Stephen Fry asks unanswerable questions about a hodge-podge of topics beginning with the letter H, with Ross Noble, Jack Dee, Phill Jupitus and Alan Davies.

Stephen Fry asks unanswerable questions about animals which begin with the letter H, with Ruby Wax, Ross Noble, Sean Lock and Alan Davies.

Stephen Fry asks unanswerable questions about health and safety, with Ross Noble, David Mitchell, Jeremy Clarkson and Alan Davies.

Stephen Fry considers some incomprehensible questions with Sue Perkins, Ross Noble, Professor Brian Cox and Alan Davies.

In a special Christmas edition, Stephen Fry looks at ice. With contestants Ross Noble, Sean Lock, Brian Blessed and Alan Davies.

Stephen Fry takes a lazy look at idleness with Ross Noble, Dara Ó Briain, Jeremy Clarkson and Alan Davies.

Stephen Fry asks for 'quite interesting' answers about journalism. With Shappi Khorsandi, Ross Noble, Johnny Vegas and Alan Davies.

Stephen Fry looks at jeopardy. With Julia Zemiro, Sue Perkins, Ross Noble and Alan Davies.

Stephen Fry looks at jumpers, with Julian Clary, Ross Noble, Bill Bailey and Alan Davies.

Stephen Fry looks at a whole kit and kaboodle of K topics. With Noel Fielding, Ross Noble, Colin Lane and Alan Davies.

Stephen Fry looks into knits, knots and other things starting with K, with Sue Perkins, Ross Noble, David Mitchell and Alan Davies.

From lonely whales to larval locomotives, Stephen Fry takes a look at the animal kingdom themed around the letter L. With Sarah Millican, Ross Noble, Colin Lane and Alan Davies.

The ladies and gents on the panel are Ross Noble, Kathy Lette, Sue Perkins and Alan Davies.

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

Sandi Toksvig hosts a nosey, noisy episode of QI with Aisling Bea, Corey Taylor, Ross Noble and Alan Davies.

Sandi Toksvig looks at nature and nurture with Ross Noble, Cariad Lloyd, David Baddiel and Alan Davies.

Sandi Toksvig hosts the 'Next' episode of QI with Lucy Porter, Frankie Boyle, Ross Noble and Alan Davies.

Sandi Toksvig considers all things Odorous and Odious. Why is the world's second-smelliest man so frustrated? Sandi has the answer. With Nish Kumar, Sally Phillips, Ross Noble and Alan Davies.

Sandi has fun with some ticks, a bit of tax, a few toes – and a pile of matchboxes that plays tic-tac-toe with Rose Matafeo, Lou Sanders, Ross Noble and Alan Davies.