STEPHEN FRY

There are so many great QI moments. My favorites include (in no particular order):

"They say at the Acroplis where the Parthenon is..."
The Mannikin bird moonwalking to Shalamar (and Alan and Bill Bailey's riff of Night to Remember)
The 'space porn' bit in the same episode (Series E, episode 4)
When Alan acts as host and Stephen joins the panel
Madeira pince-nez and Stephen's tailor
Big Graham Osmond in the attic (Alan and Bill Bailey)
Dara O'Briain--playing the piano 'to get out of the ghetto', his mail order bride and the response to the point deduction for 'boiling water'.
All references to the 'number of moons'.
Jo Brand laughing/crying her makeup off while Julian Clary tells about meeting the Queen and misjudging a fart.
Stephen finally giving Alan a Blue Whale question--but en Francais.
The show where they could reverse their loss of points by playing 'Rock, Paper, Scissors' against Stephen.
David Mitchell on 'Atheist Heaven' and the camel passing through the eye of the needle.
The giant turtles that were so tasty they couldn't get them back to England to be studied and named.
Alan's "Why do they believe it Stephen..." Bronze age mythology riff.
Graham Norton telling the story of the serial killer's daughter (and her imagined wedding reception)
How to sex a chicken