Air date: 2010-09-17

Runtime: 28 min

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.

Air date: 2010-09-24

Runtime: 29 min

Stephen Fry asks unanswerable questions about body parts beginning with the letter H.

Air date: 2010-10-01

Runtime: 29 min

Sean Lock, David Mitchell, Danny Baker and Alan Davies are quizzed on hoaxes.

Air date: 2010-10-08

Runtime: 29 min

Stephen Fry asks unanswerable questions about humans, with Jo Brand, Jack Dee, Jimmy Carr and Alan Davies.

Air date: 2010-10-15

Runtime: 29 min

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

Air date: 2010-10-22

Runtime: 29 min

Stephen Fry asks unanswerable questions about happiness, with Andy Hamilton, Rich Hall, Phill Jupitus and Alan Davies.

Air date: 2010-10-29

Runtime: 29 min

Stephen Fry asks unanswerable questions about Halloween, with Chris Addison, Sean Lock, Dara Ó Briain and Alan Davies.

Air date: 2010-11-05

Runtime: 29 min

Stephen Fry considers some hypothetical questions with panellists Sandi Toksvig, John Lloyd, Johnny Vegas and Alan Davies.

Air date: 2010-11-12

Runtime: 29 min

Stephen Fry asks unanswerable questions about house and home, with Bill Bailey, Eddie Izzard, Danny Baker and Alan Davies.

Air date: 2010-11-26

Runtime: 29 min

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

Air date: 2010-12-03

Runtime: 29 min

Stephen Fry asks unanswerable questions about highs and lows, with Rob Brydon, Fred MacAuley, Sandy Toksvig and Alan Davies.

Air date: 2010-12-10

Runtime: 29 min

Stephen Fry asks unanswerable questions about horses and hunting, with Clare Balding, Dara Ó Briain, Jimmy Carr and Alan Davies.

Air date: 2010-12-17

Runtime: 26 min

Stephen Fry asks unanswerable questions about Holidays, with Bill Bailey, Rich Hall, Rob Brydon and Alan Davies.

Air date: 2010-12-24

Runtime: 29 min

Stephen Fry conjures up some hocus-pocus in a special Christmas edition of the quiz, with Daniel Radcliffe, Lee Mack, Graham Norton and Alan Davies.

Air date: 2011-01-07

Runtime: 29 min

Stephen Fry asks questions about hypnosis, hallucinations and hysteria. With Ronni Ancona, Phill Jupitus, Robert Webb and Alan Davies.

Air date: 2011-01-14

Runtime: 29 min

Stephen Fry asks unanswerable questions about history. With Sandi Toksvig, David Mitchell, Rob Brydon and Alan Davies.

Air date: 2011-04-25

Runtime: 29 min

A compilation of some of the best bits from the H series of QI, with Stephen Fry, Alan Davies, and a host of special guests.

Air date: 2011-05-02

Runtime: 29 min

A compilation of some of the best bits from the H series of QI, with Stephen Fry, Alan Davies, and a host of special guests.