Stephen Fry mulls over some medical matters with Lucy Porter, Ross Noble, Matt Lucas and Alan Davies.

Stephen Fry marshals miscellaneous military matters with Sheila Hancock, Jimmy Carr, Jeremy Clarkson and Alan Davies.

Stephen Fry meanders about some places which start with an 'M' with Sue Perkins, Sami Shah, David Mitchell and Alan Davies.

Stephen Fry mulls over miscellaneous M-themed matters with Cariad Lloyd, Rhod Gilbert, Noel Fielding and Alan Davies.

Stephen Fry masters the maths with Sandi Toksvig, Aisling Bea, Susan Calman and Alan Davies.

Stephen Fry makes merry with marriage and mating with Jo Brand, Greg Davies, Bill Bailey and Alan Davies.

Stephen Fry muddles through the middle show of the middle series of QI with Aisling Bea, Danny Bhoy, Jimmy Carr and Alan Davies.

Stephen Fry conjures up some seasonal merriment with Jenny Eclair, Johnny Vegas, Bill Bailey and Alan Davies.

Stephen Fry messes with your mind with Sarah Millican, Tommy Tiernan, Josh Widdicombe and Alan Davies.

Featuring M foods, with Cariad Lloyd, Dermot O'Leary, Phill Jupitus and Alan Davies.

Stephen Fry visits the menagerie for a look at some animals which start with the letter M.

With Matt Lucas, David Mitchell and Julia Zemiro.

With Josh Widdicombe, Phill Jupitus and Sara Pascoe.

With Noel Fielding, Eddie Kadi and Sarah Millican.

With James Acaster, Bill Bailey and Jo Brand.

With Chris Addison, Sara Cox and Sue Perkins.

Compilation from Series M, part 1.

Compilation from Series M, part 2.