Underground and Underwater: Sandi Toksvig is joined by Zoe Lyons, Dan Tiernan, Josh Widdicombe and Alan Davies for an underground and underwater episode. [S]
Ice: In a festive edition of the cerebral panel show, Good King Stephen Fry harks at Eskimos, expeditions and Iceland with Ross Noble, Sean Lock, Brian Blessed and Alan Davies. [S]
Pubs: A Christmas Special: Sandi Toksvig has a Christmas knees-up in the pub with Alan Davies, Cariad Lloyd, Josh Widdicombe and Noel Fielding. Pub-themed questions are in order. [S]
Kris Kringle: Christmas Special: A feast of Stephen Fry as our jolly quiz-master and his QI elves get into the Christmas spirit with Jo Brand, Brendan O'Carroll, Phill Jupitus and Alan Davies. [S]
O Christmas: Christmas-themed posers. Jason Manford, Romesh Ranganathan and Holly Walsh learn the best way to wrap an awkwardly shaped present and get wine stains out of a carpet. [S]
Noel: Christmas Special: Festive facts with a Danish slant as Sandi Toksvig schools Josh Widdicombe, Susan Calman, Matt Lucas and Alan Davies on her homeland. [S]
Groovy: Another edition of the much-loved comedy quiz. Stephen Fry guarantees hip cats a cool Christmas as he is joined by David Tennant, Bill Bailey, Lee Mack and Alan Davies. [S]
Jingle Bells: Christmas Special: Jolly old Stephen Fry jingles a few bells with Sarah Millican, Phill Jupitus, Danny Baker and Alan Davies in a special festive edition of the quiz show. [S]
No L: Christmas Special: The big man and his QI elves deliver the gift of knowledge to Carrie Fisher, Bill Bailey, Jimmy Carr and Alan Davies in the very merry panel show's Christmas special. [S]
Hocus Pocus: In a special Christmas edition, Stephen Fry conjures up some hocus-pocus with series regular Alan Davies and guests Daniel Radcliffe, Lee Mack and Graham Norton. [S]
Hocus Pocus: In a special Christmas edition, Stephen Fry conjures up some hocus-pocus with series regular Alan Davies and guests Daniel Radcliffe, Lee Mack and Graham Norton. [S]
United: Sandi Toksvig's guests - Nabil Abdulrashid, Bill Bailey, Victoria Coren Mitchell and Alan Davies - are all in it together for this united episode. [S]
United: Sandi Toksvig's guests - Nabil Abdulrashid, Bill Bailey, Victoria Coren Mitchell and Alan Davies - are all in it together for this united episode. [S]
Parts: Sandi Toksvig is joined by Sara Pascoe, Johnny Vegas and Ed Balls and regular panellist Alan Davies, who answer questions about subjects associated with various parts. [S]
Piecemeal: Sandi Toksvig and regular panellist Alan Davies are joined by Jimmy Carr, Gyles Brandreth and Sally Phillips, who answer questions on the subject of piecemeal. [S]
Peril: Sandi Toksvig and regular panellist Alan Davies are joined by Aisling Bea, Lee Mack, Jason Manford to answer questions on the subject of peril. [S]
Panimals: Sandi Toksvig hosts the comedy panel quiz, with questions relating to animals that start with a P. Phill Jupitus, Danny Baker and Teri Hatcher join regular panellist Alan Davies. [S]
Mix and Match: Mind-improving miscellany with mine of information Stephen Fry, who's also fond of a magic trick. With Jo Brand, James Acaster, Bill Bailey and Alan Davies. [S]
Misconceptions: The witty quiz that thrives on fallacies. Sue Perkins, Sara Cox and Chris Addison guest as departing host Stephen Fry docks Alan Davies points one last time. [S]
Messy: Quite complex quizzing. Things get messy as Stephen Fry learns whether Sarah Millican, Eddie Kadi, Noel Fielding and Alan Davies know their mugwumps from their mullipuffs. [S]
Monster Mash: The smash-hit quiz show that caught on in a flash. Beastly quizmaster Stephen Fry is an eerie sight for Sara Pascoe, Josh Widdicombe, Phill Jupitus and Alan Davies. [S]
Menagerie: Stephen Fry asks Sue Perkins, Romesh Ranganathan, Bill Bailey and Alan Davies beastly posers on moose, monkeys and moustachioed toads in the highly evolved quiz. [S]
Making a Meal of It: Witty panel show. Stephen Fry gives us food for thought as Cariad Lloyd, Dermot O'Leary, Phill Jupitus and Alan Davies make a right meal of the answers. [S]
Messing With Your Mind: Stephen Fry messes with the minds of Sarah Millican, Tommy Tiernan, Josh Widdicombe and Alan Davies, pooh-poohing everything they thought they knew. [S]
Merriment: Old scrooge Stephen Fry docks Jenny Eclair, Johnny Vegas, Bill Bailey and Alan Davies points in this XL-mas special. And can you spot the Morse code in Morse? [S]
Middle Muddle: Stephen Fry reveals everything you know is wrong. Guests Aisling Bea, Danny Bhoy, Jimmy Carr and Alan Davies muddle through questions on monocles and manholes. [S]
Maths: Stephen Fry dispels the factoids that don't quite add up in the panel show that's tougher than algebra. With Sandi Toksvig, Aisling Bea, Susan Calman and Alan Davies. [S]
M-Places: Sue Perkins, Sami Shah, David Mitchell and Alan Davies join Stephen Fry on a trip to the Mountains of Kong, Mummerset and Brown Willy. Stop sniggering at the back. [S]
Military Matters: Before the Sandi Toksvig coup, general of knowledge Stephen Fry soldiered on to fire posers at Sheila Hancock, Jeremy Clarkson, Jimmy Carr and Alan Davies. [S]
A Medley of Maladies: What did Typhoid Mary die of? Stephen Fry poses the klaxon-baiting questions on medical matters to Lucy Porter, Ross Noble, Matt Lucas and Alan Davies. [S]
Geometry: Stephen Fry hosts the learned quiz show in which contestants have 'quite interesting' answers rewarded. The panel try to prove they are not obtuse when it comes to geometry. [S]
Green: Witty quiz. Stephen Fry urges Jeremy Clarkson, Bill Bailey, Danny Baker and Alan Davies to eat their greens - and their words - as he entraps them with commonly confused facts. [S]
Gothic: Fact-filled fun in the informative quiz. Stephen Fry goes all Gothic as he considers gargoyles and grotesques with help from Sue Perkins, Jimmy Carr, Jack Dee and Alan Davies. [S]
Gravity: Points are awarded for simply being interesting in this hit panel quiz. Barry Humphries, Bill Bailey, Rich Hall, Alan Davies and host Stephen Fry float some ideas on gravity. [S]
Gifts: Stephen Fry bestows his knowledge in the quick-witted quiz. Our genial host hands out point-based presents to guests Jan Ravens, Jimmy Carr, Clive Anderson and Alan Davies. [S]
Greats: The exalted quiz show! Jo Brand, David Mitchell, Sean Lock and Alan Davies grapple with greats including eminent host Stephen Fry and his superior line in questions. [S]
Gallimaufrey: Being quite interesting wins points in the offbeat comedy quiz. Stephen Fry introduces Phill Jupitus, Hugh Dennis and Andy Hamilton to a gallimaufrey of gingambobs. [S]