compilation) was unaired.
Writing for The Arts Desk, Matthew Wright said of the first episode "With QI's questions about Noam Chomsky substituted for lightweight popular psychology and an investigation into dog urine, there's not enough substance to bear the weight of the lengthy investigations."[1]
