QI (Quite Interesting) is a BBC comedy panel game television show that began in 2003.
It was created by John Lloyd, and was hosted by Stephen Fry until the end of Series 13 [M] (13 years) after which Sandi Toksvig took over, and features permanent panellist Alan Davies.
From the ninth series, QI returned to BBC Two on Friday at 10 pm with the XL edition on Saturdays.
For the first half of the series, the standard edition aired on the following Sunday for the first 3 episodes, changing to the following Monday for the remaining 5.
XL editions were broadcast the following day on BBC Two, from "Flotsam and Jetsam" onwards.